Creator
- United States. Bureau of Transportation Statistics36
- Geological Survey (U.S.)23
- Stackhouse, Cecil17
- National Atlas of the United States14
- National Geophysical Data Center8
- United States. Bureau of the Census. Geography Division7
- Bush, Charles A.5
- Environmental Systems Research Institute (Redlands, Calif.)5
- Reed, John Calvin, Jr. 1930-5
- EROS Data Center2
- Gap Analysis Program (U.S.)2
- Hijmans, Robert J.2
- Rawson, Peg2
- United States. Federal Aviation Administration2
- United States. Federal Transit Administration2
- Vanderbilt Engineering Center for Transportation Operations and Research2
- Waterborne Commerce Statistics Center (U.S.)2
- Canada Centre for Mapping1
- Geological Survey (U.S.). Water Resources Division. Wisconsin District1
- Institute for Water Resources (U.S.). Navigation Data Center1