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Volunteer Contributions

Volunteers are making significant contributions to USGS National Structures Database, The National Map, and ultimately U.S. Topo Maps!

Volunteer Contributions

This status map shows The National Map Corps contributions from March 29th, 2012, to November 30, 2023. 

A map showing volunteer contributions from the inception of TNMCorps through November 30, 2023. Contributions are displayed by fiscal year with contributions during the current fiscal year displayed by quarter. Points are color-coded on a graduated gray-to-red scale; older points are gray and newer points are red.