Map of the surveyed part of the Territory of Michigan (Risdon, 1825)

Orange Risdon’s map of the surveyed part of Michigan Territory, engraved by Rawdon, Clark & Co. at Albany in 1825: the country of the first land sales, from the Detroit and St. Clair rivers west to the Principal Meridian and north to Saginaw, laid out in its counties, townships and sections, with the strip south to the line it marks as the northern boundary of Ohio (Port Lawrence, now Toledo, north of it) and the Upper Canada shore from Sandwich to Amherstburg. It shows the young towns — Detroit, Monroe, Pontiac, Mt. Clemens, Ann Arbor, Ypsilanti, Dexter, Tecumseh, Palmer (St. Clair) and Saginaw — with their mills, inns and roads, among them the new “United States Road” toward Chicago, and the Anishinaabe (Ojibwe, Odawa, Potawatomi) and Wyandot country they were laid over: Indian villages on the Saginaw, the Cass, the Flint and the Raisin, at Brownstown and on Lake St. Clair, and the reserves kept in the treaties of 1807–1819 with their acreages — the Wyandot reserve at Brownstown, the Macon reserve on the Raisin, Tonquish’s and the “Sequinsackin Res.” on the Rouge, Maconce’s on Lake St. Clair, and the Saginaw reserves on the Saginaw, Tittabawassee, Cass, Flint and Shiawassee. In fine dots, keyed “Indian Trails”, it draws a web of trails, none of them named: from Saginaw up the Flint and the Shiawassee, across Livingston and Oakland to the lakes and on to Detroit, west from Ann Arbor toward the St. Joseph country, and from Saline by Tecumseh west — the Detroit–Chicago trail. The unsurveyed Thumb and Saginaw Bay, sketched too freely to place, are not shown; nor are the title, the key, and Lake Erie with its islands.

Open full-screen map

Advertisement

Source

MapMap of the surveyed part of the territory of Michigan
AuthorOrange Risdon, 1825
ArchiveMichigan State University Libraries
RightsPublic domain. Published 1825 — before 1931, so public domain in the United States. Evidence
AccuracyAbout 3 km (RMS 0.7 km at 60 control points). 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.
MethodPlaced by hand: a second-degree polynomial through 60 places read from the scan and matched to their positions today — 43 corners of the survey’s township grid, from the initial point of the Michigan survey to T14N and T8S, R1–17E (positions from the Bureau of Land Management’s survey records), 13 towns (from Detroit, Monroe and Palmer to Tecumseh, Byron and Saginaw, and Sandwich and Amherstburg across the river), three islands of the Detroit River and the mouth of the Saginaw. The surveyed townships are engraved closely: left out of the fit in turn, half the places fall within 0.5 km of where it puts them (RMS 0.8 km; Dexter, Fighting Island and the initial point furthest, about 2 km). Masked: the title, the key and the margins, the seams between the cloth-mounted sections and a tear south of the Flint, and the coasts the survey had not reached — Saginaw Bay and the Thumb, and Lake Erie with its islands — which the map draws freely. See the methodology.
Version1.0.0, updated 2026-10-16
CoversMichigan, Ohio

Downloads

Project Homeland

This map’s trails are traced into Project Homeland, one map of the trail network melded from every traced source, where they are compared with the other maps’ lines. Members can trace more of them: Trace a trail on the map.

Changelog

  • 1.0.0 (2026-10-16): First release: placed by hand at 60 places. From Michigan State University Libraries (maps:13); added for Project Homeland.

Credits

  • From Michigan State University Libraries (maps:13); added for Project Homeland
  • Georeferencing: Native Routes
  • Scan: Michigan State University Libraries

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.

Talk about this map

Discussion board for MI

Start a thread All discussions

Know this map? Join free to add field notes, fix where a place sits on the map, and help find more maps.Join free

Sources from readers

Know a county history, a survey record or an article that bears on this? Add a source — it’s credited to you.

Advertisement