Allmaps: Open-source tools for georeferencing and viewing digitised old maps. USGS topoView: Every historical USGS topographic map, free to view and download.
| Allmaps | USGS topoView | |
|---|---|---|
| Category | Historical & Old Maps | Historical & Old Maps |
| Coverage | Worldwide | United States |
| Updates | Continuously (community edits) | Static archive |
| Data source | Library IIIF collections | USGS Historical Topographic Map Collection |
| Made by | Allmaps | US Geological Survey |
| Price | Free | Free |
| Account | No account needed | No account needed |
| On phones | Best on a computer | Best on a computer |
| Map view | Flat map | Flat map |
| Visits from ColorfulMaps | 0 | 0 |
| Open map | Open map |
What you can do with Allmaps
- Georeference IIIF maps in the browser
- Overlay old maps on modern maps
- Open source and open standards
What you can do with USGS topoView
- Historical US topo maps since the 1880s
- Several editions per area
- Free downloads in several formats
Summary based on public information. Check each map's website for current features and prices.