National Elevation Dataset
Encyclopedia
The National Elevation Dataset (NED) consists of high precision ground surface elevation data for the United States
. It is maintained by the USGS and all the data are in public domain
data (see also National LIDAR Dataset - USA), contour
maps, USGS DEM
collection, SRTM and other sources which were reorganized and combined into a seamless dataset, designed to cover all the United States territory in its continuity.
ArcGRID, GeoTIFF
, BIL
and a few others
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...
. It is maintained by the USGS and all the data are in public domain
Public domain
Works are in the public domain if the intellectual property rights have expired, if the intellectual property rights are forfeited, or if they are not covered by intellectual property rights at all...
Source
The NED dataset is a compilation of data from a variety of existing high-precision datasets such as LiDARLIDAR
LIDAR is an optical remote sensing technology that can measure the distance to, or other properties of a target by illuminating the target with light, often using pulses from a laser...
data (see also National LIDAR Dataset - USA), contour
Contour line
A contour line of a function of two variables is a curve along which the function has a constant value. In cartography, a contour line joins points of equal elevation above a given level, such as mean sea level...
maps, USGS DEM
USGS DEM
The USGS DEM standard is a geospatial file format developed by the United States Geological Survey for storing a raster-based digital elevation model. It is an open standard, and is used throughout the world...
collection, SRTM and other sources which were reorganized and combined into a seamless dataset, designed to cover all the United States territory in its continuity.
Formats
Data is available in a few popular formats such as ESRIESRI
Esri is a software development and services company providing Geographic Information System software and geodatabase management applications. The headquarters of Esri is in Redlands, California....
ArcGRID, GeoTIFF
GeoTIFF
GeoTIFF is a public domain metadata standard which allows georeferencing information to be embedded within a TIFF file. The potential additional information includes map projection, coordinate systems, ellipsoids, datums, and everything else necessary to establish the exact spatial reference for...
, BIL
ArcView
ArcView 3.x was a geographic information system software product produced by ESRI.-History:ArcView started as a graphical program for spatial data and maps made using ESRI's other software products. Over time more and more functionality was added to ArcView and it became a real GIS program capable...
and a few others