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  2. Orthometric height - Wikipedia

    en.wikipedia.org/wiki/Orthometric_height

    The orthometric height (symbol H) is the vertical distance along the plumb line from a point of interest to a reference surface known as the geoid, the vertical datum that approximates mean sea level. [1][2] Orthometric height is one of the scientific formalizations of a layman's "height above sea level", along with other types of heights in ...

  3. North American Vertical Datum of 1988 - Wikipedia

    en.wikipedia.org/wiki/North_American_Vertical...

    Geodesy. 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]

  4. Height above mean sea level - Wikipedia

    en.wikipedia.org/wiki/Height_above_mean_sea_level

    Height above mean sea level is a measure of a location's vertical distance (height, elevation or altitude) in reference to a vertical datum based on a historic mean sea level. In geodesy, it is formalized as orthometric height. The zero level varies in different countries due to different reference points and historic measurement periods.

  5. U.S. National Geodetic Survey - Wikipedia

    en.wikipedia.org/wiki/U.S._National_Geodetic_Survey

    The North American-Pacific Geopotential Datum of 2022 (NAPGD2022) will separately define the height system of the United States and its territories, replacing NAVD88. [3] It will use a geoid model accurate to 1 centimeter (0.4") to relate orthometric height to ellipsoidal height measured by GPS, eliminating the need for future leveling projects.

  6. Step aerobics - Wikipedia

    en.wikipedia.org/wiki/Step_aerobics

    Step aerobics, also known as bench aerobics and step training, [1] is a form of aerobic exercise that involves stepping on and off a small platform. Step aerobics was studied by physiologists in the 1980s, and in 1990 it swiftly grew in popularity in the U.S. as a style of health club exercise, largely because of promotion by Reebok of the Step ...

  7. National Geodetic Vertical Datum of 1929 - Wikipedia

    en.wikipedia.org/wiki/National_Geodetic_Vertical...

    The National Geodetic Vertical Datum of 1929 is the official name since 1973 [1] of the vertical datum established for vertical control surveying in the United States of America by the General Adjustment of 1929. Originally known as Sea Level Datum of 1929, NGVD 29 was determined and published by the United States Coast and Geodetic Survey [2 ...

  8. Vertical datum - Wikipedia

    en.wikipedia.org/wiki/Vertical_datum

    In geodesy, surveying, hydrography and navigation, vertical datum or altimetric datum is a reference coordinate surface used for vertical positions, such as the elevations of Earth-bound features (terrain, bathymetry, water level, and built structures) and altitudes of satellite orbits and in aviation. In planetary science, vertical datums are ...

  9. How NIL is transforming college gymnastics and attracting ...

    www.aol.com/nil-transforming-college-gymnastics...

    The framework of gymnastics, at both the collegiate and elite levels, immediately shifted. The gymnastics performed by the U.S. national team at world championships and the Olympics is called ...

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