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on-line interactive computation of geodetic values


See the text version of an article about the NGS Geodetic Toolkit that appeared in the Professional Surveyor magazine, May 2003 Volume 23, Number 4

( See all the Professional Surveyor Articles about the NGS Geodetic Toolkit )

These utilities require Internet Explorer version 6.0+ and Netscape version 6.0+

To learn more about a particular online program, click on its link for a description:

DEFLEC99
DEFLEC09
DEFLEC12A
DYNAMIC_HT
GEOID12A
GEOID12
GEOID09
GEOID06
GEOID03
GEOID99
G99SSS
USGG2012
USGG2009
USGG2003
HTDP
IGLD85
Inverse/Forward/Invers3D/Forwrd3D
Leveling Online Computations User Service (LOCUS)
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
OR... Know what you want to do?
Select a function from this list:

For more information contact NGS Information Services:
by email,
or call (301) 713-3242, Monday - Friday, 7:00 AM - 4:30 PM eastern time.

Last updated by NGS.Webmaster on January 23, 2013