62 lines
4.0 KiB
Markdown
62 lines
4.0 KiB
Markdown
# GeoIntel data coverage status
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Status date: 2026-07-22
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This document is the operational interpretation of the source registry. It
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does not replace the legal/source provenance stored with each Dataset.
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## Status labels in the workbench
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- `Beschikbaar`: a persisted Dataset covers the selection and can be queried
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immediately.
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- `Automatisch`: an audited official source contract exists. GeoIntel obtains
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and persists only the bounded selection when analysis starts.
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- `Alleen huidig`: one official observation exists, so no honest evolution can
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be calculated.
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- `Ontbreekt`: no operational source contract covers that theme and zone.
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`Automatisch` therefore does not mean unavailable or simulated. It means that
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the source is materialized on first use and reused afterwards. AI training
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cannot replace missing official GIS observations and is not used to fabricate
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coverage or historical dates.
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## Current operational coverage
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| Zone | Persisted or bounded operational sources | Historical comparison |
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| --- | --- | --- |
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| Belgium | NGI administrative boundaries; Statbel population/statistical sectors | Statbel population 2021-2025 |
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| Flanders | GRB buildings, roads, water and parcels; DHMV terrain/surface; VMM flood scenarios; BWK/Natura 2000; DOV soil; policy rasters for space, open space, accessibility and services; agriculture and orthophoto where governed | Population 2021-2025; land-use/land-cover series where retained; agriculture editions; historical maps/orthophotos where the selected product has a real observation date |
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| Wallonia | Bounded PICC buildings, roads and hydrography; legal SPW flood-hazard polygons; bounded WALOUS 2018/2020/2023 land-cover analysis; bounded SPW MNT 2021-2022 terrain analysis in DNG; governed SPW bed-elevation/bathymetry products | Governed WALOUS land-cover area metrics for 2018-2023 with the 2018 crosswalk/methodology limitation; no general cross-theme regional history yet |
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| Brussels | Bounded UrbIS buildings, street axes, cadastral parcels and Land Cover blocks; official FO/GB blocks provide forest/park area and WB blocks provide permanent water area | No general cross-theme regional history yet; the live WFS has no per-feature observation date |
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| Belgian North Sea | RBINS reporting units; Marine Spatial Plan 2026-2034; governed MDK bathymetry only when runtime acquisition is explicitly configured | No multi-epoch bathymetry or marine-plan trend yet |
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Mol and the Kempen are golden regression areas. Their persisted partitions are
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not national coverage. A partition is only selected when its recorded
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`bbox_epsg4326` intersects the drawn rectangle; otherwise GeoIntel uses an
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applicable bounded official source or reports the theme as unsupported.
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## Priority coverage gaps
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1. Add a common Belgium-wide topographic baseline with normalized theme
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semantics across NGI, Flanders, Wallonia and Brussels.
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2. Govern comparable Walloon and Brussels historical editions before exposing
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evolution for buildings, roads, land cover, soil, elevation or flood risk.
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3. Add nationally comparable land-cover history with explicit class crosswalks
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and uncertainty; never compare incompatible legends silently.
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4. Add multi-epoch marine bathymetry and survey-footprint metadata before
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presenting seabed evolution.
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5. Expand persisted raster partition manifests beyond the regression regions
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only where repeated use justifies caching; bounded acquisition remains the
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default for one-off selections.
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6. Add source freshness probes only for publishers with stable official edition
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contracts. Do not infer a new observation from an import or HTTP date.
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## Acceptance rules for a new source
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A source is visible as operational only after its licence, authority,
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observation time, CRS, spatial coverage, schema, units and limitations are
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validated. It must persist through DatasetService and the canonical feature or
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raster flow, retain provenance/checksums, return semantic metrics, and have a
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selection-level regression test. Historical support additionally requires at
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least two distinct, methodologically comparable official observation dates.
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