Claude VM
47d6ba329c
Adds a 5th basemap option ("Istoric") that loads historical ESRI World
Imagery snapshots from the public Wayback service. Free, CORS-open,
193+ releases dating back to 2014; each release is identified by a
numeric id baked into the tile URL pattern.
How it works:
- wayback-catalog.ts fetches the public waybackconfig.json once per
24h, parses each release's title for an ISO date, and exposes a
newest-first list of { id, date, title, itemUrl }.
- BasemapSwitcher reveals a date dropdown beneath the basemap buttons
when "Istoric" is selected. Auto-picks the latest release on first
show; user can pick any past date.
- map-viewer rebuilds the MapLibre style when basemap=="wayback" with
the user-picked release id patched into the raster source tiles[].
Tile URL format (WMTS, {z}/{y}/{x} not {z}/{x}/{y}):
https://wayback.maptiles.arcgis.com/arcgis/rest/services
/World_Imagery/WMTS/1.0.0/default028mm/MapServer
/tile/<releaseId>/{z}/{y}/{x}
Esri's edge deduplicates identical tiles via 301 → another release id
(MapLibre/browser follows the redirect transparently), so picking a
random old date doesn't always show a different image when nothing
changed in that pixel — that's a feature of Wayback, not a bug.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>