North American Vertical Datum of 1988
The North American Vertical Datum of 1988 (NAVD 88) is a geodetic reference system used for measuring elevations in North America. It replaced the older National Geodetic Vertical Datum of 1929 (NGVD 29) and provides a standardized framework for mapping and surveying projects.
North American Vertical Datum Of 1988 Media
Illustration of vertical datums in the United States
An unusual vertical datum marker at a shoreline street end in Seattle
