Big Ten Academic Alliance Geospatial Information Network and US Census. This dataset contains the boundaries of the 50 United States. It was derived from the cartographic boundary files available on https://www.census.g...
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2020. Briscoe Runquist, Ryan D., Lake, Thomas A., and Moeller, David A. Click "Visit Source" to download CSV data. This data can be used to replicate the results from the manuscript "Improving predictions of range expan...
1991. U.S. Census Bureau. and GeoLytics, Inc. District boundaries for the 102nd United States Congress, Jan. 3, 1991 to Jan. 3, 1993. Harvard Geospatial Library.
1999. Bureau of Transportation Statistics, (comp.). The 106th Congressional District Boundaries data set contains geographic information for the political entities of the Congressional districts of t... Bureau of Transportation Statistics.
2012. Patterson, Tom and Kelso, Nathaniel Vaughn. This line shapefile displays graticules (grid lines of latitude parallels and longitude meridians) for the world at 10 degree intervals. Graticules... North American Cartographic Information Society.
2012. Patterson, Tom and Kelso, Nathaniel Vaughn. This line shapefile displays graticules (grid lines of latitude parallels and longitude meridians) for the world at 10 degree intervals. Graticules... North American Cartographic Information Society.
2014. National Atlas of the United States. This line shapefile includes Global Map data showing the coastline of the United States, Puerto Rico, and the U.S. Virgin Islands. The United State... National Atlas of the United States.
2014. Geological Survey (U.S.). This polygon shapefile contains the county boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands, by showing the counties as ar... Geological Survey (U.S.).
2014. Geological Survey (U.S.). This polygon shapefile contains the county boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. This layer was derived from t... Geological Survey (U.S.).
2014. Geological Survey (U.S.). This polygon shapefile contains the boundaries of the United States, Puerto Rico, and the U.S. Virgin Islands. The map layer was created by extract... Geological Survey (U.S.).