Compare historic maps
Fade between two georeferenced historic maps to see how Grant County's cartography changed era to era — what was named, what was missed, where the roads ran, where the mining districts moved.
Two overlays required
The corpus has 0 published historic-map overlays so far — comparison needs at least two. Upload more via the Phase 17 admin endpoint (POST /api/admin/old-west/map-overlays). Once two land, this page becomes the comparison tool.
Other map views
- Time-machine map — year slider over place markers
- Research trails — curated walking routes