- Sanborn Map Company54
- National Atlas of the United States39
- Geological Survey (U.S.)33
- International Boundary & Water Commission, United States & Mexico.29
- Arndt, Raymond E.10
- Bawiec, Walter J.10
- Beikman, Helen M.10
- King, Philip B.10
- National Geophysical Data Center10
- Schruben, Paul G.10
- Geological Survey (U.S.) Minerals Information Team9
- EROS Data Center3
- Godt, Jonathan W.3
- Josh Conrad, Grace Hansen, Katie Pierce Meyer, Michael Shensky, Jessica Trelogan3
- U.S. Census Bureau. Geography Division2
- United States. Forest Service2
- Wade, Tim2
- Blackburn, Laura1
- Burroughs, H. N.1
- Canada Centre for Mapping1
