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fix: align WALOUS with official class codes
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2026-07-22 04:30:54 +02:00
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@@ -790,6 +790,27 @@ Areas. They persist only through `DatasetService`; the browser never contacts
either provider directly. Cross-zone selections remain split by authority and
metric semantics.
## Wallonia WALOUS land cover
The official SPW `WAL_OCS_IA__2020` and `WAL_OCS_IA__2023` GeoTIFF archives
provide comparable Walloon land-cover observations at native 1 m resolution in
EPSG:3812. Runtime analysis reads only bounded windows from operator-
provisioned, checksum-recorded source files and uses nearest-neighbour
resampling for the governed 10 m analysis derivative.
The 11 semantic classes use the non-contiguous source codes `1, 2, 3, 4, 5, 6,
7, 8, 9, 80, 90`. In order these mean artificial ground, above-ground
construction, railway, bare soil, surface water, rotating herbaceous cover,
continuous herbaceous cover, conifer trees above 3 m, deciduous trees above 3
m, conifer woody cover up to 3 m and deciduous woody cover up to 3 m. Codes 80
and 90 must never be normalized to invented classes 10 and 11.
The official temporal extents are 2020-04-01 through 2020-04-24 and 2023-05-27
through 2023-06-25. Metrics are estimated hectares from classified cells. They
are not legal land use, ownership, individual tree counts, timber volume or
water volume. The official catalogue reports overall accuracy per edition and
also warns that accuracy varies by class and place.
## Bathymetry, inland profiles and maritime scope
The official VHA Digital Atlas profile-point layer is the first operational