COMPUTATION OF GEOID03 GEOID HEIGHT

A GEOID03 geoid height can be computed for a specific geographic location or for a file of input points. Position coordinates should be in NAD 83 or ITRF (not NAD27, Old Hawaiian, or Puerto Rico Datums).

GEOID03 will compute geoid heights for the following areas:

Area Latitude Longitude
Min Max Min Max
Conterminous US 24N 58N 60W 130W
Alaska 49N 72N 126W 188W
Hawaii 18N 24N 154W 161W
Puerto Rico/Virgin Islands 15N 21N 64W 69W

Compute a GEOID03 geoid height for a single location:

The formats below may be used for entering latitude and longitude. Degrees, Minutes, and Seconds must be separated by spaces. (Note that commas, which were valid seperators for Geoid96 computations, are not valid for Geoid03 computations.)

Degrees, minutes, and decimal seconds
Latitude Example: 35 55 19.0221
Longitude Example: 97 55 40.2351
Degrees, minutes, and integer seconds
Latitude Example: 35 55 19
Longitude Example: 97 55 40
Degrees and decimal minutes
Latitude Example: 35 55.3453
Degrees and integer minutes
Latitude Example: 35 55
Decimal degrees.
Latitude Example: 35.9320
Integer degrees.
Latitude Example: 35

Enter Latitude:

Enter Longitude: West East


Compute GEOID03 geoid heights for a file of input points:

There are three choices of input format. Each input format has a corresponding file output format, most of which are text files suitable for further processing. You may use the SaveAs function of your browser to save this output file to your computer.

Choose an input format:

Free Format Type 1 [explain]
Free Format Type 2 [explain]
NGS Blue Book (*80* and *86* records) format [explain]

Specify the input file (on your computer)

Specify the longitude convention for your file: Positive West Positive East


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