Description:
The National Map Corps consists of citizens who devote some of their time to provide mapping information to the U.S. Geological Survey. Volunteers may download a guide that provides instructions on how to collect and send Global Positioning System (GPS) data to the USGS. A link is also provided to the National Map, an online, interacive mapping service. National Map users can zoom and pan about a map of the United States, find and identify features, and add layers of administrative and cultural data, elevations, topography, geology, and other data.
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