Geoid 12B

[Metadata] Geoid 12B: Hybrid geoid model used to convert the ellipsoidal height obtained by the Global Navigation Satellite System (to the orthometric height of a specific vertical datum). The National Geodetic Survey (NGS) has been producing the hybrid geoid to convert the ellipsoidal height obtained from the Global Navigation Satellite System (GNSS) to the orthometric height of a specific vertical datum. The GEOID12B model is intended to transform between NAD 83 (2011/PA11/MA11) and the respective vertical datums for the different regions, including NAVD88, GUVD04, ASVD02, NMVD03, PRVD02 and VIVD09. NOAA National Geodetic Survey Dataset (Processed by Craig Clouet, Esri) Raster dataset converted to polygon, April, 2017. Units represent the difference to Height Above Ellipsoid (HAE). Source: National Geodetic Survey (https://geodesy.noaa.gov/GEOID/), April 2017 Feb 2025 – per the Pacific Geodetic Advisor, Geoid12B is still the latest version of this data. Geoid18 does not apply to Hawaii or the Pacific Islands. For additional information, please see metadata at https://files.hawaii.gov/dbedt/op/gis/data/geoid_12b.pdf or contact Hawaii Statewide GIS Program, Office of Planning and Sustainable Development, State of Hawaii; PO Box 2359, Honolulu, Hi. 96804; Phone: [phone]; email: [e-mail]; Website: https://planning.hawaii.gov/gis.