Creator
- Geological Survey (U.S.)11
- National Atlas of the United States6
- EROS Data Center3
- Rumsey, David, 1944-2
- Burroughs, H. N.1
- Canada Centre for Mapping1
- Instituto Nacional de Estadística, Geografía e Informática (Mexico)1
- Mitchell, Samuel Augustus1
- Southern Pacific Company1
- USGS National Center for EROS1
- United States. Forest Service1