Add bounded GRB map acquisition

.env.example

@@ -14,6 +14,17 @@ ORTHOPHOTO_MAX_SIDE_M=1024
 ORTHOPHOTO_CACHE_TTL_HOURS=24
 SOURCE_CATALOG_PROBE_ENABLED=true
 SOURCE_CATALOG_GRB_WFS_URL=https://geo.api.vlaanderen.be/GRB/wfs
+GRB_ENABLED=true
+GRB_OGC_API_URL=https://geo.api.vlaanderen.be/GRB/ogc/features/v1
+GRB_MIN_SIDE_M=10
+GRB_MAX_SIDE_M=20000
+GRB_PAGE_SIZE=1000
+GRB_MAX_PAGES=200
+GRB_MAX_FEATURES=150000
+GRB_TIMEOUT_SECONDS=180
+GRB_MAX_RESPONSE_MB=20
+GRB_MAX_TOTAL_RESPONSE_MB=256
+GRB_CACHE_TTL_HOURS=24
 SOURCE_CATALOG_STATBEL_DCAT_URL=https://doc.statbel.be/publications/DCAT/DCAT_opendata_datasets.ttl
 SOURCE_CATALOG_STATBEL_MAX_RESPONSE_MB=5
 SOURCE_CATALOG_ALZ_RELEASE_URL=https://landbouwcijfers.vlaanderen.be/open-geodata-landbouwgebruikspercelen

CHANGELOG.md

@@ -7,6 +7,23 @@
 
 # Changelog
 
+## Sprint 239 Governed bounded GRB map acquisition (2026-07-17)
+
+- Added a fixed four-product GRB registry for buildings, roads, water and
+  administrative parcels through the official OGC API Features service.
+- Added bounded acquisition with exact `bbox ∩ Area` clipping, complete
+  allowlisted pagination, response/feature limits, request and artifact
+  checksums, 24-hour identity cache and canonical Job/Dataset/VectorFeature
+  persistence.
+- Added semantic selection metrics for building footprint, road length, water
+  area/supporting line length and parcel area without fabricating traffic,
+  legal-boundary or water-volume data.
+- Extended the Flanders map catalog and all-theme analysis so the four GRB
+  products are usable on demand without browser-side external calls.
+- Updated the provider registry to report the bounded GRB integration as
+  configured while keeping the old generic import/fetch contract non-fetching
+  and directing callers to the governed project endpoint.
+
 ## Sprint 238 Governed Flanders terrain and flood selection (2026-07-17)
 
 - Unified the Flanders map selection flow behind one official-raster

backend/README.md

@@ -1360,6 +1360,38 @@ idempotent for the exact plan/raster checksum, creates a new immutable raster
 Dataset and DatasetVersion with the official edition, and retains every older
 snapshot. No command is scheduled or invoked by startup or browser actions.
 
+## Governed bounded GRB acquisition
+
+`GET /api/v1/projects/{project_id}/datasets/grb/products` exposes four fixed
+official vector products: building footprints, road segments, water
+surfaces/lines and administrative parcels. `POST .../datasets/grb/acquire`
+accepts an EPSG:4326 rectangle, optional project Area, one product key and an
+explicit refresh flag.
+
+The service queries only the allowlisted GRB OGC API collection paths, follows
+complete same-host pagination and clips every geometry to `bbox ∩ Area`.
+It explicitly requests OGC CRS84 GeoJSON for bbox and output; the native
+EPSG:31370 storage CRS remains provenance rather than being guessed from raw
+coordinates.
+Requests fail closed above 20 km per side, 200 pages, 150,000 retained
+features, 20 MiB per page or 256 MiB total. No partial Dataset is persisted
+when a limit is exceeded. Official ids, request URLs, page checksums and the
+final artifact checksum are retained as provenance.
+
+Persistence uses the existing synchronous Job plus
+`DatasetService.import_vector_bytes`, so Dataset, DatasetVersion and
+VectorFeature rows remain one canonical flow. The browser never contacts the
+provider directly. Exact request identities are reused for 24 hours. Buildings
+return footprint area in hectares, roads return line length in kilometres,
+water returns surface area plus supporting water-line length, and parcels
+return mapped area. GRB cannot provide water volume, legal parcel boundaries
+or traffic information.
+
+Settings: `GRB_ENABLED`, `GRB_OGC_API_URL`, `GRB_MIN_SIDE_M`,
+`GRB_MAX_SIDE_M`, `GRB_PAGE_SIZE`, `GRB_MAX_PAGES`, `GRB_MAX_FEATURES`,
+`GRB_TIMEOUT_SECONDS`, `GRB_MAX_RESPONSE_MB`,
+`GRB_MAX_TOTAL_RESPONSE_MB` and `GRB_CACHE_TTL_HOURS`.
+
 ## Governed DHMV terrain acquisition
 
 `GET /api/v1/projects/{project_id}/datasets/dhmv/products` exposes the fixed

backend/app/api/routes/datasets.py

@@ -31,6 +31,7 @@ from app.schemas import (
     BathymetryProfileAcquireRequest,
     ThematicRasterAcquireRequest,
     ThematicRasterSelectionRequest,
+    GrbAcquireRequest,
     VectorBBoxResponse,
     VectorBufferRequest,
     VectorClipRequest,
@@ -49,6 +50,7 @@ from app.services.dataset_service import DatasetService
 from app.services.source_freshness_service import SourceFreshnessService
 from app.services.source_catalog_probe_service import SourceCatalogProbeService
 from app.services.grb_refresh_plan_service import GrbRefreshPlanService
+from app.services.grb_acquisition_service import GrbAcquisitionService
 from app.services.orthophoto_acquisition_service import OrthophotoAcquisitionService
 from app.services.dhmv_acquisition_service import DhmvAcquisitionService
 from app.services.terrain_analysis_service import TerrainAnalysisService
@@ -193,6 +195,30 @@ def list_dhmv_products(project_id: UUID, db: Session = Depends(get_db)):
     return envelope({"items": items, "total": len(items)})
 
 
+@router.post("/datasets/grb/acquire", response_model=dict)
+def acquire_bounded_grb(
+    project_id: UUID,
+    payload: GrbAcquireRequest,
+    db: Session = Depends(get_db),
+):
+    job = JobService.run_sync_job(
+        db=db,
+        project_id=project_id,
+        job_type="vector.grb.acquire",
+        parameters=payload.model_dump(mode="json"),
+        operation=lambda: GrbAcquisitionService.acquire(db, project_id, payload),
+    )
+    return envelope(job)
+
+
+@router.get("/datasets/grb/products", response_model=dict)
+def list_grb_products(project_id: UUID, db: Session = Depends(get_db)):
+    if not db.get(Project, project_id):
+        raise AppError(code="PROJECT_NOT_FOUND", message="Project not found", status_code=404)
+    items = GrbAcquisitionService.list_products()
+    return envelope({"items": items, "total": len(items)})
+
+
 @router.post("/datasets/flood-hazard/acquire", response_model=dict)
 def acquire_bounded_flood_hazard(
     project_id: UUID,

backend/app/api/routes/health.py

@@ -39,7 +39,7 @@ def capabilities() -> dict:
         geopandas=_dependency_enabled("geopandas"),
         yolo=False,
         sam=False,
-        grb="planned",
+        grb="bounded",
         sentinel="planned",
         providers=providers,
     ).model_dump()}

backend/app/core/config.py

@@ -68,6 +68,25 @@ class Settings(BaseSettings):
         le=86_400,
         validation_alias="SOURCE_CATALOG_PROBE_CACHE_TTL_SECONDS",
     )
+    grb_enabled: bool = Field(default=True, validation_alias="GRB_ENABLED")
+    grb_ogc_api_url: str = Field(
+        default="https://geo.api.vlaanderen.be/GRB/ogc/features/v1",
+        validation_alias="GRB_OGC_API_URL",
+    )
+    grb_min_side_m: float = Field(default=10.0, gt=0, validation_alias="GRB_MIN_SIDE_M")
+    grb_max_side_m: float = Field(default=20_000.0, gt=0, validation_alias="GRB_MAX_SIDE_M")
+    grb_page_size: int = Field(default=1000, ge=1, le=1000, validation_alias="GRB_PAGE_SIZE")
+    grb_max_pages: int = Field(default=200, ge=1, le=1000, validation_alias="GRB_MAX_PAGES")
+    grb_max_features: int = Field(default=150_000, ge=1, validation_alias="GRB_MAX_FEATURES")
+    grb_timeout_seconds: int = Field(default=180, ge=1, le=600, validation_alias="GRB_TIMEOUT_SECONDS")
+    grb_max_response_mb: int = Field(default=20, ge=1, le=100, validation_alias="GRB_MAX_RESPONSE_MB")
+    grb_max_total_response_mb: int = Field(
+        default=256,
+        ge=1,
+        le=2048,
+        validation_alias="GRB_MAX_TOTAL_RESPONSE_MB",
+    )
+    grb_cache_ttl_hours: int = Field(default=24, ge=0, le=8760, validation_alias="GRB_CACHE_TTL_HOURS")
     dhmv_enabled: bool = Field(default=True, validation_alias="DHMV_ENABLED")
     dhmv_wcs_url: str = Field(
         default="https://geo.api.vlaanderen.be/DHMV/wcs",

backend/app/providers/grb.py

@@ -9,12 +9,26 @@ class GRBProvider(BaseReferenceProvider):
             provider_name="grb",
             display_name="GRB",
             authority_level="authoritative",
-            supported_layers=["buildings", "roads", "parcels"],
+            supported_layers=["buildings", "roads", "water", "parcels"],
             supported_geometry_types=["Polygon", "MultiPolygon", "LineString", "MultiLineString"],
-            supported_query_modes=["area"],
+            supported_query_modes=["bbox", "persisted_area"],
-            fetch_signature="POST /api/v1/external/grb/fetch",
+            fetch_signature="POST /api/v1/projects/{project_id}/datasets/grb/acquire",
-            limitation_message="GRB live WFS/download integration is not configured in Sprint 7B.",
+            limitation_message=(
-            attribution="Digitaal Vlaanderen - Basiskaart Vlaanderen (GRB)",
+                "Alleen expliciet begrensde selecties tot 20 km per zijde worden opgehaald. "
-            license_note="Use must follow Digitaal Vlaanderen open data and attribution terms.",
+                "Volledige providerdownloads en onbeperkte queries zijn niet toegestaan."
-            configured=False,
+            ),
+            attribution="Bron: Grootschalig Referentie Bestand Vlaanderen, Digitaal Vlaanderen",
+            license_note="Hergebruik volgens de open-datavoorwaarden en bronvermelding van Digitaal Vlaanderen.",
+            configured=True,
         )
+
+    def fetch(self, project_id: str, area_id: str | None, layers: list[str]) -> dict:
+        del project_id, area_id, layers
+        return {
+            "provider": self.provider_name,
+            "status": "bounded_request_required",
+            "message": (
+                "Use POST /api/v1/projects/{project_id}/datasets/grb/acquire with an EPSG:4326 "
+                "bounding box and one governed product key."
+            ),
+        }

backend/app/providers/registry.py

@@ -78,11 +78,23 @@ class ExternalProviderRegistry:
         del project_id, area_id
         provider = self.get(provider_name)
         mapping = self.dataset_mapping(provider.provider_name, requested_dataset_role=requested_dataset_role)
-        if provider.provider_name in {"grb", "osm"}:
+        if provider.provider_name == "grb":
+            return ProviderImportResult(
+                provider_name="grb",
+                status="bounded_request_required",
+                message=(
+                    "Use the governed project GRB acquisition endpoint with an EPSG:4326 bounding box "
+                    "and one supported layer."
+                ),
+                requested_layers=layers,
+                dataset_role=mapping.dataset_role,
+                source_name=mapping.source_name,
+            )
+        if provider.provider_name == "osm":
             return ProviderImportResult(
                 provider_name=provider.provider_name,
                 status="not_configured",
-                message=f"No live {provider.display_name} import is configured in Sprint 7B.",
+                message=f"No live {provider.display_name} import is configured.",
                 requested_layers=layers,
                 dataset_role=mapping.dataset_role,
                 source_name=mapping.source_name,

backend/app/schemas/__init__.py

@@ -17,6 +17,7 @@ from .source_catalog import (
     SourceCatalogProbeSummary,
 )
 from .grb_refresh import GrbRefreshLayerPlan, GrbRefreshPlan, GrbRefreshPlanSummary
+from .grb import GrbAcquireRequest, GrbAcquisitionResult, GrbProductRead
 from .detection import (
     DetectionListResponse,
     DetectionModelCapability,
@@ -161,6 +162,9 @@ __all__ = [
     "GrbRefreshLayerPlan",
     "GrbRefreshPlan",
     "GrbRefreshPlanSummary",
+    "GrbAcquireRequest",
+    "GrbAcquisitionResult",
+    "GrbProductRead",
     "DetectionListResponse",
     "DetectionModelCapability",
     "DetectionModelsResponse",

backend/app/schemas/grb.py

@@ -0,0 +1,45 @@
+from __future__ import annotations
+
+from uuid import UUID
+
+from pydantic import BaseModel
+
+from .operations import VectorSelectionBBox
+
+
+class GrbAcquireRequest(BaseModel):
+    bbox: VectorSelectionBBox
+    area_id: UUID | None = None
+    product_key: str = "buildings"
+    force_refresh: bool = False
+
+
+class GrbProductRead(BaseModel):
+    key: str
+    display_name: str
+    reference_layer_name: str
+    collections: list[str]
+    geometry_types: list[str]
+    source_crs: str
+    authority_level: str
+    catalog_url: str
+    attribution: str
+    license_note: str
+    limitation_message: str
+
+
+class GrbAcquisitionResult(BaseModel):
+    output_dataset_id: UUID
+    reused: bool
+    provider: str
+    product_key: str
+    display_name: str
+    reference_layer_name: str
+    collections: list[str]
+    feature_count: int
+    candidate_feature_count: int
+    page_count: int
+    bbox_epsg4326: list[float]
+    source_version: str
+    attribution: str
+    limitation_message: str

backend/app/services/grb_acquisition_service.py

@@ -0,0 +1,779 @@
+from __future__ import annotations
+
+from dataclasses import dataclass
+from datetime import UTC, datetime, timedelta
+import hashlib
+import json
+import math
+from pathlib import Path
+from typing import Any, Callable
+from urllib.error import HTTPError, URLError
+from urllib.parse import parse_qsl, urlencode, urljoin, urlparse, urlunparse
+from urllib.request import HTTPRedirectHandler, Request, build_opener
+from uuid import UUID
+
+from geoalchemy2.shape import to_shape
+from pyproj import Transformer
+from shapely.geometry import LineString, MultiLineString, MultiPolygon, Polygon, box, mapping, shape
+from shapely.ops import unary_union
+from shapely.validation import make_valid
+
+from app.core.config import Settings, get_settings
+from app.core.errors import AppError
+from app.models import Area, Dataset, Project
+from app.schemas.grb import GrbAcquireRequest, GrbAcquisitionResult, GrbProductRead
+from app.services.dataset_service import DatasetService
+
+
+class _RejectRedirects(HTTPRedirectHandler):
+    def redirect_request(self, req, fp, code, msg, headers, newurl):
+        del req, fp, code, msg, headers, newurl
+        return None
+
+
+_NO_REDIRECT_OPENER = build_opener(_RejectRedirects())
+
+
+@dataclass(frozen=True)
+class GrbCollection:
+    name: str
+    geometry_dimension: int
+
+
+@dataclass(frozen=True)
+class GrbProduct:
+    key: str
+    display_name: str
+    reference_layer_name: str
+    layer_type: str
+    collections: tuple[GrbCollection, ...]
+    geometry_types: tuple[str, ...]
+    metric_key: str
+    metric_method: str
+    metric_label: str
+    metric_unit: str
+    metric_dimension: int
+    metric_warning: str
+    limitation_message: str
+
+
+class GrbAcquisitionService:
+    PROVIDER = "grb"
+    SOURCE_CRS = "EPSG:4326"
+    OGC_CRS84_URI = "http://www.opengis.net/def/crs/OGC/1.3/CRS84"
+    AUTHORITY_LEVEL = "authoritative"
+    ATTRIBUTION = "Bron: Grootschalig Referentie Bestand Vlaanderen, Digitaal Vlaanderen"
+    LICENSE_NOTE = "Hergebruik volgens de open-datavoorwaarden en bronvermelding van Digitaal Vlaanderen."
+    CATALOG_URL = "https://www.vlaanderen.be/datavindplaats/catalogus/basiskaart-vlaanderen-grb"
+
+    @staticmethod
+    def _products() -> dict[str, GrbProduct]:
+        products = (
+            GrbProduct(
+                key="buildings",
+                display_name="GRB gebouwcontouren",
+                reference_layer_name="buildings",
+                layer_type="building",
+                collections=(GrbCollection("GBG", 2),),
+                geometry_types=("Polygon", "MultiPolygon"),
+                metric_key="footprint_area",
+                metric_method="intersection_area",
+                metric_label="Bebouwde grondoppervlakte",
+                metric_unit="ha",
+                metric_dimension=2,
+                metric_warning=(
+                    "Dit is de grondoppervlakte van gebouwcontouren, niet de totale vloeroppervlakte "
+                    "of het gebouwvolume."
+                ),
+                limitation_message=(
+                    "GRB GBG bevat gebouwcontouren uit de basiskaart. Registratie en fysieke verandering "
+                    "kunnen in tijd verschillen."
+                ),
+            ),
+            GrbProduct(
+                key="roads",
+                display_name="GRB wegsegmenten",
+                reference_layer_name="roads",
+                layer_type="road",
+                collections=(GrbCollection("Wegsegment", 1),),
+                geometry_types=("LineString", "MultiLineString"),
+                metric_key="road_length",
+                metric_method="intersection_length",
+                metric_label="Totale weglengte",
+                metric_unit="km",
+                metric_dimension=1,
+                metric_warning=(
+                    "De lengte volgt GRB-wegsegmenten en zegt niets over rijstroken, verkeersvolume "
+                    "of verhardingsoppervlakte."
+                ),
+                limitation_message=(
+                    "GRB Wegsegment beschrijft netwerkgeometrie en is geen verkeersmodel of routeadvies."
+                ),
+            ),
+            GrbProduct(
+                key="water",
+                display_name="GRB wateroppervlakken en waterlijnen",
+                reference_layer_name="water",
+                layer_type="water",
+                collections=(
+                    GrbCollection("WTZ", 2),
+                    GrbCollection("WLAS", 1),
+                    GrbCollection("WGR", 1),
+                ),
+                geometry_types=("LineString", "MultiLineString", "Polygon", "MultiPolygon"),
+                metric_key="water_area",
+                metric_method="intersection_area",
+                metric_label="Wateroppervlakte",
+                metric_unit="ha",
+                metric_dimension=2,
+                metric_warning=(
+                    "Watervolume is niet berekenbaar zonder betrouwbare diepte- of bathymetrische gegevens. "
+                    "De GRB-bron levert alleen oppervlakte- en lijngeometrie."
+                ),
+                limitation_message=(
+                    "GRB-water combineert wateroppervlakken en watergerelateerde lijnen. Objectaantallen en "
+                    "oppervlakte zijn geen actueel waterpeil of watervolume."
+                ),
+            ),
+            GrbProduct(
+                key="parcels",
+                display_name="GRB administratieve percelen",
+                reference_layer_name="parcels",
+                layer_type="parcel",
+                collections=(GrbCollection("ADP", 2),),
+                geometry_types=("Polygon", "MultiPolygon"),
+                metric_key="parcel_area",
+                metric_method="intersection_area",
+                metric_label="Perceeloppervlakte",
+                metric_unit="ha",
+                metric_dimension=2,
+                metric_warning=(
+                    "GRB-percelen zijn een grafische referentie en vormen geen juridische grensopmeting."
+                ),
+                limitation_message=(
+                    "GRB ADP toont de vermoedelijke ligging van kadastrale percelen en is geen juridische grens."
+                ),
+            ),
+        )
+        return {product.key: product for product in products}
+
+    @staticmethod
+    def list_products() -> list[dict[str, Any]]:
+        return [
+            GrbProductRead(
+                key=product.key,
+                display_name=product.display_name,
+                reference_layer_name=product.reference_layer_name,
+                collections=[collection.name for collection in product.collections],
+                geometry_types=list(product.geometry_types),
+                source_crs=GrbAcquisitionService.SOURCE_CRS,
+                authority_level=GrbAcquisitionService.AUTHORITY_LEVEL,
+                catalog_url=GrbAcquisitionService.CATALOG_URL,
+                attribution=GrbAcquisitionService.ATTRIBUTION,
+                license_note=GrbAcquisitionService.LICENSE_NOTE,
+                limitation_message=product.limitation_message,
+            ).model_dump()
+            for product in GrbAcquisitionService._products().values()
+        ]
+
+    @staticmethod
+    def _product(product_key: str) -> GrbProduct:
+        product = GrbAcquisitionService._products().get(product_key.strip().lower())
+        if product is None:
+            raise AppError(
+                code="GRB_PRODUCT_NOT_SUPPORTED",
+                message="Select buildings, roads, water or parcels from the governed GRB product registry",
+                details={"product_key": product_key},
+                status_code=422,
+            )
+        return product
+
+    @staticmethod
+    def _validate_scope(
+        db,
+        project_id: UUID,
+        payload: GrbAcquireRequest,
+        settings: Settings,
+    ) -> tuple[Any, list[float], list[float]]:
+        if not settings.grb_enabled:
+            raise AppError(code="GRB_NOT_CONFIGURED", message="Bounded GRB acquisition is disabled", status_code=503)
+        if not db.get(Project, project_id):
+            raise AppError(code="PROJECT_NOT_FOUND", message="Project not found", status_code=404)
+        if payload.bbox.crs.upper() != "EPSG:4326":
+            raise AppError(code="GRB_INVALID_CRS", message="GRB acquisition requires EPSG:4326", status_code=400)
+        values = (payload.bbox.min_x, payload.bbox.min_y, payload.bbox.max_x, payload.bbox.max_y)
+        if not all(math.isfinite(value) for value in values):
+            raise AppError(code="GRB_INVALID_BBOX", message="Bounding box values must be finite", status_code=400)
+        if values[0] >= values[2] or values[1] >= values[3]:
+            raise AppError(code="GRB_INVALID_BBOX", message="Bounding box has no area", status_code=400)
+        if values[0] < -180 or values[2] > 180 or values[1] < -90 or values[3] > 90:
+            raise AppError(code="GRB_INVALID_BBOX", message="Bounding box is outside EPSG:4326", status_code=400)
+
+        transformer = Transformer.from_crs("EPSG:4326", "EPSG:31370", always_xy=True)
+        metric_bounds = transformer.transform_bounds(*values, densify_pts=21)
+        width_m = float(metric_bounds[2] - metric_bounds[0])
+        height_m = float(metric_bounds[3] - metric_bounds[1])
+        if width_m < settings.grb_min_side_m or height_m < settings.grb_min_side_m:
+            raise AppError(
+                code="GRB_SELECTION_TOO_SMALL",
+                message=f"Select an area of at least {settings.grb_min_side_m:g} by {settings.grb_min_side_m:g} metres",
+                status_code=422,
+            )
+        if width_m > settings.grb_max_side_m or height_m > settings.grb_max_side_m:
+            raise AppError(
+                code="GRB_SELECTION_TOO_LARGE",
+                message=f"Select an area no larger than {settings.grb_max_side_m:g} by {settings.grb_max_side_m:g} metres",
+                details={"width_m": width_m, "height_m": height_m},
+                status_code=422,
+            )
+
+        selection = box(*values)
+        if payload.area_id is None:
+            scope_geometry = selection
+        else:
+            area = db.get(Area, payload.area_id)
+            if area is None:
+                raise AppError(code="AREA_NOT_FOUND", message="Area not found", status_code=404)
+            if area.project_id != project_id:
+                raise AppError(code="INVALID_DATASET_SCOPE", message="Area does not belong to this project", status_code=400)
+            scope_geometry = to_shape(area.geometry).intersection(selection)
+            if scope_geometry.is_empty:
+                raise AppError(
+                    code="GRB_SCOPE_EMPTY",
+                    message="The requested bounding box does not intersect the selected area",
+                    status_code=400,
+                )
+        return scope_geometry, [float(value) for value in values], [float(value) for value in metric_bounds]
+
+    @staticmethod
+    def _geometry_dimension(geometry: Any) -> int:
+        if geometry is None or geometry.is_empty:
+            return -1
+        if "Polygon" in geometry.geom_type:
+            return 2
+        if "LineString" in geometry.geom_type or geometry.geom_type == "LinearRing":
+            return 1
+        if "Point" in geometry.geom_type:
+            return 0
+        if hasattr(geometry, "geoms"):
+            return max((GrbAcquisitionService._geometry_dimension(item) for item in geometry.geoms), default=-1)
+        return -1
+
+    @staticmethod
+    def _extract_dimension(geometry: Any, expected_dimension: int) -> Any | None:
+        if geometry is None or geometry.is_empty:
+            return None
+        if not geometry.is_valid:
+            geometry = make_valid(geometry)
+        parts: list[Any] = []
+
+        def collect(candidate: Any) -> None:
+            if candidate is None or candidate.is_empty:
+                return
+            if expected_dimension == 2:
+                if isinstance(candidate, Polygon):
+                    parts.append(candidate)
+                    return
+                if isinstance(candidate, MultiPolygon):
+                    parts.extend(item for item in candidate.geoms if not item.is_empty)
+                    return
+            if expected_dimension == 1:
+                if isinstance(candidate, LineString):
+                    parts.append(candidate)
+                    return
+                if isinstance(candidate, MultiLineString):
+                    parts.extend(item for item in candidate.geoms if not item.is_empty)
+                    return
+            if hasattr(candidate, "geoms"):
+                for item in candidate.geoms:
+                    collect(item)
+
+        collect(geometry)
+        if not parts:
+            return None
+        normalized = unary_union(parts)
+        if normalized.is_empty:
+            return None
+        if not normalized.is_valid:
+            normalized = make_valid(normalized)
+        if (
+            normalized.is_empty
+            or not normalized.is_valid
+            or GrbAcquisitionService._geometry_dimension(normalized) != expected_dimension
+        ):
+            return None
+        return normalized
+
+    @staticmethod
+    def _collection_url(settings: Settings, collection: GrbCollection, bbox_values: tuple[float, ...]) -> str:
+        base = settings.grb_ogc_api_url.rstrip("/")
+        query = urlencode(
+            {
+                "f": "application/geo+json",
+                "limit": str(settings.grb_page_size),
+                "bbox": ",".join(f"{value:.8f}" for value in bbox_values),
+                "bbox-crs": GrbAcquisitionService.OGC_CRS84_URI,
+                "crs": GrbAcquisitionService.OGC_CRS84_URI,
+            }
+        )
+        return f"{base}/collections/{collection.name}/items?{query}"
+
+    @staticmethod
+    def _validated_page_url(
+        url: str,
+        settings: Settings,
+        product: GrbProduct,
+        bbox_values: tuple[float, ...],
+    ) -> str:
+        parsed = urlparse(url)
+        base = urlparse(settings.grb_ogc_api_url)
+        allowed_paths = {
+            f"{base.path.rstrip('/')}/collections/{collection.name}/items"
+            for collection in product.collections
+        }
+        if (
+            parsed.scheme != "https"
+            or base.scheme != "https"
+            or parsed.netloc.casefold() != base.netloc.casefold()
+            or parsed.path not in allowed_paths
+        ):
+            raise AppError(
+                code="GRB_PROVIDER_INVALID_PAGINATION",
+                message="GRB returned a pagination URL outside the governed OGC API allowlist",
+                status_code=502,
+            )
+        query = dict(parse_qsl(parsed.query, keep_blank_values=True))
+        query.update(
+            {
+                "f": "application/geo+json",
+                "limit": str(settings.grb_page_size),
+                "bbox": ",".join(f"{value:.8f}" for value in bbox_values),
+                "bbox-crs": GrbAcquisitionService.OGC_CRS84_URI,
+                "crs": GrbAcquisitionService.OGC_CRS84_URI,
+            }
+        )
+        return urlunparse((parsed.scheme, parsed.netloc, parsed.path, "", urlencode(query), ""))
+
+    @staticmethod
+    def _read_page(
+        url: str,
+        settings: Settings,
+        opener: Callable[..., Any] | None,
+    ) -> tuple[dict[str, Any], str, int]:
+        request = Request(
+            url,
+            headers={
+                "Accept": "application/geo+json, application/json",
+                "User-Agent": "GeoIntel/1.0 bounded-grb-acquisition",
+            },
+        )
+        try:
+            with (opener or _NO_REDIRECT_OPENER.open)(
+                request,
+                timeout=settings.grb_timeout_seconds,
+            ) as response:
+                limit = settings.grb_max_response_mb * 1024 * 1024
+                content = response.read(limit + 1)
+        except HTTPError as exc:
+            raise AppError(
+                code="GRB_PROVIDER_HTTP_ERROR",
+                message="The GRB OGC API returned an HTTP error",
+                details={"status_code": exc.code},
+                status_code=502,
+            ) from exc
+        except (TimeoutError, URLError, OSError) as exc:
+            raise AppError(
+                code="GRB_PROVIDER_UNAVAILABLE",
+                message="The GRB OGC API is unavailable",
+                status_code=502,
+            ) from exc
+        if len(content) > limit:
+            raise AppError(
+                code="GRB_PROVIDER_RESPONSE_TOO_LARGE",
+                message="A GRB response page exceeded the configured size limit",
+                status_code=502,
+            )
+        try:
+            payload = json.loads(content.decode("utf-8"))
+        except (UnicodeDecodeError, json.JSONDecodeError) as exc:
+            raise AppError(
+                code="GRB_PROVIDER_INVALID_RESPONSE",
+                message="The GRB OGC API returned invalid GeoJSON",
+                status_code=502,
+            ) from exc
+        if not isinstance(payload, dict) or payload.get("type") != "FeatureCollection":
+            raise AppError(
+                code="GRB_PROVIDER_INVALID_RESPONSE",
+                message="The GRB OGC API returned a non-FeatureCollection response",
+                status_code=502,
+            )
+        return payload, hashlib.sha256(content).hexdigest(), len(content)
+
+    @staticmethod
+    def _next_url(payload: dict[str, Any], current_url: str) -> str | None:
+        links = payload.get("links")
+        if not isinstance(links, list):
+            return None
+        for link in links:
+            if isinstance(link, dict) and link.get("rel") == "next" and link.get("href"):
+                return urljoin(current_url, str(link["href"]))
+        return None
+
+    @staticmethod
+    def _fetch_features(
+        product: GrbProduct,
+        scope_geometry: Any,
+        bbox_values: tuple[float, ...],
+        coverage_scope: str,
+        settings: Settings,
+        opener: Callable[..., Any] | None,
+    ) -> tuple[list[dict[str, Any]], dict[str, Any]]:
+        retained: list[dict[str, Any]] = []
+        seen_ids: set[str] = set()
+        request_urls: list[str] = []
+        response_sha256: list[str] = []
+        candidate_feature_count = 0
+        total_response_bytes = 0
+        geometry_types: dict[str, int] = {}
+        collection_counts: dict[str, int] = {item.name: 0 for item in product.collections}
+
+        for collection in product.collections:
+            url: str | None = GrbAcquisitionService._collection_url(settings, collection, bbox_values)
+            seen_pages: set[str] = set()
+            while url:
+                url = GrbAcquisitionService._validated_page_url(url, settings, product, bbox_values)
+                if url in seen_pages:
+                    raise AppError(
+                        code="GRB_PROVIDER_PAGINATION_LOOP",
+                        message="The GRB OGC API repeated a pagination URL",
+                        status_code=502,
+                    )
+                if len(request_urls) >= settings.grb_max_pages:
+                    raise AppError(
+                        code="GRB_SELECTION_TOO_LARGE",
+                        message="GRB acquisition exceeded the configured page limit",
+                        details={"max_pages": settings.grb_max_pages},
+                        status_code=422,
+                    )
+                seen_pages.add(url)
+                payload, response_hash, response_size = GrbAcquisitionService._read_page(url, settings, opener)
+                request_urls.append(url)
+                response_sha256.append(response_hash)
+                total_response_bytes += response_size
+                if total_response_bytes > settings.grb_max_total_response_mb * 1024 * 1024:
+                    raise AppError(
+                        code="GRB_PROVIDER_RESPONSE_TOO_LARGE",
+                        message="The complete GRB response exceeded the configured transfer limit",
+                        status_code=502,
+                    )
+
+                source_features = payload.get("features")
+                if not isinstance(source_features, list):
+                    raise AppError(
+                        code="GRB_PROVIDER_INVALID_RESPONSE",
+                        message="The GRB FeatureCollection has no valid feature list",
+                        status_code=502,
+                    )
+                for source_feature in source_features:
+                    candidate_feature_count += 1
+                    if not isinstance(source_feature, dict):
+                        continue
+                    raw_id = str(source_feature.get("id") or "").strip()
+                    if not raw_id:
+                        raise AppError(
+                            code="GRB_PROVIDER_INVALID_RESPONSE",
+                            message=f"GRB {collection.name} returned a feature without an official identity",
+                            status_code=502,
+                        )
+                    feature_id = f"{collection.name}:{raw_id}"
+                    if feature_id in seen_ids:
+                        continue
+                    seen_ids.add(feature_id)
+                    try:
+                        source_geometry = GrbAcquisitionService._extract_dimension(
+                            shape(source_feature.get("geometry")),
+                            collection.geometry_dimension,
+                        )
+                    except Exception as exc:
+                        raise AppError(
+                            code="GRB_PROVIDER_INVALID_GEOMETRY",
+                            message=f"GRB {collection.name} returned invalid geometry",
+                            status_code=502,
+                        ) from exc
+                    if source_geometry is None or not source_geometry.intersects(scope_geometry):
+                        continue
+                    retained_geometry = GrbAcquisitionService._extract_dimension(
+                        source_geometry.intersection(scope_geometry),
+                        collection.geometry_dimension,
+                    )
+                    if retained_geometry is None:
+                        continue
+                    if len(retained) >= settings.grb_max_features:
+                        raise AppError(
+                            code="GRB_SELECTION_TOO_LARGE",
+                            message="GRB selection exceeds the configured feature limit; draw a smaller rectangle",
+                            details={"max_features": settings.grb_max_features},
+                            status_code=422,
+                        )
+                    properties = dict(source_feature.get("properties") or {})
+                    properties.update(
+                        {
+                            "source_name": GrbAcquisitionService.PROVIDER,
+                            "source_collection": collection.name,
+                            "source_feature_id": feature_id,
+                            "reference_layer_name": product.reference_layer_name,
+                            "layer_type": product.layer_type,
+                            "theme": product.key,
+                            "authority_level": GrbAcquisitionService.AUTHORITY_LEVEL,
+                            "coverage_scope": coverage_scope,
+                            "geometry_clipped_to_selection": not scope_geometry.covers(source_geometry),
+                            "attribution": GrbAcquisitionService.ATTRIBUTION,
+                        }
+                    )
+                    retained.append(
+                        {
+                            "type": "Feature",
+                            "id": feature_id,
+                            "geometry": mapping(retained_geometry),
+                            "properties": properties,
+                        }
+                    )
+                    collection_counts[collection.name] += 1
+                    geometry_types[retained_geometry.geom_type] = geometry_types.get(retained_geometry.geom_type, 0) + 1
+                url = GrbAcquisitionService._next_url(payload, url)
+
+        return retained, {
+            "candidate_feature_count": candidate_feature_count,
+            "feature_count": len(retained),
+            "page_count": len(request_urls),
+            "request_urls": request_urls,
+            "response_sha256": response_sha256,
+            "response_size_bytes": total_response_bytes,
+            "collection_feature_counts": collection_counts,
+            "geometry_types": geometry_types,
+            "output_crs": GrbAcquisitionService.OGC_CRS84_URI,
+            "reference_truncated": False,
+        }
+
+    @staticmethod
+    def _cached_dataset(
+        db,
+        project_id: UUID,
+        product: GrbProduct,
+        request_hash: str,
+        settings: Settings,
+    ) -> Dataset | None:
+        if settings.grb_cache_ttl_hours <= 0:
+            return None
+        candidates = (
+            db.query(Dataset)
+            .filter(
+                Dataset.project_id == project_id,
+                Dataset.source_name == GrbAcquisitionService.PROVIDER,
+                Dataset.reference_layer_name == product.reference_layer_name,
+                Dataset.status == "ready",
+            )
+            .order_by(Dataset.imported_at.desc())
+            .all()
+        )
+        cutoff = datetime.now(UTC) - timedelta(hours=settings.grb_cache_ttl_hours)
+        for candidate in candidates:
+            provenance = candidate.provenance_metadata if isinstance(candidate.provenance_metadata, dict) else {}
+            imported_at = candidate.imported_at
+            if (
+                provenance.get("request_hash") == request_hash
+                and candidate.storage_path
+                and Path(candidate.storage_path).is_file()
+                and imported_at is not None
+                and imported_at >= cutoff
+            ):
+                return candidate
+        return None
+
+    @staticmethod
+    def _result(
+        dataset: Dataset,
+        product: GrbProduct,
+        *,
+        reused: bool,
+        bbox_values: list[float],
+    ) -> dict[str, Any]:
+        source_metadata = dataset.source_metadata if isinstance(dataset.source_metadata, dict) else {}
+        provenance = dataset.provenance_metadata if isinstance(dataset.provenance_metadata, dict) else {}
+        metadata = dataset.metadata_json if isinstance(dataset.metadata_json, dict) else {}
+        return GrbAcquisitionResult(
+            output_dataset_id=dataset.id,
+            reused=reused,
+            provider=GrbAcquisitionService.PROVIDER,
+            product_key=product.key,
+            display_name=product.display_name,
+            reference_layer_name=product.reference_layer_name,
+            collections=[collection.name for collection in product.collections],
+            feature_count=int(metadata.get("feature_count", source_metadata.get("feature_count", 0))),
+            candidate_feature_count=int(provenance.get("candidate_feature_count", 0)),
+            page_count=int(provenance.get("page_count", 0)),
+            bbox_epsg4326=bbox_values,
+            source_version=str(dataset.source_version or ""),
+            attribution=GrbAcquisitionService.ATTRIBUTION,
+            limitation_message=product.limitation_message,
+        ).model_dump(mode="json")
+
+    @staticmethod
+    def acquire(
+        db,
+        project_id: UUID,
+        payload: GrbAcquireRequest,
+        *,
+        settings: Settings | None = None,
+        opener: Callable[..., Any] | None = None,
+    ) -> dict[str, Any]:
+        resolved_settings = settings or get_settings()
+        product = GrbAcquisitionService._product(payload.product_key)
+        scope_geometry, bbox_values, metric_bounds = GrbAcquisitionService._validate_scope(
+            db,
+            project_id,
+            payload,
+            resolved_settings,
+        )
+        request_identity = {
+            "provider": GrbAcquisitionService.PROVIDER,
+            "product_key": product.key,
+            "bbox_epsg4326": [round(value, 8) for value in bbox_values],
+            "area_id": str(payload.area_id) if payload.area_id else None,
+        }
+        request_hash = hashlib.sha256(json.dumps(request_identity, sort_keys=True).encode()).hexdigest()
+        if not payload.force_refresh:
+            cached = GrbAcquisitionService._cached_dataset(
+                db,
+                project_id,
+                product,
+                request_hash,
+                resolved_settings,
+            )
+            if cached is not None:
+                return GrbAcquisitionService._result(cached, product, reused=True, bbox_values=bbox_values)
+
+        area = db.get(Area, payload.area_id) if payload.area_id else None
+        coverage_scope = (
+            "municipality"
+            if area is not None and area.name.strip().lower().startswith("gemeente ")
+            else "bounded_selection"
+        )
+        features, transfer = GrbAcquisitionService._fetch_features(
+            product,
+            scope_geometry,
+            tuple(scope_geometry.bounds),
+            coverage_scope,
+            resolved_settings,
+            opener,
+        )
+        acquired_at = datetime.now(UTC)
+        source_version = acquired_at.date().isoformat()
+        feature_collection = {
+            "type": "FeatureCollection",
+            "name": product.display_name,
+            "crs": {"type": "name", "properties": {"name": "EPSG:4326"}},
+            "features": features,
+        }
+        artifact = json.dumps(feature_collection, ensure_ascii=False, separators=(",", ":")).encode("utf-8")
+        filename = f"grb_{product.key}_{source_version}_{request_hash[:12]}.geojson"
+        source_metadata: dict[str, Any] = {
+            "provider": "Digitaal Vlaanderen",
+            "service": "OGC API Features",
+            "product_key": product.key,
+            "product_display_name": product.display_name,
+            "collections": [collection.name for collection in product.collections],
+            "authority_level": GrbAcquisitionService.AUTHORITY_LEVEL,
+            "theme": product.key,
+            "layer_type": product.layer_type,
+            "coverage_scope": coverage_scope,
+            "geometry_clipped_to_area": payload.area_id is not None,
+            "geometry_clipped_to_selection": True,
+            "bbox_epsg4326": bbox_values,
+            "bbox_epsg31370": metric_bounds,
+            "feature_count": len(features),
+            "collection_feature_counts": transfer["collection_feature_counts"],
+            "identity_stable": True,
+            "identity_scheme": "grb_ogc_feature_id",
+            "source_storage_crs": "EPSG:31370",
+            "requested_output_crs": GrbAcquisitionService.OGC_CRS84_URI,
+            "selection_aggregation": {
+                "metric_key": product.metric_key,
+                "method": product.metric_method,
+                "label": product.metric_label,
+                "unit": product.metric_unit,
+                "geometry_dimension": product.metric_dimension,
+                "is_estimate": False,
+                "warning": product.metric_warning,
+            },
+            "attribution": GrbAcquisitionService.ATTRIBUTION,
+            "license_note": GrbAcquisitionService.LICENSE_NOTE,
+            "catalog_url": GrbAcquisitionService.CATALOG_URL,
+            "limitation_message": product.limitation_message,
+        }
+        if product.key == "water":
+            source_metadata["selection_metrics"] = [
+                {
+                    "metric_key": "water_length",
+                    "method": "intersection_length",
+                    "label": "Lengte watergerelateerde lijnen",
+                    "unit": "km",
+                    "geometry_dimension": 1,
+                    "is_estimate": False,
+                }
+            ]
+        try:
+            dataset_response = DatasetService.import_vector_bytes(
+                db,
+                project_id=project_id,
+                area_id=payload.area_id,
+                filename=filename,
+                content=artifact,
+                source="Digitaal Vlaanderen GRB OGC API Features",
+                source_name=GrbAcquisitionService.PROVIDER,
+                dataset_role="reference",
+                reference_layer_name=product.reference_layer_name,
+                temporal_series_key=f"grb:{product.key}:{request_hash[:24]}",
+                observed_at=datetime(
+                    acquired_at.year,
+                    acquired_at.month,
+                    acquired_at.day,
+                    tzinfo=UTC,
+                ),
+                temporal_granularity="snapshot",
+                source_version=source_version,
+                source_metadata=source_metadata,
+                provenance_metadata={
+                    "acquisition": "explicit_bounded_ogc_api_features",
+                    "acquired_at": acquired_at.isoformat(),
+                    "request_hash": request_hash,
+                    "request_urls": transfer["request_urls"],
+                    "response_sha256": transfer["response_sha256"],
+                    "response_size_bytes": transfer["response_size_bytes"],
+                    "page_count": transfer["page_count"],
+                    "candidate_feature_count": transfer["candidate_feature_count"],
+                    "exact_feature_count": transfer["feature_count"],
+                    "reference_truncated": False,
+                    "artifact_sha256": hashlib.sha256(artifact).hexdigest(),
+                    "clipped_to_area_id": str(payload.area_id) if payload.area_id else None,
+                    "scope_geometry_type": scope_geometry.geom_type,
+                    "limitation_message": product.limitation_message,
+                },
+            )
+        except AppError:
+            raise
+        except Exception as exc:
+            raise AppError(
+                code="GRB_PERSISTENCE_FAILED",
+                message="The validated GRB selection could not be persisted",
+                details={"reason": str(exc)},
+                status_code=500,
+            ) from exc
+        persisted = db.get(Dataset, dataset_response.id)
+        if persisted is None:
+            raise AppError(
+                code="GRB_PERSISTENCE_FAILED",
+                message="The persisted GRB dataset could not be reloaded",
+                status_code=500,
+            )
+        return GrbAcquisitionService._result(persisted, product, reused=False, bbox_values=bbox_values)

backend/tests/test_sprint118_yolo_preflight_ui.py

@@ -54,4 +54,5 @@ def test_detection_lab_surfaces_local_model_asset_selection() -> None:
     assert "onSelectModelAsset" in lab
     assert "modelAssets={modelAssets}" in app
     assert "Officiële referentiebronnen" in provider_panel
-    assert "live GRB- en OSM-koppelingen staan uit" in provider_panel
+    assert "GRB is beschikbaar voor expliciet begrensde kaartselecties" in provider_panel
+    assert "OSM blijft uitgeschakeld" in provider_panel

backend/tests/test_sprint237_flanders_thematic_on_demand.py

@@ -10,12 +10,12 @@ def read(path: str) -> str:
 
 def test_flanders_workspace_exposes_governed_thematic_products_on_demand() -> None:
     workspace = read("frontend/src/components/map/MapWorkspace.tsx")
-    product_hook = read("frontend/src/hooks/useOfficialRasterProducts.ts")
+    product_hook = read("frontend/src/hooks/useOfficialMapProducts.ts")
     selection_hook = read("frontend/src/hooks/useMapThemeSelectionInsights.ts")
     api = read("frontend/src/services/api/datasets.ts")
 
     assert "activeScopeProject?.name === FLANDERS_WORKSPACE_PROJECT_NAME" in workspace
-    assert "new Map<DataThemeId, OnDemandRasterProduct>" in workspace
+    assert "new Map<DataThemeId, OnDemandMapProduct>" in workspace
     assert "'Op aanvraag'" in workspace
     assert "theme.id === 'space_occupation'" in workspace
     assert "setActiveThemeId(fallbackTheme.id)" in workspace
@@ -36,23 +36,23 @@ def test_selection_runs_all_available_themes_and_refreshes_persisted_datasets()
 
     assert "for (const theme of DATA_THEMES)" in workspace
     assert "await loadThemeInsights(bbox, availableThemes, areaId)" in workspace
-    assert "!regionalPartitionedThemeActive && !onDemandRasterThemeActive" in workspace
+    assert "!regionalPartitionedThemeActive && !onDemandThemeActive" in workspace
     assert "onRefreshProjectData" in workspace
     assert "selectedProjectId ? loadProjectData(selectedProjectId)" in app
     assert "successful.some((item) => item.acquisition)" in selection_hook
     assert "await onDatasetsChanged()" in selection_hook
 
 
-def test_regional_on_demand_rasters_require_a_bounded_drawn_selection() -> None:
+def test_regional_on_demand_sources_require_a_bounded_drawn_selection() -> None:
     workspace = read("frontend/src/components/map/MapWorkspace.tsx")
 
-    assert "regionalOnDemandRasterThemeActive" in workspace
+    assert "regionalOnDemandThemeActive" in workspace
-    assert "regionalRasterThemeActive || regionalOnDemandRasterThemeActive" in workspace
+    assert "regionalRasterThemeActive || regionalOnDemandThemeActive" in workspace
-    assert "Teken een begrensde rechthoek voor een regionale rasteranalyse." in workspace
+    assert "Teken een begrensde rechthoek voor deze regionale analyse." in workspace
-    assert "officiële Vlaamse rasters worden begrensd opgehaald, bewaard en hergebruikt" in workspace
+    assert "Vlaamse kaartbronnen worden begrensd opgehaald, bewaard en hergebruikt" in workspace
 
 
-def test_frontend_does_not_contact_the_external_wcs_directly() -> None:
+def test_frontend_does_not_contact_external_map_services_directly() -> None:
     frontend_sources = "\n".join(
         path.read_text(encoding="utf-8")
         for path in (ROOT / "frontend/src").rglob("*")
@@ -60,4 +60,5 @@ def test_frontend_does_not_contact_the_external_wcs_directly() -> None:
     )
 
     assert "mercatornet.be" not in frontend_sources.casefold()
+    assert "geo.api.vlaanderen.be" not in frontend_sources.casefold()
     assert "GetCoverage" not in frontend_sources

backend/tests/test_sprint238_flanders_raster_catalogs.py

@@ -11,12 +11,13 @@ def read(path: str) -> str:
     return (ROOT / path).read_text(encoding="utf-8")
 
 
-def test_official_raster_catalog_hook_loads_all_governed_registries() -> None:
+def test_official_map_catalog_hook_loads_all_governed_registries() -> None:
-    hook = read("frontend/src/hooks/useOfficialRasterProducts.ts")
+    hook = read("frontend/src/hooks/useOfficialMapProducts.ts")
 
     assert "datasetsApi.listThematicRasterProducts" in hook
     assert "datasetsApi.listDhmvProducts" in hook
     assert "datasetsApi.listFloodHazardProducts" in hook
+    assert "datasetsApi.listGrbProducts" in hook
     assert "Promise.all([" in hook
 
 
@@ -24,7 +25,7 @@ def test_map_selection_can_acquire_dhmv_and_flood_hazard_products() -> None:
     selection_hook = read("frontend/src/hooks/useMapThemeSelectionInsights.ts")
     workspace = read("frontend/src/components/map/MapWorkspace.tsx")
 
-    assert "'thematic_raster' | 'dhmv' | 'flood_hazard'" in selection_hook
+    assert "'thematic_raster' | 'dhmv' | 'flood_hazard' | 'grb'" in selection_hook
     assert "datasetsApi.acquireDhmv" in selection_hook
     assert "datasetsApi.acquireFloodHazard" in selection_hook
     assert "datasetsApi.acquireThematicRaster" in selection_hook

backend/tests/test_sprint239_bounded_grb_acquisition.py

@@ -0,0 +1,392 @@
+from __future__ import annotations
+
+import json
+from pathlib import Path
+from types import SimpleNamespace
+from urllib.parse import parse_qs, urlparse
+from uuid import uuid4
+
+import pytest
+from fastapi.testclient import TestClient
+from geoalchemy2.shape import from_shape
+from shapely.geometry import MultiPolygon, Polygon
+
+from app.core.config import Settings
+from app.core.errors import AppError
+from app.db.session import get_db
+from app.main import app
+from app.models import Area, Dataset, Job, Project
+from app.schemas.grb import GrbAcquireRequest
+from app.services.dataset_service import DatasetService
+from app.services.grb_acquisition_service import GrbAcquisitionService
+
+
+ROOT = Path(__file__).resolve().parents[2]
+
+
+class FakeQuery:
+    def __init__(self, result=None):
+        self.result = result
+
+    def filter(self, *_args):
+        return self
+
+    def order_by(self, *_args):
+        return self
+
+    def all(self):
+        return self.result if isinstance(self.result, list) else []
+
+
+class FakeSession:
+    def __init__(self, rows=None, query_result=None):
+        self.rows = rows or {}
+        self.query_result = query_result
+        self.added = []
+
+    def get(self, model, row_id):
+        row = self.rows.get((model, row_id))
+        if row is not None:
+            return row
+        return next((item for item in self.added if isinstance(item, model) and item.id == row_id), None)
+
+    def add(self, row):
+        self.added.append(row)
+
+    def commit(self):
+        return None
+
+    def rollback(self):
+        return None
+
+    def refresh(self, row):
+        return row
+
+    def query(self, _model):
+        return FakeQuery(self.query_result)
+
+
+class JsonResponse:
+    def __init__(self, payload):
+        self.content = json.dumps(payload).encode("utf-8")
+
+    def __enter__(self):
+        return self
+
+    def __exit__(self, *_args):
+        return False
+
+    def read(self, size=-1):
+        return self.content if size < 0 else self.content[:size]
+
+
+def request(*, product_key="buildings", area_id=None, force_refresh=True) -> GrbAcquireRequest:
+    return GrbAcquireRequest(
+        bbox={
+            "min_x": 5.15,
+            "min_y": 51.18,
+            "max_x": 5.17,
+            "max_y": 51.20,
+            "crs": "EPSG:4326",
+        },
+        area_id=area_id,
+        product_key=product_key,
+        force_refresh=force_refresh,
+    )
+
+
+def polygon_feature(feature_id: str, coordinates) -> dict:
+    return {
+        "type": "Feature",
+        "id": feature_id,
+        "geometry": {"type": "Polygon", "coordinates": [coordinates]},
+        "properties": {"source_field": feature_id},
+    }
+
+
+def test_grb_registry_exposes_four_governed_products() -> None:
+    products = {item["key"]: item for item in GrbAcquisitionService.list_products()}
+
+    assert set(products) == {"buildings", "roads", "water", "parcels"}
+    assert products["buildings"]["collections"] == ["GBG"]
+    assert products["roads"]["collections"] == ["Wegsegment"]
+    assert products["water"]["collections"] == ["WTZ", "WLAS", "WGR"]
+    assert products["parcels"]["collections"] == ["ADP"]
+    assert all(item["authority_level"] == "authoritative" for item in products.values())
+
+
+def test_grb_fetch_follows_pagination_clips_geometry_and_preserves_official_identity() -> None:
+    product = GrbAcquisitionService._product("buildings")
+    settings = Settings(_env_file=None)
+    pages = []
+
+    first = polygon_feature(
+        "GBG.1",
+        [(5.155, 51.185), (5.175, 51.185), (5.175, 51.195), (5.155, 51.195), (5.155, 51.185)],
+    )
+    second = polygon_feature(
+        "GBG.2",
+        [(5.151, 51.181), (5.152, 51.181), (5.152, 51.182), (5.151, 51.182), (5.151, 51.181)],
+    )
+    outside = polygon_feature(
+        "GBG.3",
+        [(5.3, 51.3), (5.31, 51.3), (5.31, 51.31), (5.3, 51.31), (5.3, 51.3)],
+    )
+
+    def opener(raw_request, timeout):
+        assert timeout == settings.grb_timeout_seconds
+        parsed = urlparse(raw_request.full_url)
+        query = parse_qs(parsed.query)
+        pages.append(raw_request.full_url)
+        assert query["bbox-crs"] == [GrbAcquisitionService.OGC_CRS84_URI]
+        assert query["crs"] == [GrbAcquisitionService.OGC_CRS84_URI]
+        if query.get("cursor") == ["next"]:
+            return JsonResponse({"type": "FeatureCollection", "features": [second, outside], "links": []})
+        return JsonResponse(
+            {
+                "type": "FeatureCollection",
+                "features": [first],
+                "links": [
+                    {
+                        "rel": "next",
+                        "href": (
+                            "https://geo.api.vlaanderen.be/GRB/ogc/features/v1/"
+                            "collections/GBG/items?cursor=next"
+                        ),
+                    }
+                ],
+            }
+        )
+
+    scope = Polygon(
+        [(5.15, 51.18), (5.17, 51.18), (5.17, 51.20), (5.15, 51.20), (5.15, 51.18)]
+    )
+    features, transfer = GrbAcquisitionService._fetch_features(
+        product,
+        scope,
+        scope.bounds,
+        "bounded_selection",
+        settings,
+        opener,
+    )
+
+    assert len(pages) == 2
+    assert transfer["page_count"] == 2
+    assert transfer["candidate_feature_count"] == 3
+    assert transfer["feature_count"] == 2
+    assert transfer["reference_truncated"] is False
+    assert {feature["id"] for feature in features} == {"GBG:GBG.1", "GBG:GBG.2"}
+    clipped = next(feature for feature in features if feature["id"] == "GBG:GBG.1")
+    assert clipped["properties"]["source_feature_id"] == "GBG:GBG.1"
+    assert clipped["properties"]["geometry_clipped_to_selection"] is True
+    assert clipped["properties"]["coverage_scope"] == "bounded_selection"
+
+
+def test_grb_fetch_rejects_untrusted_pagination_and_unbounded_feature_volume() -> None:
+    product = GrbAcquisitionService._product("buildings")
+    settings = Settings(_env_file=None)
+    feature = polygon_feature(
+        "GBG.1",
+        [(5.151, 51.181), (5.152, 51.181), (5.152, 51.182), (5.151, 51.182), (5.151, 51.181)],
+    )
+    scope = Polygon(
+        [(5.15, 51.18), (5.17, 51.18), (5.17, 51.20), (5.15, 51.20), (5.15, 51.18)]
+    )
+
+    def hostile_opener(_request, timeout):
+        del timeout
+        return JsonResponse(
+            {
+                "type": "FeatureCollection",
+                "features": [feature],
+                "links": [{"rel": "next", "href": "https://example.test/private"}],
+            }
+        )
+
+    with pytest.raises(AppError) as invalid_next:
+        GrbAcquisitionService._fetch_features(
+            product,
+            scope,
+            scope.bounds,
+            "bounded_selection",
+            settings,
+            hostile_opener,
+        )
+    assert invalid_next.value.code == "GRB_PROVIDER_INVALID_PAGINATION"
+
+    def oversized_opener(_request, timeout):
+        del timeout
+        return JsonResponse(
+            {
+                "type": "FeatureCollection",
+                "features": [
+                    feature,
+                    {**feature, "id": "GBG.2"},
+                ],
+                "links": [],
+            }
+        )
+
+    with pytest.raises(AppError) as oversized:
+        GrbAcquisitionService._fetch_features(
+            product,
+            scope,
+            scope.bounds,
+            "bounded_selection",
+            Settings(_env_file=None, GRB_MAX_FEATURES=1),
+            oversized_opener,
+        )
+    assert oversized.value.code == "GRB_SELECTION_TOO_LARGE"
+
+
+def test_grb_acquisition_rejects_large_scope_before_network_access() -> None:
+    project_id = uuid4()
+    db = FakeSession({(Project, project_id): Project(id=project_id, name="Vlaanderen")})
+    payload = GrbAcquireRequest(
+        bbox={"min_x": 4.0, "min_y": 50.7, "max_x": 5.0, "max_y": 51.7, "crs": "EPSG:4326"},
+        product_key="buildings",
+    )
+
+    with pytest.raises(AppError) as exc_info:
+        GrbAcquisitionService.acquire(db, project_id, payload, settings=Settings(_env_file=None))
+
+    assert exc_info.value.code == "GRB_SELECTION_TOO_LARGE"
+
+
+def test_grb_acquisition_persists_via_dataset_service_with_selection_metrics(monkeypatch) -> None:
+    project_id, area_id, dataset_id = uuid4(), uuid4(), uuid4()
+    municipality = MultiPolygon(
+        [
+            Polygon(
+                [(5.15, 51.18), (5.17, 51.18), (5.17, 51.20), (5.15, 51.20), (5.15, 51.18)]
+            )
+        ]
+    )
+    project = Project(id=project_id, name="Vlaanderen")
+    area = Area(
+        id=area_id,
+        project_id=project_id,
+        name="Gemeente Mol - officieel",
+        geometry=from_shape(municipality, srid=4326),
+    )
+    db = FakeSession({(Project, project_id): project, (Area, area_id): area})
+    captured = {}
+
+    def opener(_request, timeout):
+        del timeout
+        parsed = urlparse(_request.full_url)
+        collection = parsed.path.split("/")[-2]
+        if collection == "WTZ":
+            features = [
+                polygon_feature(
+                    "WTZ.1",
+                    [(5.151, 51.181), (5.16, 51.181), (5.16, 51.19), (5.151, 51.19), (5.151, 51.181)],
+                )
+            ]
+        else:
+            features = []
+        return JsonResponse({"type": "FeatureCollection", "features": features, "links": []})
+
+    def persist(_db, **kwargs):
+        captured.update(kwargs)
+        dataset = Dataset(
+            id=dataset_id,
+            project_id=project_id,
+            area_id=area_id,
+            name=kwargs["filename"],
+            dataset_type="vector",
+            source=kwargs["source"],
+            dataset_role=kwargs["dataset_role"],
+            source_name=kwargs["source_name"],
+            reference_layer_name=kwargs["reference_layer_name"],
+            temporal_series_key=kwargs["temporal_series_key"],
+            observed_at=kwargs["observed_at"],
+            source_version=kwargs["source_version"],
+            source_metadata=kwargs["source_metadata"],
+            provenance_metadata=kwargs["provenance_metadata"],
+            metadata_json={"feature_count": 1},
+            status="ready",
+        )
+        db.rows[(Dataset, dataset_id)] = dataset
+        return SimpleNamespace(id=dataset_id)
+
+    monkeypatch.setattr(DatasetService, "import_vector_bytes", persist)
+    result = GrbAcquisitionService.acquire(
+        db,
+        project_id,
+        request(product_key="water", area_id=area_id),
+        settings=Settings(_env_file=None),
+        opener=opener,
+    )
+
+    assert result["output_dataset_id"] == str(dataset_id)
+    assert result["feature_count"] == 1
+    assert captured["dataset_role"] == "reference"
+    assert captured["source_name"] == "grb"
+    assert captured["reference_layer_name"] == "water"
+    assert captured["source_metadata"]["coverage_scope"] == "municipality"
+    assert captured["source_metadata"]["selection_aggregation"]["metric_key"] == "water_area"
+    assert captured["source_metadata"]["selection_metrics"][0]["metric_key"] == "water_length"
+    assert captured["provenance_metadata"]["reference_truncated"] is False
+    collection = json.loads(captured["content"])
+    assert collection["features"][0]["properties"]["coverage_scope"] == "municipality"
+
+
+def test_grb_routes_use_canonical_envelopes_and_existing_job_contract(monkeypatch) -> None:
+    project_id, dataset_id = uuid4(), uuid4()
+    db = FakeSession({(Project, project_id): Project(id=project_id, name="Mol")})
+    monkeypatch.setattr(
+        GrbAcquisitionService,
+        "acquire",
+        lambda *_args, **_kwargs: {
+            "output_dataset_id": str(dataset_id),
+            "provider": "grb",
+            "product_key": "buildings",
+            "feature_count": 2,
+        },
+    )
+    app.dependency_overrides[get_db] = lambda: db
+    try:
+        client = TestClient(app)
+        products_response = client.get(f"/api/v1/projects/{project_id}/datasets/grb/products")
+        acquire_response = client.post(
+            f"/api/v1/projects/{project_id}/datasets/grb/acquire",
+            json=request().model_dump(mode="json"),
+        )
+    finally:
+        app.dependency_overrides.clear()
+
+    assert products_response.status_code == 200
+    assert set(products_response.json()) == {"data"}
+    assert products_response.json()["data"]["total"] == 4
+    assert acquire_response.status_code == 200
+    assert set(acquire_response.json()) == {"data"}
+    assert acquire_response.json()["data"]["job_type"] == "vector.grb.acquire"
+    assert acquire_response.json()["data"]["output_dataset_id"] == str(dataset_id)
+    assert any(isinstance(item, Job) for item in db.added)
+
+
+def test_system_capabilities_reports_bounded_grb_integration() -> None:
+    response = TestClient(app).get("/api/v1/system/capabilities")
+
+    assert response.status_code == 200
+    assert response.json()["data"]["grb"] == "bounded"
+    grb = next(
+        item for item in response.json()["data"]["providers"]
+        if item["provider_name"] == "grb"
+    )
+    assert grb["status"] == "configured"
+    assert grb["fetch_signature"].endswith("/datasets/grb/acquire")
+
+
+def test_grb_frontend_and_contracts_use_only_the_governed_backend_path() -> None:
+    selection_hook = (ROOT / "frontend/src/hooks/useMapThemeSelectionInsights.ts").read_text(encoding="utf-8")
+    catalog_hook = (ROOT / "frontend/src/hooks/useOfficialMapProducts.ts").read_text(encoding="utf-8")
+    workspace = (ROOT / "frontend/src/components/map/MapWorkspace.tsx").read_text(encoding="utf-8")
+    contracts = (ROOT / "docs/API_CONTRACTS.md").read_text(encoding="utf-8")
+
+    assert "datasetsApi.acquireGrb" in selection_hook
+    assert "datasetsApi.listGrbProducts" in catalog_hook
+    assert "officialMapProducts.grb" in workspace
+    assert "/datasets/grb/acquire" in contracts
+    assert "geo.api.vlaanderen.be" not in workspace

backend/tests/test_sprint7a_persistence_foundation.py

@@ -286,10 +286,10 @@ def test_provider_capabilities_expose_sprint7a_contract() -> None:
     assert capabilities["osm"]["supported_geometry_types"] == ["Polygon", "MultiPolygon", "LineString", "MultiLineString"]
     assert capabilities["osm"]["supported_query_modes"] == ["area"]
     assert capabilities["osm"]["status"] == "not_configured"
-    assert capabilities["grb"]["supported_layers"] == ["buildings", "roads", "parcels"]
+    assert capabilities["grb"]["supported_layers"] == ["buildings", "roads", "water", "parcels"]
     assert capabilities["grb"]["supported_geometry_types"] == ["Polygon", "MultiPolygon", "LineString", "MultiLineString"]
-    assert capabilities["grb"]["supported_query_modes"] == ["area"]
+    assert capabilities["grb"]["supported_query_modes"] == ["bbox", "persisted_area"]
-    assert capabilities["grb"]["status"] == "not_configured"
+    assert capabilities["grb"]["status"] == "configured"
 
 
 def test_sprint7a_migration_declares_foundation_tables_and_indexes() -> None:

backend/tests/test_sprint7b_provider_registry.py

@@ -16,8 +16,8 @@ def test_provider_registry_lists_sprint7b_providers() -> None:
 
     assert set(providers) == {"grb", "osm", "manual", "fixture"}
     assert providers["grb"].authority_level == "authoritative"
-    assert providers["grb"].configured is False
+    assert providers["grb"].configured is True
-    assert providers["grb"].status == "not_configured"
+    assert providers["grb"].status == "configured"
     assert providers["osm"].authority_level == "contextual"
     assert providers["osm"].configured is False
     assert providers["osm"].status == "not_configured"
@@ -34,9 +34,9 @@ def test_provider_capabilities_include_required_metadata() -> None:
 
     assert grb["provider_name"] == "grb"
     assert grb["display_name"] == "GRB"
-    assert grb["supported_layers"] == ["buildings", "roads", "parcels"]
+    assert grb["supported_layers"] == ["buildings", "roads", "water", "parcels"]
     assert grb["supported_geometry_types"] == ["Polygon", "MultiPolygon", "LineString", "MultiLineString"]
-    assert grb["supported_query_modes"] == ["area"]
+    assert grb["supported_query_modes"] == ["bbox", "persisted_area"]
     assert grb["limitation_message"]
     assert grb["attribution"]
     assert grb["license_note"]
@@ -56,13 +56,13 @@ def test_provider_to_dataset_mapping_is_enforced() -> None:
     assert get_provider_dataset_mapping("osm", requested_dataset_role="reference").dataset_role == "reference"
 
 
-def test_grb_osm_import_contract_returns_not_configured_without_fetching() -> None:
+def test_grb_import_contract_requires_bounded_request_and_osm_remains_not_configured() -> None:
     grb = import_provider_dataset("grb", project_id="project", area_id="area", layers=["buildings"])
     osm = import_provider_dataset("osm", project_id="project", area_id="area", layers=["buildings"])
 
-    assert grb.status == "not_configured"
+    assert grb.status == "bounded_request_required"
     assert grb.dataset_id is None
-    assert "No live" in grb.message
+    assert "bounding box" in grb.message
     assert osm.status == "not_configured"
     assert osm.dataset_id is None
 
@@ -107,7 +107,7 @@ def test_provider_api_envelopes_and_invalid_provider() -> None:
     assert invalid_response.json()["message"] == "Provider not found"
 
 
-def test_provider_import_api_returns_clear_not_configured_response() -> None:
+def test_provider_import_api_points_grb_to_governed_bounded_endpoint() -> None:
     client = TestClient(app)
 
     response = client.post(
@@ -121,7 +121,7 @@ def test_provider_import_api_returns_clear_not_configured_response() -> None:
 
     assert response.status_code == 200
     assert response.json()["data"]["provider_name"] == "grb"
-    assert response.json()["data"]["status"] == "not_configured"
+    assert response.json()["data"]["status"] == "bounded_request_required"
     assert response.json()["data"]["dataset_id"] is None
 
 

docker-compose.unraid.yml

@@ -27,6 +27,17 @@ services:
       ORTHOPHOTO_CACHE_TTL_HOURS: ${ORTHOPHOTO_CACHE_TTL_HOURS:-24}
       SOURCE_CATALOG_PROBE_ENABLED: ${SOURCE_CATALOG_PROBE_ENABLED:-true}
       SOURCE_CATALOG_GRB_WFS_URL: ${SOURCE_CATALOG_GRB_WFS_URL:-https://geo.api.vlaanderen.be/GRB/wfs}
+      GRB_ENABLED: ${GRB_ENABLED:-true}
+      GRB_OGC_API_URL: ${GRB_OGC_API_URL:-https://geo.api.vlaanderen.be/GRB/ogc/features/v1}
+      GRB_MIN_SIDE_M: ${GRB_MIN_SIDE_M:-10}
+      GRB_MAX_SIDE_M: ${GRB_MAX_SIDE_M:-20000}
+      GRB_PAGE_SIZE: ${GRB_PAGE_SIZE:-1000}
+      GRB_MAX_PAGES: ${GRB_MAX_PAGES:-200}
+      GRB_MAX_FEATURES: ${GRB_MAX_FEATURES:-150000}
+      GRB_TIMEOUT_SECONDS: ${GRB_TIMEOUT_SECONDS:-180}
+      GRB_MAX_RESPONSE_MB: ${GRB_MAX_RESPONSE_MB:-20}
+      GRB_MAX_TOTAL_RESPONSE_MB: ${GRB_MAX_TOTAL_RESPONSE_MB:-256}
+      GRB_CACHE_TTL_HOURS: ${GRB_CACHE_TTL_HOURS:-24}
       SOURCE_CATALOG_PROBE_TIMEOUT_SECONDS: ${SOURCE_CATALOG_PROBE_TIMEOUT_SECONDS:-10}
       SOURCE_CATALOG_PROBE_MAX_RESPONSE_MB: ${SOURCE_CATALOG_PROBE_MAX_RESPONSE_MB:-2}
       SOURCE_CATALOG_PROBE_CACHE_TTL_SECONDS: ${SOURCE_CATALOG_PROBE_CACHE_TTL_SECONDS:-900}

docker-compose.yml

@@ -32,6 +32,17 @@ services:
       ORTHOPHOTO_CACHE_TTL_HOURS: ${ORTHOPHOTO_CACHE_TTL_HOURS:-24}
       SOURCE_CATALOG_PROBE_ENABLED: ${SOURCE_CATALOG_PROBE_ENABLED:-true}
       SOURCE_CATALOG_GRB_WFS_URL: ${SOURCE_CATALOG_GRB_WFS_URL:-https://geo.api.vlaanderen.be/GRB/wfs}
+      GRB_ENABLED: ${GRB_ENABLED:-true}
+      GRB_OGC_API_URL: ${GRB_OGC_API_URL:-https://geo.api.vlaanderen.be/GRB/ogc/features/v1}
+      GRB_MIN_SIDE_M: ${GRB_MIN_SIDE_M:-10}
+      GRB_MAX_SIDE_M: ${GRB_MAX_SIDE_M:-20000}
+      GRB_PAGE_SIZE: ${GRB_PAGE_SIZE:-1000}
+      GRB_MAX_PAGES: ${GRB_MAX_PAGES:-200}
+      GRB_MAX_FEATURES: ${GRB_MAX_FEATURES:-150000}
+      GRB_TIMEOUT_SECONDS: ${GRB_TIMEOUT_SECONDS:-180}
+      GRB_MAX_RESPONSE_MB: ${GRB_MAX_RESPONSE_MB:-20}
+      GRB_MAX_TOTAL_RESPONSE_MB: ${GRB_MAX_TOTAL_RESPONSE_MB:-256}
+      GRB_CACHE_TTL_HOURS: ${GRB_CACHE_TTL_HOURS:-24}
       SOURCE_CATALOG_STATBEL_DCAT_URL: ${SOURCE_CATALOG_STATBEL_DCAT_URL:-https://doc.statbel.be/publications/DCAT/DCAT_opendata_datasets.ttl}
       SOURCE_CATALOG_STATBEL_MAX_RESPONSE_MB: ${SOURCE_CATALOG_STATBEL_MAX_RESPONSE_MB:-5}
       SOURCE_CATALOG_ALZ_RELEASE_URL: ${SOURCE_CATALOG_ALZ_RELEASE_URL:-https://landbouwcijfers.vlaanderen.be/open-geodata-landbouwgebruikspercelen}

docs/API_CONTRACTS.md

@@ -64,23 +64,23 @@ Returns enabled feature flags and tool availability.
   "geopandas": true,
   "yolo": false,
   "sam": false,
-  "grb": "planned",
+  "grb": "bounded",
   "sentinel": "planned",
   "providers": [
     {
       "provider_name": "grb",
       "display_name": "GRB",
       "authority_level": "authoritative",
-      "supported_layers": ["buildings", "roads", "parcels"],
+      "supported_layers": ["buildings", "roads", "water", "parcels"],
       "supported_geometry_types": ["Polygon", "MultiPolygon", "LineString", "MultiLineString"],
-      "supported_query_modes": ["area"],
+      "supported_query_modes": ["bbox", "persisted_area"],
-      "fetch_signature": "POST /api/v1/external/grb/fetch",
+      "fetch_signature": "POST /api/v1/projects/{project_id}/datasets/grb/acquire",
-      "configured": false,
+      "configured": true,
-      "status": "not_configured",
+      "status": "configured",
-      "limitation_message": "GRB live WFS/download integration is not configured in Sprint 7B.",
+      "limitation_message": "Alleen expliciet begrensde selecties tot 20 km per zijde worden opgehaald.",
-      "attribution": "Digitaal Vlaanderen - Basiskaart Vlaanderen (GRB)",
+      "attribution": "Bron: Grootschalig Referentie Bestand Vlaanderen, Digitaal Vlaanderen",
-      "license_note": "Use must follow Digitaal Vlaanderen open data and attribution terms.",
+      "license_note": "Hergebruik volgens de open-datavoorwaarden en bronvermelding van Digitaal Vlaanderen.",
-      "not_configured_reason": "Provider integration is not configured yet"
+      "not_configured_reason": null
     }
   ]
 }
@@ -233,6 +233,45 @@ dimensions, EPSG:4326/EPSG:31370 bounds, sampling resolution, attribution,
 cache reuse and limitation text. Historical products also persist their
 observation/validity period and a spatially scoped temporal-series key.
 
+### GET `/api/v1/projects/{project_id}/datasets/grb/products`
+
+Returns the fixed official GRB vector registry in the canonical envelope.
+Only `buildings` (`GBG`), `roads` (`Wegsegment`), `water`
+(`WTZ`/`WLAS`/`WGR`) and `parcels` (`ADP`) are exposed. Each product reports
+its exact source collections, supported geometry types, attribution, licence
+and semantic limitation.
+
+### POST `/api/v1/projects/{project_id}/datasets/grb/acquire`
+
+Acquires one explicitly bounded GRB product from the allowlisted Digitaal
+Vlaanderen OGC API Features service behind the synchronous Job abstraction:
+
+```json
+{
+  "bbox": {"min_x": 5.12, "min_y": 51.18, "max_x": 5.17, "max_y": 51.22, "crs": "EPSG:4326"},
+  "area_id": "optional-project-area-uuid",
+  "product_key": "buildings",
+  "force_refresh": false
+}
+```
+
+The backend requires EPSG:4326, intersects the rectangle with the optional
+persisted Area, rejects sides below 10 m or above 20 km, follows only
+same-host allowlisted collection pagination and fails instead of truncating
+when page, transfer or feature limits are reached. Every official feature id,
+request URL, response checksum and artifact checksum remains provenance.
+Although GRB is stored natively in EPSG:31370, the service explicitly
+negotiates OGC CRS84 longitude/latitude GeoJSON for both bbox and output before
+performing the exact geometry intersection.
+
+Output is an ordinary reference Dataset persisted through `DatasetService`,
+`DatasetVersion` and `VectorFeatureService`; providers never write directly
+to `vector_features`. Exact requests are reused for 24 hours unless
+`force_refresh=true`. Selection metrics are footprint hectares for buildings,
+line kilometres for roads, hectares plus supporting line kilometres for
+water, and hectares for parcels. Water volume is unsupported because GRB
+contains no depth or bathymetry.
+
 ### GET `/api/v1/projects/{project_id}/datasets/dhmv/products`
 
 Returns the fixed official DHMV II product registry in the canonical envelope.
@@ -898,7 +937,8 @@ Returns configured/status/limitation fields.
 
 ### POST `/api/v1/external/providers/{provider_name}/import`
 
-Defines the future provider import contract. Sprint 7B does not perform live imports or write datasets.
+Compatibility contract for provider-specific import flows. It never writes
+datasets itself.
 
 Request:
 
@@ -911,13 +951,13 @@ Request:
 }
 ```
 
-GRB/OSM response:
+GRB response:
 
 ```json
 {
   "provider_name": "grb",
-  "status": "not_configured",
+  "status": "bounded_request_required",
-  "message": "No live GRB import is configured in Sprint 7B.",
+  "message": "Use the governed project GRB acquisition endpoint with an EPSG:4326 bounding box and one supported layer.",
   "requested_layers": ["buildings"],
   "dataset_id": null,
   "dataset_role": "reference",
@@ -925,7 +965,10 @@ GRB/OSM response:
 }
 ```
 
-Manual and fixture providers point callers to existing upload/fixture flows. No provider writes directly to `vector_features`; all future provider output must flow through `DatasetService` and `VectorFeatureService`.
+OSM still returns `not_configured`. Manual and fixture providers point callers
+to existing upload/fixture flows. No provider writes directly to
+`vector_features`; the bounded GRB integration and all future provider output
+flow through `DatasetService` and `VectorFeatureService`.
 
 ## External data fetchers
 
@@ -953,7 +996,10 @@ Request:
 }
 ```
 
-V1 may initially implement this as a service interface with a clear `not_configured` response until the exact WFS endpoint is wired.
+This legacy compatibility endpoint never fetches. It returns
+`bounded_request_required` and directs callers to
+`POST /api/v1/projects/{project_id}/datasets/grb/acquire`, where bbox, Area,
+product allowlist, limits and persistence are enforceable.
 
 Sprint 7B provider contract responses expose capabilities only. Providers must report:
 
@@ -973,7 +1019,8 @@ Sprint 7B provider contract responses expose capabilities only. Providers must r
 }
 ```
 
-No GRB WFS, OSM Overpass or provider downloads are implemented in Sprint 7B.
+No unbounded GRB WFS download or OSM Overpass integration is implemented.
+Bounded GRB OGC API Features acquisition is documented under Datasets.
 
 ## Demo workflow
 
@@ -1518,7 +1565,8 @@ GeoJSON feature properties include:
 
 Limitations:
 
-- No live GRB/OSM/Sentinel fetching.
+- Change detection itself performs no provider fetch. Bounded GRB acquisition
+  is a separate explicit Dataset operation; OSM and Sentinel remain disabled.
 - No fake object lifecycle classification.
 - No `changed` classification without durable object ids/versioning.
 - No first-class change table yet; the current output is stored in job

docs/CODEX_EXECUTION_LOG.md

@@ -10222,3 +10222,35 @@ Validation:
   (49 tests).
 - Frontend TypeScript typecheck and production build passed before the full
   release gate.
+
+## Sprint 239 - Governed bounded GRB map acquisition (2026-07-17)
+
+Implemented:
+- Added a server-allowlisted GRB OGC API Features registry for `GBG`,
+  `Wegsegment`, `WTZ`/`WLAS`/`WGR` and `ADP`, exposed as buildings, roads,
+  water and parcels.
+- Added canonical product and acquisition endpoints. Acquisition validates
+  EPSG:4326 and metric side lengths, intersects the request with the persisted
+  Area, follows only trusted pagination, fails instead of truncating and
+  retains response/artifact checksums.
+- Routed all output through the existing synchronous Job and
+  `DatasetService.import_vector_bytes` flow. The resulting reference Datasets,
+  DatasetVersions and PostGIS VectorFeatures use the same persistence boundary
+  as uploaded data.
+- Added explicit semantic selection metadata for hectares and kilometres.
+  Water volume, legal parcel certainty and traffic semantics remain
+  unsupported.
+- Extended the Flanders map product catalog with the four GRB products and
+  kept all provider traffic behind the backend.
+
+Validation:
+- Focused provider, acquisition, route-envelope and frontend contract tests
+  cover complete pagination, exact clipping, official identity, hostile next
+  links, feature limits, persistent metadata and the canonical Job response.
+- A read-only live provider probe over one small Mol rectangle returned 8
+  `GBG` buildings, 23 `Wegsegment` roads, 20 water features across
+  `WTZ`/`WLAS`/`WGR` and 96 `ADP` parcels. Every collection completed without
+  truncation using explicit OGC CRS84 bbox and output negotiation.
+- The complete readiness gate passed 943 backend tests, backend compilation,
+  the 118-route API contract audit, Alembic head `202607160001`, frontend
+  TypeScript typecheck and the production Vite build.

frontend/README.md

@@ -607,6 +607,16 @@ browser never contacts WCS directly. An exact repeat reuses the persisted
 request. A complete-Flanders raster request remains disabled by the regional
 size guard, while a complete municipality remains a valid bounded analysis.
 
+The same explicit-selection workflow exposes GRB buildings, roads, water and
+parcels. These are vector products rather than rasters: selecting a
+municipality or drawing a rectangle starts a bounded backend OGC API request,
+persists the complete clipped result and analyzes the persisted
+`vector_features`. Cards show `Op aanvraag` before first use and measured
+hectares or kilometres afterwards. Full-Flanders acquisition remains disabled
+by the 20 km side limit; users select a municipality or smaller rectangle.
+The map never calls Digitaal Vlaanderen directly and never displays a
+silently truncated reference layer.
+
 Selecting `Hoogte & reliëf` shows the source distinction before analysis:
 DTM represents terrain after removal of buildings and other objects; DSM
 represents the visible surface including buildings and vegetation. Selecting

frontend/src/components/map/MapWorkspace.tsx

@@ -2,7 +2,7 @@ import { useEffect, useMemo, useState } from 'react'
 import GeoMap from '../GeoMap'
 import type { AreaRead, DatasetCreateResponse, DetectionQaResult, MapResultExportRequest, MapViewportState, OrthophotoAcquisitionResult, OrthophotoProductRead, ProjectRead, QaComparisonResult, VectorSelectionBBox, VectorSelectionMetric, VectorSelectionResponse } from '../../types'
 import { useMapThemeSelectionInsights, type MapThemeAcquisition, type MapThemeQuery } from '../../hooks/useMapThemeSelectionInsights'
-import { useOfficialRasterProducts } from '../../hooks/useOfficialRasterProducts'
+import { useOfficialMapProducts } from '../../hooks/useOfficialMapProducts'
 import { useTemporalComparison } from '../../hooks/useTemporalComparison'
 import { getDatasetDisplayName, getDatasetSourceDisplayName } from '../../lib/datasetDisplay'
 import { TemporalTrendChart } from './TemporalTrendChart'
@@ -54,10 +54,9 @@ interface TemporalSeriesGroup {
   items: DatasetCreateResponse[]
 }
 
-interface OnDemandRasterProduct extends MapThemeAcquisition {
+interface OnDemandMapProduct extends MapThemeAcquisition {
   theme: DataThemeId
-  nativeResolutionM: number
+  availabilityLabel: string
-  referenceLabel: string
   attribution: string
   limitationMessage: string
 }
@@ -669,10 +668,10 @@ export function MapWorkspace({
     clearThemeInsights,
   } = useMapThemeSelectionInsights<DataThemeId>(selectedProjectId, onRefreshProjectData)
   const {
-    products: officialRasterProducts,
+    products: officialMapProducts,
-    loading: officialRasterProductsLoading,
+    loading: officialMapProductsLoading,
-    error: officialRasterProductsError,
+    error: officialMapProductsError,
-  } = useOfficialRasterProducts(flandersScopeSelected ? selectedProjectId : null)
+  } = useOfficialMapProducts(flandersScopeSelected ? selectedProjectId : null)
   const {
     temporalComparison,
     temporalComparisonLoading,
@@ -760,10 +759,10 @@ export function MapWorkspace({
     )
     if (selectedFloodHazard) {
       result.flood_hazard = selectedFloodHazard
-    } else if (flandersScopeSelected && officialRasterProducts.floodHazard.length > 0) {
+    } else if (flandersScopeSelected && officialMapProducts.floodHazard.length > 0) {
       result.flood_hazard = null
     }
-    if (flandersScopeSelected && officialRasterProducts.dhmv.length > 0) {
+    if (flandersScopeSelected && officialMapProducts.dhmv.length > 0) {
       result.elevation = availableMapDatasets.find(
         (dataset) =>
           dataset.source_name === 'digitaal_vlaanderen_dhmv'
@@ -776,8 +775,8 @@ export function MapWorkspace({
     availableMapDatasets,
     flandersScopeSelected,
     floodHazardDatasets,
-    officialRasterProducts.dhmv.length,
+    officialMapProducts.dhmv.length,
-    officialRasterProducts.floodHazard.length,
+    officialMapProducts.floodHazard.length,
     regionalScopeSelected,
     selectedDhmvProductKey,
     selectedFloodHazardDatasetId,
@@ -800,38 +799,47 @@ export function MapWorkspace({
     [availableMapDatasets, regionalScopeSelected, selectedMapAreaId, themeDatasetMap],
   )
   const activeTheme = DATA_THEMES.find((theme) => theme.id === activeThemeId) ?? DATA_THEMES[0]
-  const onDemandRasterProductMap = useMemo(
+  const onDemandProductMap = useMemo(
     () => {
-      const result = new Map<DataThemeId, OnDemandRasterProduct>()
+      const result = new Map<DataThemeId, OnDemandMapProduct>()
       if (!flandersScopeSelected) {
         return result
       }
-      for (const product of officialRasterProducts.thematic) {
+      for (const product of officialMapProducts.thematic) {
         result.set(product.theme, {
           kind: 'thematic_raster',
           productKey: product.key,
           displayName: product.display_name,
           theme: product.theme,
-          nativeResolutionM: product.native_resolution_m,
+          availabilityLabel: `${product.native_resolution_m} m · ${product.observation_year} · laad bij selectie`,
-          referenceLabel: String(product.observation_year),
           attribution: product.attribution,
           limitationMessage: product.limitation_message,
         })
       }
-      const dhmvProduct = officialRasterProducts.dhmv.find((product) => product.key === selectedDhmvProductKey)
+      for (const product of officialMapProducts.grb) {
+        result.set(product.key, {
+          kind: 'grb',
+          productKey: product.key,
+          displayName: product.display_name,
+          theme: product.key,
+          availabilityLabel: 'officiële vectorbron · laad bij selectie',
+          attribution: product.attribution,
+          limitationMessage: product.limitation_message,
+        })
+      }
+      const dhmvProduct = officialMapProducts.dhmv.find((product) => product.key === selectedDhmvProductKey)
       if (dhmvProduct) {
         result.set('elevation', {
           kind: 'dhmv',
           productKey: dhmvProduct.key,
           displayName: dhmvProduct.display_name,
           theme: 'elevation',
-          nativeResolutionM: dhmvProduct.native_resolution_m,
+          availabilityLabel: `${dhmvProduct.native_resolution_m} m · ${dhmvProduct.acquisition_period} · laad bij selectie`,
-          referenceLabel: dhmvProduct.acquisition_period,
           attribution: dhmvProduct.attribution,
           limitationMessage: dhmvProduct.limitation_message,
         })
       }
-      const floodProduct = officialRasterProducts.floodHazard.find(
+      const floodProduct = officialMapProducts.floodHazard.find(
         (product) => product.key === selectedFloodHazardProductKey,
       )
       if (floodProduct) {
@@ -840,8 +848,7 @@ export function MapWorkspace({
           productKey: floodProduct.key,
           displayName: floodProduct.display_name,
           theme: 'flood_hazard',
-          nativeResolutionM: floodProduct.native_resolution_m,
+          availabilityLabel: `${floodProduct.native_resolution_m} m · ${floodProduct.climate_context} · T${floodProduct.return_period_years} · laad bij selectie`,
-          referenceLabel: `${floodProduct.climate_context} · T${floodProduct.return_period_years}`,
           attribution: floodProduct.attribution,
           limitationMessage: floodProduct.limitation_message,
         })
@@ -850,12 +857,12 @@ export function MapWorkspace({
     },
     [
       flandersScopeSelected,
-      officialRasterProducts,
+      officialMapProducts,
       selectedDhmvProductKey,
       selectedFloodHazardProductKey,
     ],
   )
-  const activeOnDemandRasterProduct = onDemandRasterProductMap.get(activeTheme.id) ?? null
+  const activeOnDemandMapProduct = onDemandProductMap.get(activeTheme.id) ?? null
   const activeThemeMapStyle = DATA_THEME_MAP_STYLES[activeTheme.id]
   const analysisOverlayActive = mapContentMode === 'analysis' && analysisLayerAvailable && Boolean(mapFeatureCollection)
   const selectedOrthophotoProduct = orthophotoProducts.find((item) => item.key === selectedOrthophotoProductKey) ?? null
@@ -875,24 +882,24 @@ export function MapWorkspace({
   const regionalRasterThemeActive = regionalScopeSelected && isPartitionedRaster(activeThemeDataset)
   const regionalBathymetryThemeActive = regionalScopeSelected && isPartitionedBathymetry(activeThemeDataset)
   const regionalPartitionedThemeActive = regionalRasterThemeActive || regionalBathymetryThemeActive
-  const onDemandRasterThemeActive = analysisMode === 'current' && Boolean(activeOnDemandRasterProduct)
+  const onDemandThemeActive = analysisMode === 'current' && Boolean(activeOnDemandMapProduct)
-  const regionalOnDemandRasterThemeActive = regionalScopeSelected && onDemandRasterThemeActive
+  const regionalOnDemandThemeActive = regionalScopeSelected && onDemandThemeActive
-  const activeThemeAvailable = Boolean(activeThemeDataset) || onDemandRasterThemeActive
+  const activeThemeAvailable = Boolean(activeThemeDataset) || onDemandThemeActive
 
   useEffect(() => {
     if (
       !flandersScopeSelected
       || analysisMode !== 'current'
       || activeThemeAvailable
-      || (onDemandRasterProductMap.size === 0 && !officialRasterProductsError)
+      || (onDemandProductMap.size === 0 && !officialMapProductsError)
     ) {
       return
     }
     const fallbackTheme = DATA_THEMES.find((theme) =>
       theme.id === 'space_occupation'
-      && Boolean(themeDatasetMap[theme.id] || onDemandRasterProductMap.get(theme.id)),
+      && Boolean(themeDatasetMap[theme.id] || onDemandProductMap.get(theme.id)),
     ) ?? DATA_THEMES.find((theme) =>
-      Boolean(themeDatasetMap[theme.id] || onDemandRasterProductMap.get(theme.id)),
+      Boolean(themeDatasetMap[theme.id] || onDemandProductMap.get(theme.id)),
     )
     if (!fallbackTheme) {
       return
@@ -906,8 +913,8 @@ export function MapWorkspace({
     activeThemeAvailable,
     analysisMode,
     flandersScopeSelected,
-    officialRasterProductsError,
+    officialMapProductsError,
-    onDemandRasterProductMap,
+    onDemandProductMap,
     onOpenDatasetInMap,
     themeDatasetMap,
   ])
@@ -999,12 +1006,12 @@ export function MapWorkspace({
   useEffect(() => {
     const contextSourceLabel = analysisMode === 'evolution' ? activeTemporalSeriesGroup?.label ?? null
       : regionalBathymetryThemeActive ? 'VHA-dwarsprofielen Vlaanderen'
-      : activeOnDemandRasterProduct?.displayName ?? null
+      : activeOnDemandMapProduct?.displayName ?? null
     onSetContextSourceLabel(contextSourceLabel)
     return () => onSetContextSourceLabel(null)
   }, [
     activeTemporalSeriesGroup?.label,
-    activeOnDemandRasterProduct?.displayName,
+    activeOnDemandMapProduct?.displayName,
     analysisMode,
     onSetContextSourceLabel,
     regionalBathymetryThemeActive,
@@ -1112,7 +1119,7 @@ export function MapWorkspace({
       }
       return
     }
-    if (flandersScopeSelected && officialRasterProducts.floodHazard.length > 0) {
+    if (flandersScopeSelected && officialMapProducts.floodHazard.length > 0) {
       setSelectedFloodHazardDatasetId('')
       return
     }
@@ -1126,7 +1133,7 @@ export function MapWorkspace({
   }, [
     flandersScopeSelected,
     floodHazardDatasets,
-    officialRasterProducts.floodHazard.length,
+    officialMapProducts.floodHazard.length,
     selectedFloodHazardDatasetId,
     selectedFloodHazardProductKey,
   ])
@@ -1350,7 +1357,7 @@ export function MapWorkspace({
       ? temporalGroup?.items[temporalGroup.items.length - 1] ?? null
       : themeDatasetMap[theme.id]
     const onDemandProduct = analysisMode === 'current'
-      ? onDemandRasterProductMap.get(theme.id)
+      ? onDemandProductMap.get(theme.id)
       : null
     if (!dataset && !onDemandProduct) {
       return
@@ -1381,7 +1388,7 @@ export function MapWorkspace({
     const availableThemes: Array<MapThemeQuery<DataThemeId>> = []
     for (const theme of DATA_THEMES) {
       const onDemandProduct = analysisMode === 'current'
-        ? onDemandRasterProductMap.get(theme.id)
+        ? onDemandProductMap.get(theme.id)
         : null
       if (onDemandProduct) {
         availableThemes.push({
@@ -1410,7 +1417,7 @@ export function MapWorkspace({
   const analyzeSelection = async (bbox: VectorSelectionBBox, areaId?: string) => {
     setSelectionBbox(bbox)
     const tasks: Array<Promise<unknown>> = [loadAllThemeResults(bbox, areaId)]
-    if (!regionalPartitionedThemeActive && !onDemandRasterThemeActive) {
+    if (!regionalPartitionedThemeActive && !onDemandThemeActive) {
       tasks.push(onRunMapSelectionExtract(bbox, areaId))
     }
     if (analysisMode === 'evolution' && earlierDatasetId && laterDatasetId) {
@@ -1571,7 +1578,7 @@ export function MapWorkspace({
             <div className="geo-theme-list">
               {DATA_THEMES.map((theme) => {
                 const dataset = themeDatasetMap[theme.id]
-                const onDemandProduct = onDemandRasterProductMap.get(theme.id)
+                const onDemandProduct = onDemandProductMap.get(theme.id)
                 const partitions = themePartitionMap[theme.id]
                 const temporalGroups = themeTemporalSeriesMap[theme.id]
                 const temporalGroup = temporalGroups[0]
@@ -1603,7 +1610,7 @@ export function MapWorkspace({
                           : dataset
                             ? datasetAvailabilityLabel(dataset, partitions)
                             : onDemandProduct
-                              ? `${onDemandProduct.nativeResolutionM} m · ${onDemandProduct.referenceLabel} · laad bij selectie`
+                              ? onDemandProduct.availabilityLabel
                             : 'Bron nog niet ingeladen'}
                       </small>
                     </span>
@@ -1628,7 +1635,7 @@ export function MapWorkspace({
                     ? 'VHA-dwarsprofielen Vlaanderen'
                     : activeThemeDataset
                       ? getDatasetDisplayName(activeThemeDataset)
-                      : activeOnDemandRasterProduct?.displayName ?? 'Geen databron beschikbaar'}
+                      : activeOnDemandMapProduct?.displayName ?? 'Geen databron beschikbaar'}
               </strong>
               <small>
                 {analysisOverlayActive
@@ -1641,19 +1648,19 @@ export function MapWorkspace({
                     ? `${activeThemePartitions.length} gecontroleerde gemeentepartities · selectie wordt ruimtelijk samengevoegd`
                   : activeThemeDataset
                     ? `${getDatasetSourceDisplayName(activeThemeDataset)} · ${formatDatasetObservation(activeThemeDataset)}`
-                    : activeOnDemandRasterProduct
+                    : activeOnDemandMapProduct
-                      ? `${activeOnDemandRasterProduct.attribution} · wordt alleen voor de gekozen selectie ingeladen`
+                      ? `${activeOnDemandMapProduct.attribution} · wordt alleen voor de gekozen selectie ingeladen`
                     : activeTheme.description}
               </small>
             </div>
-            {officialRasterProductsLoading && flandersScopeSelected ? (
+            {officialMapProductsLoading && flandersScopeSelected ? (
-              <p className="geo-data-notice">Beschikbare Vlaamse rasterbronnen worden gecontroleerd…</p>
+              <p className="geo-data-notice">Beschikbare Vlaamse kaartbronnen worden gecontroleerd…</p>
             ) : null}
-            {officialRasterProductsError && flandersScopeSelected ? (
+            {officialMapProductsError && flandersScopeSelected ? (
-              <p className="error">{officialRasterProductsError}</p>
+              <p className="error">{officialMapProductsError}</p>
             ) : null}
 
-            {analysisMode === 'current' && activeTheme.id === 'elevation' && officialRasterProducts.dhmv.length > 0 ? (
+            {analysisMode === 'current' && activeTheme.id === 'elevation' && officialMapProducts.dhmv.length > 0 ? (
               <label className="geo-scope-select">
                 Hoogtemodel
                 <select
@@ -1674,7 +1681,7 @@ export function MapWorkspace({
                     }
                   }}
                 >
-                  {officialRasterProducts.dhmv.map((product) => (
+                  {officialMapProducts.dhmv.map((product) => (
                     <option key={product.key} value={product.key}>{product.display_name}</option>
                   ))}
                 </select>
@@ -1682,7 +1689,7 @@ export function MapWorkspace({
               </label>
             ) : null}
 
-            {analysisMode === 'current' && activeTheme.id === 'flood_hazard' && officialRasterProducts.floodHazard.length > 0 ? (
+            {analysisMode === 'current' && activeTheme.id === 'flood_hazard' && officialMapProducts.floodHazard.length > 0 ? (
               <label className="geo-scope-select">
                 Overstromingsscenario
                 <select
@@ -1699,7 +1706,7 @@ export function MapWorkspace({
                     }
                   }}
                 >
-                  {officialRasterProducts.floodHazard.map((product) => (
+                  {officialMapProducts.floodHazard.map((product) => (
                     <option key={product.key} value={product.key}>{product.display_name}</option>
                   ))}
                 </select>
@@ -1801,8 +1808,8 @@ export function MapWorkspace({
                       ? 'Sleep nu een rechthoek op de kaart.'
                       : regionalRasterThemeActive
                         ? 'Teken een rechthoek; de juiste gemeentelijke rasters worden automatisch gecombineerd.'
-                        : onDemandRasterThemeActive
+                        : onDemandThemeActive
-                          ? 'Teken een rechthoek; officiële Vlaamse rasters worden begrensd opgehaald, bewaard en hergebruikt.'
+                          ? 'Teken een rechthoek; officiële Vlaamse kaartbronnen worden begrensd opgehaald, bewaard en hergebruikt.'
                         : regionalBathymetryThemeActive
                           ? 'Teken een rechthoek of analyseer Vlaanderen; alleen overlappende VHA-partities worden samengevoegd.'
                         : 'Sleep een rechthoek of analyseer het volledige werkgebied.'}
@@ -1820,16 +1827,16 @@ export function MapWorkspace({
                 </button>
                 <button
                   className="secondary-action"
-                  disabled={!activeThemeAvailable || regionalRasterThemeActive || regionalOnDemandRasterThemeActive || (analysisMode === 'evolution' && activeTemporalSeries.length < 2) || !selectedAreaBbox || mapSelectionLoading || themeResultsLoading}
+                  disabled={!activeThemeAvailable || regionalRasterThemeActive || regionalOnDemandThemeActive || (analysisMode === 'evolution' && activeTemporalSeries.length < 2) || !selectedAreaBbox || mapSelectionLoading || themeResultsLoading}
                   type="button"
                   title={
-                    regionalRasterThemeActive || regionalOnDemandRasterThemeActive
+                    regionalRasterThemeActive || regionalOnDemandThemeActive
-                      ? 'Teken een begrensde rechthoek voor een regionale rasteranalyse.'
+                      ? 'Teken een begrensde rechthoek voor deze regionale analyse.'
                       : undefined
                   }
                   onClick={() => selectedAreaBbox && void analyzeSelection(selectedAreaBbox, selectedMapArea?.id)}
                 >
-                  {regionalRasterThemeActive || regionalOnDemandRasterThemeActive ? 'Selecteer een deelgebied' : 'Volledig werkgebied'}
+                  {regionalRasterThemeActive || regionalOnDemandThemeActive ? 'Selecteer een deelgebied' : 'Volledig werkgebied'}
                 </button>
                 <button className="secondary-action" disabled={!mapSelectionBbox} type="button" onClick={clearAreaSelection}>
                   Wis selectie
@@ -2198,7 +2205,7 @@ export function MapWorkspace({
                 ? `VHA-dwarsprofielen Vlaanderen · ${activeThemePartitions.length} gemeentepartities`
               : activeThemeDataset
                 ? getDatasetDisplayName(activeThemeDataset)
-                : activeOnDemandRasterProduct?.displayName
+                : activeOnDemandMapProduct?.displayName
                   ?? 'niet beschikbaar'}
           </span>
           {usesDefaultOsmBasemap ? <span><strong>Ondergrond:</strong> OpenStreetMap</span> : null}

frontend/src/components/providers/ProviderPanel.tsx

@@ -80,7 +80,8 @@ export function ProviderPanel({
           <div className="provider-detail-stack">
             <strong>Officiële referentiebronnen</strong>
             <div>
-              Reeds ingeladen GRB-lagen blijven lokaal beschikbaar. De live GRB- en OSM-koppelingen staan uit en halen dus niet ongemerkt externe gegevens op.
+              GRB is beschikbaar voor expliciet begrensde kaartselecties en wordt daarna lokaal bewaard.
+              OSM blijft uitgeschakeld; geen enkele bron haalt ongemerkt gegevens op.
             </div>
           </div>
           <ul className="system-provider-list">

frontend/src/hooks/useMapThemeSelectionInsights.ts

@@ -6,7 +6,7 @@ import { terrainSelectionToMapSelection } from '../lib/terrainSelection'
 import { floodHazardSelectionToMapSelection } from '../lib/floodHazardSelection'
 import { thematicRasterSelectionToMapSelection } from '../lib/thematicRaster'
 
-export type MapThemeAcquisitionKind = 'thematic_raster' | 'dhmv' | 'flood_hazard'
+export type MapThemeAcquisitionKind = 'thematic_raster' | 'dhmv' | 'flood_hazard' | 'grb'
 
 export interface MapThemeAcquisition {
   kind: MapThemeAcquisitionKind
@@ -72,30 +72,34 @@ export function useMapThemeSelectionInsights<TThemeId extends string>(
         queries.map(async ({ themeId, dataset: existingDataset, partitioned, acquisition }) => {
           let dataset = existingDataset
           if (acquisition) {
+            const commonPayload = {
+              bbox,
+              area_id: areaId,
+              force_refresh: false,
+            }
             const acquisitionJob = acquisition.kind === 'thematic_raster'
               ? await datasetsApi.acquireThematicRaster(selectedProjectId, {
-                  bbox,
+                  ...commonPayload,
-                  area_id: areaId,
                   product_key: acquisition.productKey,
-                  force_refresh: false,
                 })
               : acquisition.kind === 'dhmv'
                 ? await datasetsApi.acquireDhmv(selectedProjectId, {
-                    bbox,
+                    ...commonPayload,
-                    area_id: areaId,
                     product_key: acquisition.productKey as 'dtm_1m' | 'dsm_1m',
-                    force_refresh: false,
-                  })
-                : await datasetsApi.acquireFloodHazard(selectedProjectId, {
-                    bbox,
-                    area_id: areaId,
-                    product_key: acquisition.productKey,
-                    force_refresh: false,
                   })
+                : acquisition.kind === 'flood_hazard'
+                  ? await datasetsApi.acquireFloodHazard(selectedProjectId, {
+                      ...commonPayload,
+                      product_key: acquisition.productKey,
+                    })
+                  : await datasetsApi.acquireGrb(selectedProjectId, {
+                      ...commonPayload,
+                      product_key: acquisition.productKey as 'buildings' | 'roads' | 'water' | 'parcels',
+                    })
             if (acquisitionJob.status !== 'success' || !acquisitionJob.output_dataset_id) {
               throw new Error(
                 acquisitionJob.error_message
-                  || `De officiële rasterbron ${acquisition.displayName} kon niet worden ingeladen.`,
+                  || `De officiële kaartbron ${acquisition.displayName} kon niet worden ingeladen.`,
               )
             }
             dataset = await datasetsApi.get(selectedProjectId, acquisitionJob.output_dataset_id)

frontend/src/hooks/useOfficialMapProducts.ts

@@ -4,23 +4,26 @@ import { formatError } from '../lib/formatError'
 import type {
   DhmvProductRead,
   FloodHazardProductRead,
+  GrbProductRead,
   ThematicRasterProductRead,
 } from '../types'
 
-interface OfficialRasterProducts {
+interface OfficialMapProducts {
   thematic: ThematicRasterProductRead[]
   dhmv: DhmvProductRead[]
   floodHazard: FloodHazardProductRead[]
+  grb: GrbProductRead[]
 }
 
-const EMPTY_PRODUCTS: OfficialRasterProducts = {
+const EMPTY_PRODUCTS: OfficialMapProducts = {
   thematic: [],
   dhmv: [],
   floodHazard: [],
+  grb: [],
 }
 
-export function useOfficialRasterProducts(selectedProjectId: string | null) {
+export function useOfficialMapProducts(selectedProjectId: string | null) {
-  const [products, setProducts] = useState<OfficialRasterProducts>(EMPTY_PRODUCTS)
+  const [products, setProducts] = useState<OfficialMapProducts>(EMPTY_PRODUCTS)
   const [loading, setLoading] = useState(false)
   const [error, setError] = useState<string | null>(null)
 
@@ -41,20 +44,22 @@ export function useOfficialRasterProducts(selectedProjectId: string | null) {
       datasetsApi.listThematicRasterProducts(selectedProjectId),
       datasetsApi.listDhmvProducts(selectedProjectId),
       datasetsApi.listFloodHazardProducts(selectedProjectId),
+      datasetsApi.listGrbProducts(selectedProjectId),
     ])
-      .then(([thematic, dhmv, floodHazard]) => {
+      .then(([thematic, dhmv, floodHazard, grb]) => {
         if (!cancelled) {
           setProducts({
             thematic: thematic.items,
             dhmv: dhmv.items,
             floodHazard: floodHazard.items,
+            grb: grb.items,
           })
         }
       })
       .catch((requestError) => {
         if (!cancelled) {
           setProducts(EMPTY_PRODUCTS)
-          setError(formatError(requestError, 'De officiële Vlaamse rastercatalogi konden niet worden geladen.'))
+          setError(formatError(requestError, 'De officiële Vlaamse kaartcatalogi konden niet worden geladen.'))
         }
       })
       .finally(() => {

frontend/src/services/api/datasets.ts

@@ -26,6 +26,8 @@ import type {
   BathymetrySourceProbeRead,
   BathymetrySourceRead,
   DhmvProductRead,
+  GrbAcquireRequest,
+  GrbProductRead,
   TerrainSelectionResponse,
   ThematicRasterAcquireRequest,
   ThematicRasterProductRead,
@@ -146,6 +148,10 @@ export const datasetsApi = {
     apiPost<JobRead>(`/api/v1/projects/${projectId}/datasets/dhmv/acquire`, payload),
   listDhmvProducts: (projectId: string): Promise<{ items: DhmvProductRead[]; total: number }> =>
     apiGet<{ items: DhmvProductRead[]; total: number }>(`/api/v1/projects/${projectId}/datasets/dhmv/products`),
+  acquireGrb: (projectId: string, payload: GrbAcquireRequest): Promise<JobRead> =>
+    apiPost<JobRead>(`/api/v1/projects/${projectId}/datasets/grb/acquire`, payload),
+  listGrbProducts: (projectId: string): Promise<{ items: GrbProductRead[]; total: number }> =>
+    apiGet<{ items: GrbProductRead[]; total: number }>(`/api/v1/projects/${projectId}/datasets/grb/products`),
   selectTerrain: (
     projectId: string,
     datasetId: string,

frontend/src/types.ts

@@ -362,6 +362,27 @@ export interface DhmvProductRead {
   limitation_message: string
 }
 
+export interface GrbAcquireRequest {
+  bbox: VectorSelectionBBox
+  area_id?: string | null
+  product_key: 'buildings' | 'roads' | 'water' | 'parcels'
+  force_refresh?: boolean
+}
+
+export interface GrbProductRead {
+  key: 'buildings' | 'roads' | 'water' | 'parcels'
+  display_name: string
+  reference_layer_name: string
+  collections: string[]
+  geometry_types: string[]
+  source_crs: 'EPSG:4326'
+  authority_level: 'authoritative'
+  catalog_url: string
+  attribution: string
+  license_note: string
+  limitation_message: string
+}
+
 export interface TerrainSelectionResponse {
   dataset_id: string
   dataset_ids: string[]