The National Map

[1] The purpose of the effort is to provide "...a seamless, continuously maintained set of public domain geographic base information that will serve as a foundation for integrating, sharing, and using other data easily and consistently".

[1] The USGS also utilizes data from The National Map Corps, which consists of volunteers who devote some of their time to provide cartographic information on structures.

[5] The National Map Corps consists of volunteers who devote some of their time to provide cartographic information to the U.S. Geological Survey.

The data was entered in spreadsheet format or in ESRI shapefiles and submitted via e-mail to the USGS National Geospatial Technical Operations Center(s) in Denver, Colorado, and Rolla, Missouri.

While there was no deadline for completing maps, the project's administrators preferred volunteers to submit coordinates for all structures in the quad no more than one year after beginning work.