Useful GPS links:

National Geodetic Survey (CORS base station data) http://www.ngs.noaa.gov/CORS

US Geological Survey (digital topo and aerial photos) http://edc.usgs.gov/webglis/

Overview of GPS http://www.colorado.edu/geography/gcraft/notes/gps/gps_f.html

Status of national DGPS beacon coverage http://www.navcen.uscg.gov/dgps/ndgps/Default.htm

Precision Ag site http://nespal.cpes.peachnet.edu/home/links/pa/Default.asp

Last Updated: November 1st, 1998