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What happened to the North American vertical datum of 1988?
What is a vertical datum?
Is a vertical datum just a reference surface?
What is a North American Datum?
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.
- North American Datum - Wikipedia
Vertical measurements, based on distances above or below...
- North American Vertical Datum of 1988 - Simple English ...
The North American Vertical Datum of 1988 (NAVD 88) is a...
- North American Datum - Wikipedia
Jul 12, 2018 · North American Vertical Datum of 1988 (NAVD 88) consists of a leveling network on the North American Continent, ranging from Alaska, through Canada, across the United States, affixed to a single origin point on the continent. In 1993 NAVD 88 was affirmed as the official vertical datum in the National Spatial Reference System (NSRS) for the ...
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- Quebec, Canada
- Pointe-au-Pere, Rimouski
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Nov 4, 2020 · 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.
Find information on this topic from the Massachusetts Office of Coastal Zone Management (CZM). A vertical datum is a reference system used by surveyors, engineers, and mapping professionals to measure and relate elevations to the Earth's surface.
This constraint satisfies the requirements of shifting the datum vertically to minimize the impact of NAVD 88 on U.S. Geological Survey mapping products, and provides the datum point desired by the IGLD Coordinating Committee for IGLD 85.
