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1. www.vdatum.noaa.gov › vdatumwebOnline VDatum: Vertical Datums Transformation

   www.vdatum.noaa.gov › vdatumweb

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   Web VDatum is designed to vertically transform geospatial data among a variety of tidal, orthometric and ellipsoidal vertical datums - allowing users to convert their data from different horizontal/vertical references into a common system and enabling the fusion of diverse geospatial data in desired reference levels.

   • Vertical Datum

     The North American Vertical Datum of 1988 (NAVD 88) is the...

   • Datum Tutorial

     The NAVD 88 is based on an adopted elevation at Point...

   • Vertcon 3.0

     What is VERTCON 3.0? VERTCON 3.0 was a project whose intent...

2. www.asce.org › publications-and-news › civilGetting the height right: The North American Vertical Datum ...

   www.asce.org › publications-and-news › civil

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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.

3. People also ask

   What is NAVD 88?

   • In 1993 NAVD 88 was affirmed as the official vertical datum in the National Spatial Reference System (NSRS) for the Conterminous United States and Alaska (see Federal Register Notice (FRN)). Although many papers on NAVD 88 exist, no single document serves as the official defining document for that datum.

   North American Vertical Datum of 1988 (NAVD 88)

   www.ngs.noaa.gov/datums/vertical/north-american-vertical-datum-1988.shtml

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   When will NAVD 88 be replaced?

   • 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. Illustration of vertical datums in the United States.

   North American Vertical Datum of 1988 - Wikipedia

   en.wikipedia.org/wiki/North_American_Vertical_Datum_of_1988

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   Is NAVD 88 biased or tilted?

   • Based on the more recent surveying techniques and data, it was determined that NAVD 88 is both biased (by about 0.5 meters (1 ft 8 in)) and tilted (about 1 meter (3 ft 3 in) coast to coast).

   North American Vertical Datum of 1988 - Wikipedia

   en.wikipedia.org/wiki/North_American_Vertical_Datum_of_1988

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   What is the difference between igld 85 and NAVD 88?

   • The IGLD 1985 is the current vertical control reference system that defines water levels within the Great Lakes - St. Lawrence River system. The reference zero point of IGL 1985, the point to which all other elevations are referenced, is located at Father's Point, Rimouski, Quebec, Canada. Therefore, the IGLD 85 and NAVD 88 are one and the same.

   NOAA/NOS's VDatum: A tutorial on datums

   vdatum.noaa.gov/docs/datums.html

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4. en.wikipedia.org › wiki › North_American_VerticalNorth American Vertical Datum of 1988 - Wikipedia

   en.wikipedia.org › wiki › North_American_Vertical

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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.

5. vdatum.noaa.govNOAA/NOS's VDatum 4.6.1: Vertical Datums Transformation

   vdatum.noaa.gov

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   VDatum is a free software tool being developed jointly by NOAA's National Geodetic Survey (NGS), Office of Coast Survey (OCS), and Center for Operational Oceanographic Products and Services (CO-OPS).