110 lines
4.2 KiB
Markdown
110 lines
4.2 KiB
Markdown
# Data Sources
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Dit document verzamelt concrete databronnen voor GeoIntel Kempen.
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## GRB — Basiskaart Vlaanderen
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- Naam: Basiskaart Vlaanderen / GRB
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- Beheerder: Digitaal Vlaanderen
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- Type: vector
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- Gebruik: referentiegebouwen, wegen, terreinobjecten, QA/QC
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- Toegang: WFS of download
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- Cache: PostGIS per analysegebied
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- Prioriteit: V1
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- Opmerking: belangrijkste officiële referentiebron voor QA/QC.
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### Volledige gemeente Mol
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De operationele Mol-workspace gebruikt twee expliciete Digitaal Vlaanderen
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OGC API-bronnen:
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- `VRBG/Refgem`, gefilterd op `NAAM='Mol'` en gecontroleerd op NIS-code
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`13025`, als officiële gemeentegrens.
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- `GRB/GBG`, volledig gepagineerd en exact tegen die grens gesneden, als
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gemeentebrede gebouwreferentie.
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Deze bronnen worden uitsluitend via het expliciete operatorcommando
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`scripts/provision_mol_municipality_workspace.py` opgehaald. De applicatie
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start geen verborgen providerfetch. De resulterende GeoJSON-artefacten,
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checksums en bron-URL's worden onder persistent operator storage bewaard en
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via de bestaande DatasetService/vectorfeature-flow geïmporteerd.
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### Mol population history
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`scripts/provision_mol_population_history.py` imports official Statbel
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population-by-statistical-sector tables and matching sector geometries for
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2021 through 2025. It keeps the published sector total as
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`population_total`, clips the official geometry to Mol NIS `13025` and uploads
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each year as a separate dataset in
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`statbel:population-statistical-sector:mol`.
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Complete sectors use their published population total. A rectangle that cuts
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through a sector uses an explicitly labelled area-weighted estimate; the
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source does not justify a more precise intra-sector distribution.
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### Mol historical land use
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`scripts/provision_mol_historical_landuse.py` uses the official Digitaal
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Vlaanderen Historical Land Use WFS for the 1778, 1873 and 1969 collections.
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Buildings, forest, water and roads are filtered server-side, clipped to the
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official Mol boundary and uploaded through the existing dataset service.
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Source classes, request URLs, observation year, simplification tolerance and
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methodological limitations remain in provenance.
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These historical map editions support exploratory area evolution, not
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cadastral object lineage. Their feature identities are declared unstable and
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GeoIntel does not fabricate added/removed object counts.
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## OSM
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- Naam: OpenStreetMap
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- Type: vector
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- Gebruik: fallback referentie, wegen, POI's, landuse
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- Toegang: Overpass API of lokale extracten
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- Cache: PostGIS per analysegebied
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- Prioriteit: V1 fallback
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## Sentinel-2
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- Naam: Copernicus Sentinel-2
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- Type: multispectraal raster
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- Gebruik: NDVI, NDWI, NDBI, remote sensing change detection
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- Toegang: Copernicus/STAC later te bepalen
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- Cache: raster storage + metadata in PostGIS
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- Prioriteit: V2
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## DHMV
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- Naam: Digitaal Hoogtemodel Vlaanderen
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- Type: raster/hoogte
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- Gebruik: DEM, DSM, helling, laagste punten
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- Toegang: Vlaamse open data, download/WCS nader te bepalen
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- Cache: raster storage
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- Prioriteit: V3
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## Gebouwenregister
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- Naam: Gebouwenregister Vlaanderen
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- Type: vector/API/metadata
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- Gebruik: gebouwmetadata en statusinformatie
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- Toegang: nader te bepalen
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- Cache: PostGIS/metadata tabellen
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- Prioriteit: V2
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## Lokale demo datasets
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De repo moet ruimte voorzien voor kleine samplebestanden in `tests/fixtures/` of `datasets/raw/demo/`. Grote datasets mogen niet standaard in git.
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## Sprint 7B provider registry
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Sprint 7B exposes provider metadata only. It does not perform GRB WFS calls, OSM Overpass calls, downloads, or fake data generation.
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| provider | authority_level | configured | layers | dataset mapping |
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| --- | --- | --- | --- | --- |
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| `grb` | authoritative | false | buildings, roads, parcels | `dataset_role=reference`, `source_name=grb` |
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| `osm` | contextual | false | buildings, roads, water, landuse | default `dataset_role=source`, explicit reference `dataset_role=reference`, `source_name=osm` |
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| `manual` | manual | true | uploaded user layers | `dataset_role=reference`, `source_name=manual` |
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| `fixture` | fixture | true | demo/test fixture layers | `dataset_role=reference`, `source_name=fixture` |
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Future provider output must flow through `DatasetService` and `VectorFeatureService`; providers must not write directly to `vector_features`.
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