National Council of Examiners for Engineering and Surveying (NCEES)

​

American Land Title Association (ALTA)

​

American Congress on Surveying and Mapping (ACSM)

​

National Society of Professional Surveyors (NSPS)

​

National Geodetic Survey (NGS)

​

NGS Datasheets

​

U.S. Geological Survey (USGS)

​

Bureau of Land Management (BLM)

​

BLM - Federal Land Records Site (GLO Records)

​

BLM - Manual of Surveying Instructions of 1973

​

FEMA Map Service Center

​

FEMA Letter of Map Amendment (LOMA) or Letter of Map Revision (LOMR-F)

​

FEMA Elevation Certificate

​

Federal Geographic Data Committee (FGDC)

​

Principal Meridians and Baselines