North American Vertical Datum of 1988

The North American Vertical Datum of 1988 (NAVD 88) is the vertical datum for orthometric heights established for vertical control surveying in the United States of America based upon the General Adjustment of the North American Datum of 1988.[1]

It superseded the National Geodetic Vertical Datum of 1929 (NGVD 29),[2] previously known as the Sea Level Datum of 1929.

NAVD 88, along with North American Datum of 1983 (NAD 83), is set to be replaced in 2025 with a new geometric reference frame and geopotential datum, based on GPS and gravimetric geoid models.[3]

  1. ^ US Department of Commerce, National Oceanic and Atmospheric Administration. "North American Vertical Datum of 1988 (NAVD 88) - Vertical Datum - Datums - National Geodetic Survey". www.ngs.noaa.gov. Retrieved 2022-02-01.
  2. ^ US Department of Commerce, National Oceanic and Atmospheric Administration. "National Geodetic Vertical Datum of 1929 (NGVD 29) - Vertical Datum - Datums - National Geodetic Survey". www.ngs.noaa.gov. Retrieved 2022-02-01.
  3. ^ US Department of Commerce, National Oceanic and Atmospheric Administration. "New Datums - National Geodetic Survey". www.ngs.noaa.gov. Retrieved 2022-02-01.