GEOID12B will compute geoid heights for the following geographic areas:
Area | Ellipsoid Reference Frame | Vertical Datum | Latitude | Longitude | ||
Min | Max | Min | Max | |||
Conterminous United States | NAD83 (2011) | NAVD88 | 24N | 58N | 60W | 130W |
Alaska | NAD83 (2011) | NAVD88 | 49N | 72N | 126W | 188W |
Hawaii | NAD83 (PA11) | W0 from USGG2012 | 18N | 24N | 154W | 161W |
Guam and Northern Mariana Islands | NAD83 (MA11) | GUVD04 and NMVD03 | 11N | 18N | 143E | 146E |
American Samoa | NAD83 (PA11) | ASVD02 | 17S | 11S | 168W | 174W |
Puerto Rico/U.S. Virgin Islands | NAD83 (2011) | PRVD02 and VIVD09 | 15N | 21N | 64W | 69W |
The formats below may be used for entering latitude and longitude. Degrees, minutes, and seconds must be separated by spaces. (Note that commas, valid separators for Geoid96 computations, are not valid for Geoid12 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 |
Latitude Example: -13 49 50.03964    | Longitude Example: 171 45 20.01753 (West) |
Send e-mail to NGS Geoid Team or call
(301) 713-3202.