Geoid Height and Deflections of the Vertical Models - National Geospatial Data Asset (NGDA) Geoid Models

Metadata Updated: February 27, 2019

In Gauss' words, the geoid is "the mathematical figure of the Earth". This figure is an equipotential surface coincident with the idealized mean sea surface. The geoid can be computed from the geodetic boundary value problems that use gravity data as its boundary value. A geoid model computed using gravity data is called gravimetric geoid. On the other hand, geoid height at bench marks can also be computed using data of the spirit leveling and the Global Positioning System (GPS). A geoid model that fixed to the GPS/leveling data is called hybrid geoid. Both geoid models can serve as the zero-height-surface of a country's height system by selection. To satisfy this need, National Geodetic Survey has published a series of geoid models (http://geodesy.noaa.gov/GEOID). The latest models are USGG2012 and GEOID12B, both are at 1 arc-second grids over the territory of the United States.

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Metadata Date November 28, 2018
Metadata Created Date February 7, 2018
Metadata Updated Date February 27, 2019
Reference Date(s) 2013 (publication)
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Harvested from NOAA CSW Harvest Source

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Resource Type Dataset
Metadata Date November 28, 2018
Metadata Created Date February 7, 2018
Metadata Updated Date February 27, 2019
Reference Date(s) 2013 (publication)
Responsible Party (Point of Contact, Custodian)
Contact Email
Access Constraints Access Constraints: none | Use Constraints: none | Distribution Liability: none
Bbox East Long -63
Bbox North Lat 71
Bbox South Lat 15
Bbox West Long -175
Coupled Resource
Frequency Of Update
Guid gov.noaa.nmfs.inport:39739
Harvest Object Id bfbafbad-f2da-4134-9a1f-8fd8a206bd2f
Harvest Source Id 2aed8e29-fc5b-4cde-aa66-fb1118fd705e
Harvest Source Title NOAA CSW Harvest Source
Licence NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose.
Metadata Language eng
Metadata Type geospatial
Progress completed
Spatial Data Service Type
Spatial Reference System
Spatial Harvester True

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