USGS NED 3, 10 and 30 Meter DEMs
Resolution: 3, 10 and 30 meterVertical accuracy: Within 4 meterProjection: UTM, Lat/Long, State PlaneDatum: NAD 27, 83, WGS 84Format: DEM, DXF, GeoTIFF, ASCII XYZ, Arc ASCII Grid, Terragen and SurferDates: 2001 - present
Email: MapMartInformation@harris.comPurchase by custom area
or call 303-759-5050 Option 2
Purchase an entire state (10 Meter)
Purchase an entire state (30 Meter)
The National Elevation Dataset (NED) is a seamless mosaic of best-available USGS elevation data. Full coverage exists in 10-meter and 30-meter resolution for the conterminous United States. The new LiDAR-derived NED at 3-meter resolution is rapidly being produced for the full country and US territories and protectorates as well.
The 7.5-minute elevation data for the conterminous United States is the primary initial source source data for the 10- and 30-meter data. In addition to the availability of complete 7.5-minute data, efficient processing methods were developed to filter production artifacts in the existing data, convert to the NAD83 datum, edge-match, and fill slivers of missing data at the quadrangle seams. One of the results of the NED processing is a much improved base of elevation data for calculating slope and hydrologic derivatives.
MapMart offers DEMs in the following formats: USGS DEM, Vertical Mapper GRD, DXF Mesh, Point and 3D Face, GeoTIFF, ASCII XYZ, RockWorks, Terragen, Surfer Grid (Binary or ASCII) and others. Some of these formats are available for immediate download by seamless custom area upon submittal of credit card and others can be generated at additional cost.
Geospatial elevation data set are utilized by the scientific and resource management communities for global change research, hydrologic modeling, resource monitoring, mapping, and visualization applications.