Tag Info

New answers tagged


One could use either kind of latitude to locate points on the WGS 84 ellipsoid (used by the NED) or any other ellipsoid, but "everybody knows" that the values will always be given as geodetic latitudes. However, it is surprisingly hard to find an authoritative statement to that effect! Before we go on, it helps to understand that although a datum like the ...


The answer is given in the metadata. Geographic coordinate system Horizontal datum of NAD83, except for AK which is NAD27 Both versions of NAD (North American Datum) are geodetic systems.


NAD 83 is the datum used to define the "geodetic" network in North America. NAVD 88 was established in 1991 by the minimum-constraint adjustment of "geodetic" leveling observations in Canada, the United States, and Mexico

Top 50 recent answers are included