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This commit is contained in:
Andras Schmelczer 2026-06-18 07:52:19 +01:00
parent 18ace123dc
commit 2924209898
1 changed files with 9 additions and 0 deletions
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9
frontend/src/lib/overlays.ts
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@ -12,6 +12,8 @@ export interface OverlayDefinition {
label: string; label: string;
description: string; description: string;
detail: string; detail: string;
/** Enabled on a fresh visit (no `overlay` URL params). */
defaultEnabled?: boolean;
} }
export const OVERLAYS: OverlayDefinition[] = [ export const OVERLAYS: OverlayDefinition[] = [
@ -28,6 +30,7 @@ export const OVERLAYS: OverlayDefinition[] = [
description: 'Approximate police.uk street-crime heatmap', description: 'Approximate police.uk street-crime heatmap',
detail: detail:
'Client-side heatmap of street-level crimes published by police.uk over the most recent months. Police.uk coordinates are anonymised snap-to-grid points, not exact offence locations, so the heatmap should be read as an approximation of relative density rather than a precise map of incidents.', 'Client-side heatmap of street-level crimes published by police.uk over the most recent months. Police.uk coordinates are anonymised snap-to-grid points, not exact offence locations, so the heatmap should be read as an approximation of relative density rather than a precise map of incidents.',
defaultEnabled: true,
}, },
{ {
id: 'trees-outside-woodlands', id: 'trees-outside-woodlands',
@ -35,6 +38,7 @@ export const OVERLAYS: OverlayDefinition[] = [
description: 'Tree canopy and woodland polygons', description: 'Tree canopy and woodland polygons',
detail: detail:
'Forest Research Trees Outside Woodland (TOW) v1 canopy polygons — lone trees and groups of trees — unioned with National Forest Inventory (NFI) woodland blocks (≥0.5 ha) that TOW deliberately excludes. Together they cover both street trees and actual woods. Polygon opacity scales with canopy area.', 'Forest Research Trees Outside Woodland (TOW) v1 canopy polygons — lone trees and groups of trees — unioned with National Forest Inventory (NFI) woodland blocks (≥0.5 ha) that TOW deliberately excludes. Together they cover both street trees and actual woods. Polygon opacity scales with canopy area.',
defaultEnabled: true,
}, },
{ {
id: 'property-borders', id: 'property-borders',
@ -45,6 +49,11 @@ export const OVERLAYS: OverlayDefinition[] = [
}, },
]; ];
/** Overlays shown on a fresh visit, before any `overlay` URL params apply. */
export const DEFAULT_OVERLAY_IDS: OverlayId[] = OVERLAYS.filter((o) => o.defaultEnabled).map(
(o) => o.id
);
const OVERLAY_ID_SET = new Set<string>(OVERLAY_IDS); const OVERLAY_ID_SET = new Set<string>(OVERLAY_IDS);
export function isOverlayId(value: string): value is OverlayId { export function isOverlayId(value: string): value is OverlayId {