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Federal
TIGER/Line Shapefile, 2018, nation, U.S., Current County and Equivalent National Shapefile
U.S. Census Bureau, Department of Commerce —
The TIGER/Line shapefiles and related database files (.dbf) are an extract of selected geographic and cartographic information from the U.S. Census Bureau's Master... -
Federal
ISLSCP II Atmospheric Carbon Dioxide Consumption by Continental Erosion
National Aeronautics and Space Administration —
The Continental Atmospheric CO2 Consumption data set represents gridded estimates for the riverine export of carbon and of sediments based on empirical models. All...