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- United States Coast Survey.437
- Dibblee, T. W. (Thomas Wilson), 1911-2004.379
- Geological Survey (U.S.)222
- MassGIS (Office : Mass.)130
- Aerospace Center (U.S.)126
- Survey of Pakistan.118
- United States. National Imagery and Mapping Agency118
- United States. Army Map Service.107
- United States. National Imagery and Mapping Agency.101
- National Imagery and Mapping Agency85
- United States. Army Map Service, cartographer, issuing body.67
- United States. Central Intelligence Agency.63
- Snohomish County Geographic Information System (GIS), Dept. of Information Services52
- United States. Army Map Service, compiler, cartographer, issuing body.52
- Geological Survey of Canada.51
- Surveyor General of Pakistan.51
- Surveyor General, Cape Town, Department of Land Affairs45
- MassGIS43
- Shirkat-i Gītā Shināsī.41
- Cambridge (Mass.). Geographic Information Systems40