fix(map): exclude high-resolution rasters from overview

docs/CODEX_EXECUTION_LOG.md

@@ -10990,3 +10990,20 @@ Remaining in this pass:
 - run the complete readiness gate, deploy the immutable revision and repeat
   both the large overview rectangle and a regional partitioned rectangle in
   the live browser.
+
+## 2026-07-21 - Persisted raster scale guard
+
+Live verification of the first scale-aware release showed that on-demand
+provider fan-out was resolved, but already persisted 5 m terrain and flood
+rasters could still enter a Belgium-scale analysis. The shared selection guard
+now applies the same real pixel budgets to persisted rasters: country-scale
+overview analysis keeps PostGIS vector and national statistical sources, while
+high-resolution rasters require detail or safely bounded regional extent.
+
+Validation:
+
+- frontend typecheck, 29 unit tests and the production build passed;
+- the map acquisition, component-boundary and density regression contracts
+  passed (12 tests);
+- live redeployment and a repeated Belgium-scale rectangle follow on the
+  immutable patch revision.

frontend/src/components/map/MapWorkspace.tsx

@@ -34,6 +34,7 @@ import {
   normalizeBboxFromCorners,
   operationalScopeProjectLabel,
   parseBboxInput,
+  persistedDatasetSupportsSelection,
   productCoversZones,
   readablePropertyName,
   resultCountLabel,
@@ -1154,7 +1155,8 @@ export function MapWorkspace({
       if (boundedThemes.has(theme.id)) {
         return true
       }
-      if (!themeDatasetMap[theme.id]) {
+      const dataset = themeDatasetMap[theme.id]
+      if (!dataset || !persistedDatasetSupportsSelection(dataset, mapSelectionBbox)) {
         return false
       }
       const coverageTheme = COVERAGE_THEME_BY_MAP_THEME[theme.id]
@@ -1830,7 +1832,7 @@ export function MapWorkspace({
     const availableThemes: Array<MapThemeQuery<DataThemeId>> = []
     for (const theme of DATA_THEMES) {
       const dataset = themeDatasetMap[theme.id]
-      if (dataset) {
+      if (dataset && persistedDatasetSupportsSelection(dataset, bbox)) {
         availableThemes.push({
           themeId: theme.id,
           dataset,
@@ -1865,7 +1867,12 @@ export function MapWorkspace({
     setMapAnalysisDurationMs(null)
     setSelectionBbox(bbox)
     const tasks: Array<Promise<unknown>> = [loadAllThemeResults(bbox, areaId)]
-    if (activeThemeAvailable && !regionalPartitionedThemeActive && !onDemandThemeActive) {
+    const activeDatasetSupportsSelection = !activeThemeDataset
+      || persistedDatasetSupportsSelection(activeThemeDataset, bbox)
+    if (
+      activeThemeAvailable && !regionalPartitionedThemeActive && !onDemandThemeActive
+      && activeDatasetSupportsSelection
+    ) {
       tasks.push(onRunMapSelectionExtract(bbox, areaId))
     }
     if (analysisMode === 'evolution' && earlierDatasetId && laterDatasetId) {

frontend/src/components/map/mapWorkspaceUtils.test.ts

@@ -5,6 +5,7 @@ import {
   isSelectionBoundedDataset,
   normalizeBboxFromCorners,
   parseBboxInput,
+  persistedDatasetSupportsSelection,
   productCoversZones,
   resultMetricLabel,
   selectedAreaCoverageZones,
@@ -138,4 +139,22 @@ describe('map workspace selection guards', () => {
     }
     expect(() => splitSelectionBbox(selection)).toThrow('detailpartities')
   })
+
+  it('keeps persisted high-resolution rasters out of overview selections', () => {
+    const overview: VectorSelectionBBox = {
+      min_x: 2.5,
+      min_y: 49.5,
+      max_x: 6.4,
+      max_y: 51.5,
+      crs: 'EPSG:4326',
+    }
+    expect(persistedDatasetSupportsSelection(
+      { dataset_type: 'raster', source_name: 'digitaal_vlaanderen_dhmv' },
+      overview,
+    )).toBe(false)
+    expect(persistedDatasetSupportsSelection(
+      { dataset_type: 'vector', source_name: 'statbel' },
+      overview,
+    )).toBe(true)
+  })
 })

frontend/src/components/map/mapWorkspaceUtils.ts

@@ -100,6 +100,23 @@ export function selectionAnalysisScale(bbox: VectorSelectionBBox): SelectionAnal
   return 'overview'
 }
 
+export function persistedDatasetSupportsSelection(
+  dataset: { dataset_type: string; source_name?: string | null },
+  bbox: VectorSelectionBBox,
+): boolean {
+  if (dataset.dataset_type !== 'raster') return true
+  const scale = selectionAnalysisScale(bbox)
+  if (scale === 'overview') return false
+  const dimensions = selectionDimensions(bbox)
+  if (dataset.source_name === 'digitaal_vlaanderen_dhmv' || dataset.source_name === 'vmm_flood_hazard') {
+    return dimensions.areaSquareMetres <= 280_000_000
+  }
+  if (dataset.source_name === 'department_omgeving_thematic_raster') {
+    return dimensions.areaSquareMetres <= 2_800_000_000
+  }
+  return scale === 'detail'
+}
+
 export function splitSelectionBbox(
   bbox: VectorSelectionBBox,
   maxTileSideMetres = 18_000,