Western Colorado and part of Utah, Sheet VII, Geological and Geographical Atlas of Colorado (Hayden, 1877)
Sheet VII of F. V. Hayden’s Geological and Geographical Atlas of Colorado (U.S. Geological and Geographical Survey of the Territories, 1877), surveyed 1874–76 by Henry Gannett and A. D. Wilson: the Ute Reservation from the Grand River and Grand Mesa to the Uncompahgre valley and the San Juan Mountains, with the Navajo Trail across the Uncompahgre Plateau, the Ute farms, the trails and roads of the Gunnison and Uncompahgre country and contours every 200 feet.
Source
| Map | Geological and geographical atlas of Colorado and portions of adjacent territory, LOC gs08000146-10 |
|---|---|
| Author | F. V. Hayden (Henry Gannett and A. D. Wilson, topographers), 1877 |
| Archive | Wikimedia Commons |
| Rights | Public domain. Published 1877 — before 1931, so public domain in the United States. Evidence |
| Accuracy | About 3 km. Placed by hand in a map-queue session and approved by a person. If something sits in the wrong place, members can fix it with Fix placement on the map. |
| Method | Placed by hand on the sheet’s own graticule: a polyconic fit to 20 crossings of its 15′ meridians and parallels read off the scan (0.09 km RMS), checked against Mount Sneffels (0.1 km), Wetterhorn (0.3 km), Snowmass (0.6 km) and Capitol Peak (0.9 km); 66 crossings. See the methodology. |
| Version | 1.0.0, updated 2026-10-12 |
| Covers | Colorado, Utah |
Downloads
- Google Earth overlay (KMZ) — free (8.2 MB)
- GeoTIFF, tinted trails, EPSG:4326 (6000 × 3198; QGIS, ArcGIS) — free (18.2 MB)
- Print sheet over today’s map (3600 × 2200 PNG) — free (4.3 MB)
Project Homeland
This map is open for tracing into Project Homeland, one map of the trail network melded from every traced source. Members trace a trail by clicking along it: Trace a trail on the map.
Changelog
- 1.0.0 (2026-10-12): First release: placed by hand at 66 places. From the Library of Congress (gs08000146) via Wikimedia Commons; added for Project Homeland.
Credits
- From the Library of Congress (gs08000146) via Wikimedia Commons; added for Project Homeland
- Georeferencing: Native Routes
- Scan: Wikimedia Commons
Control points
The full list of control points with residuals is in control-points.geojson. Historic names indexed for search: names.geojson.
Something on this map sits in the wrong place? Members can show where with Fix placement on the map — confirmed fixes are tested against the map’s other control points each night and credited here. For anything else, report a problem.
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