Support bounded Kempen-wide thematic rasters

backend/README.md

@@ -1316,6 +1316,10 @@ Settings: `THEMATIC_RASTER_ENABLED`, `THEMATIC_RASTER_WCS_URL`,
 `THEMATIC_RASTER_MIN_SIDE_M`, `THEMATIC_RASTER_MAX_SIDE_M`,
 `THEMATIC_RASTER_MAX_PIXELS`, `THEMATIC_RASTER_TIMEOUT_SECONDS` and
 `THEMATIC_RASTER_MAX_RESPONSE_MB`.
+The default thematic ceiling is 60 km and 30 million cells so the exact
+Kempen work area fits. External WCS transfers remain split into fixed 10 km
+tiles, product identifiers remain server-allowlisted and other raster
+pipelines retain their smaller independent limits.
 
 Provision the official DOV soil polygons for Mol through the existing vector
 upload path:

backend/app/core/config.py

@@ -59,8 +59,8 @@ class Settings(BaseSettings):
         validation_alias="THEMATIC_RASTER_WCS_URL",
     )
     thematic_raster_min_side_m: float = Field(default=100.0, gt=0, validation_alias="THEMATIC_RASTER_MIN_SIDE_M")
-    thematic_raster_max_side_m: float = Field(default=20_000.0, gt=0, validation_alias="THEMATIC_RASTER_MAX_SIDE_M")
-    thematic_raster_max_pixels: int = Field(default=12_000_000, ge=1, validation_alias="THEMATIC_RASTER_MAX_PIXELS")
+    thematic_raster_max_side_m: float = Field(default=60_000.0, gt=0, validation_alias="THEMATIC_RASTER_MAX_SIDE_M")
+    thematic_raster_max_pixels: int = Field(default=30_000_000, ge=1, validation_alias="THEMATIC_RASTER_MAX_PIXELS")
     thematic_raster_timeout_seconds: int = Field(default=300, ge=1, validation_alias="THEMATIC_RASTER_TIMEOUT_SECONDS")
     thematic_raster_max_response_mb: int = Field(default=160, ge=1, validation_alias="THEMATIC_RASTER_MAX_RESPONSE_MB")
     redis_url: str | None = Field(default=None, validation_alias="REDIS_URL")

backend/tests/test_sprint213_thematic_rasters.py

@@ -148,6 +148,29 @@ def test_request_is_bounded_allowlisted_and_uses_native_wcs_resolution() -> None
     assert exc_info.value.code == "THEMATIC_RASTER_PRODUCT_NOT_SUPPORTED"
 
 
+def test_complete_kempen_scope_fits_the_tiled_thematic_guardrails() -> None:
+    settings = Settings(_env_file=None)
+    request = ThematicRasterAcquireRequest(
+        bbox={
+            "min_x": 4.59723873,
+            "min_y": 51.01047967,
+            "max_x": 5.26224853,
+            "max_y": 51.50511313,
+            "crs": "EPSG:4326",
+        },
+        product_key="space_occupation_2025",
+    )
+
+    prepared = ThematicRasterAcquisitionService._prepared_request(request, settings)
+
+    assert prepared["width"] * prepared["height"] <= 30_000_000
+    assert len(ThematicRasterAcquisitionService._tile_bounds(prepared)) > 1
+
+    with pytest.raises(AppError) as exc_info:
+        ThematicRasterAcquisitionService._prepared_request(payload(side_m=61_000.0), settings)
+    assert exc_info.value.code == "THEMATIC_RASTER_SELECTION_TOO_LARGE"
+
+
 def test_binary_and_normalized_products_fail_closed_on_invalid_values() -> None:
     binary = ThematicRasterAcquisitionService._product("space_occupation_2025")
     score = ThematicRasterAcquisitionService._product("service_level_2022")