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The CALIBRAT program is used to determine the scale and constant corrections for electronic distance measuring instruments by making measurements over previously determined base lines. The formulas ...

2. Horizontal Time-Dependent Positioning (HTDP) [NOAA_NGS_HTDP]
This horizontal time-dependent positioning software program allows users to predict horizontal displacements and/or velocities at locations throughout the United States and its territories. This software ...

3. North American Datum Conversion Utility (NADCON) [NOAA_NGS_NADCON]
The North American Datum Conversion Utility (NADCON) transforms latitude and longitude coordinate values between two geodetic coordinate systems known as “datums.” To do so, NADCON uses a pair of ...

4. North American Vertical Datum Conversion (VERTCON) Software [NOAA_NGS_VERTCON]
The North American Vertical Datum Conversion (VERTCON) software computes the modeled difference in orthometric height between the North American Vertical Datum of 1988 (NAVD 88) and the National Geodetic ...

5. U.S. National Grid (USNG) System Conversion Software [NOAA_NGS_USNG]
The software converts between USNG, UTM, and geodetic latitude/longitude. The U.S. National Grid (USNG) System is an alpha-numeric reference system that overlays the UTM coordinate system. It is a ...

USGG2003 is a gravimetric geoid model, and is an update of the G99SSS model. USGG2003 covers the coterminous U.S., Alaska, Hawaii, Puerto Rico and the American Virgin Islands. [Summary provided ...

7. NOAA Shoreline Data Explorer [NOAA_Shoreline_GIS]
The NOAA Shoreline Data Explorer provides high-resolution digital shoreline from multi-temporal surveys of our nation's coastline. It provides the following capabilities: -View available shoreline ...

8. Surface Gravity Prediction [NOAA-Gravity]
NOAA's National Geodetic Survey provides an on-line computation of estimated gravity for a given location in the United States.

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