NGS Geodetic Tool Kit-Geodetic Tools for the Professional Land Surveyor

The NGS Geodetic Tool Kit is a great online resource with over 25 interactive geodetic computation tools. Many professional land surveyors who use GPS may be familiar with OPUS, however, the other programs deserve your attention as they may be the answer to your geodetic surveying computation questions.

NGS Geodetic Tool Kit NGS homepage NOAA homepage

on-line interactive computation of geodetic values

DEFLEC99
DYNAMIC_HT
G99SSS
GEOID99
GEOID03
GEOID06
USGG2003
HTDP
IGLD85
Inverse/Forward/Invers3D/Forwrd3D
LVL_DH
Magnetic Declination
NADCON
NAVD 88 Modelled Gravity
Online Adjustment User Services
Online Adjustment Utilities User Services
OPUS
State Plane Coordinates
Surface Gravity Prediction
Tidal and Orthometric Elevations
U.S. National Grid
Universal Transverse Mercator Coordinates
VERTCON
XYZ Coordinate Conversion