Here are some links that may help with your GIS work.

If you have suggestions for additions to this list please send them to

professionalsupport@thalesnavigation.com

http://www.nationalatlas.gov/atlasftp.html

http://www.ngs.noaa.gov/PUBS_LIB/develop_NSRS.html

http://www.ngs.noaa.gov/PUBS_LIB/FundSPCSys.pdf

http://www.ngs.noaa.gov/PUBS_LIB/ManualNOSNGS5.pdf

http://www.ngs.noaa.gov/PUBS_LIB/TMNOSNGS58.pdf

http://www.fgdc.gov/index.html

http://fgdc.er.usgs.gov/

http://fgdc.er.usgs.gov/clearinghouse/clearinghouse.html

http://www.ngs.noaa.gov/PUBS_LIB/Guidebook1of3.pdf

http://www.ngs.noaa.gov/PUBS_LIB/Guidebook2of3.pdf

http://www.ngs.noaa.gov/PUBS_LIB/Guidebook3of3.pdf

http://www.geod.nrcan.gc.ca/index_e/products_e/publications_e/publications_e.html

http://ask.usgs.gov/

http://www.ngs.noaa.gov/TOOLS/XYZ/xyz.html

http://www.ngs.noaa.gov/ANTCAL/Files/summary.html

http://www.ngs.noaa.gov/OPUS/discussion.html

http://www.ngs.noaa.gov/PUBS_LIB/GeoLay.pdf

http://www.ngdc.noaa.gov/

http://www.ngs.noaa.gov/CORS/information4/

http://www.ngs.noaa.gov/PUBS_LIB/FedRegister/FRdoc95-19408.pdf

http://164.214.2.59/

http://www.aag.org/

http://www.acsm.net

http://www.acsm.net/cagis/index.html

http://www.acsm.net/glis/index.html

http://www.planning.org/

http://www.giscafe.com/

http://www.census.gov/

http://www.tnris.state.tx.us/gistools/coordinate.htm

http://www.fema.gov/fhm/tsdindex.shtm

http://www.geocomm.com/

http://www.blm.gov/gcdb/

http://www.geo.ou.edu/

http://www.geocommunicator.gov/

http://www.geoall.net/index.html

http://www.geoplace.com/default.asp

http://www.geospatial-online.com/geospatialsolutions/

http://www.fws.gov/data/gishome.html

http://www.gis.com/

http://www.gisdevelopment.net/

http://rockyweb.cr.usgs.gov/

http://rockyweb.cr.usgs.gov/outreach/articles.html

http://www.gpsnuts.com/

http://www.geocaching.com/

http://gis.ca.gov/

http://gis.ca.gov/data_index.epl

http://max.cdfa.ca.gov/

http://datagateway.nrcs.usda.gov/

http://wgiac2.state.wy.us/html/index.asp

http://www.ngs.noaa.gov/PUBS_LIB/FedRegister/FRdoc89-14076.pdf

http://www.ngs.noaa.gov/PUBS_LIB/FedRegister/FRdoc93-14922.pdf