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What does NAVD 88 stand for?
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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.
Oct 29, 2023 · Commonly used vertical datums in North America are the National Geodetic Vertical Datum of 1929 (NGVD29) and the North American Vertical Datum of 1988 (NAVD88). A (vertical) geodetic datum often ties in tidal datums.
The NAVD 88 used some of the original data from 1929 but also re-leveled about 100,000 km. Originally scheduled to be completed in 1988, it was finished on June 15, 1991. The new datum produced fewer distortions than earlier vertical datums and more accurate elevations, according to Remondi.
May 23, 2024 · A vertical datum is used to determine height measurements. While horizontal datums pinpoint locations on the Earth’s surface, a vertical datum is used to determine elevation data. When using a vertical datum, points can be described as being above or below mean sea level.
NAD 83 and NAVD 88, although still the official horizontal and vertical datums of the National Spatial Reference System (NSRS), have been identified as having shortcomings that are best addressed through defining new horizontal and vertical datums.
Mar 18, 2024 · In the United States, for the most part, these vertical datums have the average sea level represented at an elevation of 0.00’. The North American Vertical Datum of 1988 (NAVD88) is the current vertical datum for the contiguous United States and Alaska.
Oct 12, 2010 · • Example: North American Vertical Datum of 1988 (NAVD 88) • Definition: The surface of equal gravity potential to which orthometric heights shall refer in North America*, and which is 6.271 meters (along the plumb line) below the geodetic mark at “Father Point/Rimouski” (NGSIDB PID TY5255).
