![]() When the 3DEP initiative became operational, the name “National Elevation Dataset” (and the abbreviation “NED”) were retired as the USGS elevation activities and data were rebranded under the 3DEP banner. In 2015, the 3D Elevation Program (3DEP) was initiated. and most of North America.įor over 15 years (1999–2014), the NED served as the flagship elevation product of the USGS. The NED contributes to the elevation layer of The National Map, and it provides basic elevation information for earth science studies and mapping applications in the U.S. The NED was developed as the logical result of the maturation of the long-standing USGS elevation program, which for many years concentrated on production of quadrangle-based digital elevation models (DEM). ![]() The NED is derived from diverse source datasets that are processed to a specification with consistent resolutions, coordinate system, elevation units, and horizontal and vertical datums. The NED provides seamless raster elevation data of the conterminous United States (CONUS), Alaska, Hawaii, U.S. Since its inception, the USGS has compiled and published topographic information in many forms, and the NED is a significant development in this long line of products that describe the land surface. The National Elevation Dataset (NED) is a primary elevation data product that has been produced and distributed by the U.S. ![]()
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