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
@@ -29,11 +29,14 @@ them explicit. Forest therefore defaults to the official modern 2013-2025
 10 m series, while the separate 1778-1969 historical map series remains
 selectable and is never merged into the same trend.

-Selection results use dataset-specific PostGIS summaries. Object layers show
-intersecting counts, population shows inhabitants with partial-sector
-estimates clearly marked and land-cover sources show intersected hectares. The
-advanced workbench remains available but is not required for the primary
-choose-theme, draw-area, read-result flow.
+Selection results use dataset-specific PostGIS summaries with end-user units.
+Building footprints, forest, water surfaces and parcels show intersected
+hectares; roads and linear watercourses show kilometres; population shows
+inhabitants with partial-sector estimates clearly marked. Intersecting object
+counts remain visible as supporting source evidence instead of being the only
+result. Water explicitly explains that volume cannot be derived without a
+reliable depth or bathymetry source. The advanced workbench remains available
+but is not required for the primary choose-theme, draw-area, read-result flow.

 The primary workflow is deliberately short: choose a municipality or the complete region, choose a data theme, drag a rectangle on the MapLibre map and read the resulting PostGIS evidence. Releasing the drag runs the active theme query and every other available theme query for the same EPSG:4326 bbox. The result panel shows selection area, exact intersection totals, active-theme density, source identity and bounded feature properties. Map rendering remains capped at 1,000 features while `total_feature_count` reports the exact database count.