Acronym  Meaning
1D  One Dimensional
2D Two-dimensional
3D Three-dimensional
A-E Architect-Engineer
ACSM American Congress on Surveying and Mapping
AGC Army Geospatial Center
ASCE American Society of Civil Engineers
ASPRS American Society for Photogrammetry and Remote Sensing
BFE Base Flood Elevation
BS Backsight
CADD Computer Aided Drafting and Design
CHL  Coastal and Hydraulics Laboratory
CONUS CONtinental United States
CORS Continuously Operating Reference Stations
DOD Department of Defense
DOT Department of Transportation
DGPS Differential Global Positioning System
EDM Electronic Distance Measurement
EM Engineer Manual
ER Engineer Regulation
ERDC Engineer Research and Development Center
FEMA Federal Emergency Management Agency
FGCS Federal Geodetic Control Subcommittee
FGDC Federal Geographic Data Committee
FIRM Flood Insurance Rate Map
FS Foresight
GIS Geographic Information System
GPS Global Positioning System
GRS80 Geodetic Reference System of 1980
HARN High Accuracy Regional Networks
HI Height of Instrument
HPGN High Precision Geodetic Network
HQUSACE Headquarters, US Army Corps of Engineers
HTL High Tide Line
IERS International Earth Rotation Service
IGLD 55 International Great Lakes Datum of 1955
IGLD 85 International Great Lakes Datum of 1985
ITRF International Terrestrial Reference Frame
LIDAR Light Detection And Ranging
LMSL Local Mean Sea Level
LAT Lowest Astronomical Tide
LPCP Local Project Control Point
LWRP Low Water Reference Plane
MACOM Major Army Command
MGRS Military Grid-Reference System
MHT Mean High Tide
MHW Mean High Water
MHWS Mean High Water Springs
MLLW Mean Lower Low Water
MLWS Mean Low Water Springs
MSL Mean Sea Level
NAD27 North American Datum of 1927
NAD83 North American Datum of 1983
NADCON North American Datum CONversion
NAVD88  North American Vertical Datum 1988
NFIP National Flood Insurance Program
 NGRS National Geodetic Reference System
NGS National Geodetic Survey
NGVD 29 National Geodetic Vertical Datum 1929
NMAS National Map Accuracy Standard
NOAA National Oceanic and Atmospheric Administration
NOS National Ocean Service
NSRS National Spatial Reference System
NSSDA National Standard for Spatial Data Accuracy
NTDE National Tidal Datum Epoch
NVCN National Vertical Control Network
NWLON National Water level Observation Network
OCONUS Outside the Continental United States
OHWM Ordinary High Water Mark
OPUS On-Line Positioning User Service
P&S Plans and Specifications
PBM Permanent Benchmark
PC Point of Curve
PED Preconstruction Engineering and Design
PI Point of Intersection
POB Point of Beginning
POT Point of Tangency
PPCP Primary Project Control Point
ppm Parts per Million
PT  Point of Tangent
QA Quality Assurance
QC Quality Control
RMS Root mean Square
RMSE Root Mean Square Error
RTK Real Time Kinematic
RTN Real Time Network
SOW Scope or Statement of Work
SPCS State Plane Coordinate System
TBM Temporary Benchmark
TEC Topographic Engineering Center
TIN Triangular Irregular Network
TM Transverse Mercator
US United States
USACE US Army Corps of Engineers
USC&GS US Coast & Geodetic Survey
USCG US Coast Guard
USGS US Geological Survey
U-SMART USACE Survey Monumentation Archival and Retrieval Tool
USNG US National Grid
UTM Universal Transverse Mercator
VDatum (National) Vertical Datum
VDOP Vertical Dilution of Position
VRN Virtual Reference Network
WGS 84 World Geodetic System of 1984
WRDA Water Resources Development Act