1848. Graves, Richard, Strong, Richard, Mattke, Ryan, Kne, Len, Shepard, Coleman, and Kernik, Melinda. These shapefiles of lakes, streams, wetlands, river bottoms, and the Mississippi River represent the hydrological landscape of Minneapolis and St. ... University of Minnesota.
1848. Dubuque Land Office. Military Reservation of Fort Snelling, missing area south of the Mississippi. Minnesota Geospatial Information Office (MnGeo).
1848. Dubuque Land Office. Same as map ID 642, but signed with meanders, meanders continue on back. Minnesota Geospatial Information Office (MnGeo).
1848. Minnesota's original public land survey plat maps were created between 1848 and 1907 during the first government land survey of the state by the U....
1849. Prime meridians: Washington, D.C. & Greenwich.Below lower left margin: Entered according to Act of Congress in the year 1849 by W. Williams in the ... D. Appleton and Company (Philadelphia).