. .
- - Geodetic Datums Map Projections Coordinate Systems Remote Sensing - - :
http://www.colorado.edu/geography/gc...tum/datum.html
http://www.colorado.edu/geography/gc...mapproj_f.html
http://www.colorado.edu/geography/gc.../coordsys.html
http://www.colorado.edu/geography/gc...te/remote.html