National Geodetic Vertical Datum of 1929 (NGVD29) and the North American Vertical Datum of 1988 (NAVD88). Because Mexico started using the NAVD88 as its vertical datum in 2015, most of Mexico's data is referenced to the NGVD29 and recent high resolution data are referenced to the NAVD...
NAVD88 corrects many of the problems with NGVD29. The 1988 vertical datum was based on over 600,000 kilometers of control leveling performed since 1929 and reflects geological crustal movements or subsidence that may have changed benchmark elevation. If you were to perform surveys for floodplain ...
(CSRS)V7 NAP Napier NAVD_1988 NAVD88_depth NAVD88_depth_(ftUS) NAVD88_height_(ftUS) Nelson Nepal_Nagarkot WKID Area of Use 5714 115843 3900 5717 115702 115755 115756 115840 115841 115759 115760 115761 115762 115763 115830 115831 115832 115833 115834 115835 115836 5709 5765 5703 6357 ...
The following numbers represent the bias values of each datum after adopting an equatorial radius of 6378136.3m: England (-87 cm), Germany (4 cm), United States (NGVD29 (-26 cm)), NAVD88 (-72 cm), Australia AHD (mainland, -68 cm); AHD (Tasmania, -98 cm). A negative sign ...
Water level and marsh elevations (National Geodetic Vertical Datum, NGVD) before and during two (February 14–28 and March 12–28) Caernarvon experimental high-pulse flow events into Bret...