First phase of the in site surveying concentrated on independent definition of coordinates from standpoints using the method of global navigation satellite system (GNSS) from which identical topographic points of DTMMO were consequently measured, intended for the topographic sheet positional accuracy testing.
p] are the original coordinates of detail topographic points and [x.
Geological Survey DEM data -- Instantaneous elevation data -- Vertical elevation profile graphs -- Waypoint and route creation tools -- Nationwide street maps, plus trails, lakes, rivers, topographic points
of interest -- Woodall's(R) Campgrounds database
For areas outside the United States, the full set of data--an enormous constellation of topographic points
about 30 horizontal meters apart--will be available only to the Defense Department and to scientists with certain security clearances.
It contains some of the most comprehensive databases available including nationwide street maps, trails, lakes, rivers, topographic points
of interest, Woodall's(R) Campgrounds database and a true digital elevation model (DEM) database derived from U.