Some Web Sites Frequently used by the Survey Department:
Arizona State Land Department
http://www.land.state.az.us
National Geodetic Survey
http://www.ngs.noaa.gov/
American Congress on Surveying and Mapping (ACSM)
http://www.acsm.net
The Hydrographic Society of America (THSOA)
http://www.thsoa.org/
National Park Service - Grand Canyon National Park
http://www.nps.gov/grca/
Northern Arizona University (NAU) Sand Bar Studies
http://www4.nau.edu/geology/namdor/