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GEOG 40191: Seminar in Geography: National Data (U.S.)

National Data

National Datasets are provided at a national level and may be additionally broken out into smaller geographies.

Many datasets already have some spatial references, while others need to have a geographic file linked or merged with them to be mapped effectively.

Data Layers for ArcGIS

These are updated for the 2012 ArcGIS 10.1 release.

National Data U.S.

These sites are links to data libraries where you can select and download spatial data.