feat: add semantic GIS selection metrics

2026-07-15 06:07:34 +02:00
parent 3ff2d07f3c
commit 0baa9b069c
16 changed files with 520 additions and 22 deletions
@@ -947,6 +947,15 @@ frontend requests at most 1,000 features for the current viewport and surfaces
 the response `truncated` flag; the backend does not provide or imply an
 unbounded municipality-wide map response.

+Selection summaries expose a primary metric plus an additive `metrics` list.
+Known persisted themes are aggregated in `EPSG:31370`: building footprints,
+forest, water surfaces and parcels return hectares; roads and linear
+watercourses return kilometres; population keeps its configured inhabitant
+aggregation. Intersecting feature counts remain available as supporting
+evidence. Water volume is deliberately unavailable because the current GRB
+source has no reliable depth/bathymetry dimension; GeoIntel does not manufacture
+volume from 2D polygons.
+
 `POST /api/v1/projects/{project_id}/datasets/{dataset_id}/vector/select/derive`
 uses the same persisted `vector_features` selection but writes the result as a
 new derived vector dataset. The created dataset uses