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- Sanborn Map Company123
- Boundary Solutions, Inc.109
- National Atlas of the United States53
- Geological Survey (U.S.)34
- Cao, Changyong21
- Earle, Carville21
- Heppen, John21
- Louisiana State University (Baton Rouge, La.). Department of Geography and Anthropology.21
- Otterstrom, Samuel21
- Pennsylvania. Bureau of Topographic and Geologic Survey.11
- 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
- Platts9
- U.S. Department of Commerce, U.S. Census Bureau, Geography Division, Geographic Products Branch8
- United States Geological Survey8