The National Elevation Dataset (NED) is a seamless mosaic of best-available USGS elevation data. The 7.5-minute elevation data for the conterminous United States is the primary initial source 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 sells DEMs in the following formats: USGS DEM, Vertical Mapper GRD, DXF Mesh, GeoTIFF, ASCII XYZ, RockWorks, Terragen, and Surfer Grid (Binary or ASCII). 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.
MapMart has the most up-to-date
coverage available.
NED 10 Meter Price: $1 per 4 Sq. Miles
NED 30 Meter Price: $1 per 8 Sq. Miles Reprojecting into another projection or datum: FREE
Additional Costs : $10 for Compact Disk Shipping*
| UPS Ground | $7 | | UPS 2nd Day | $12 | | UPS Next Day | $27 | *Additional shipping charges may apply to orders outside the 48 conterminous United States
Rush services at additional cost
NED (National Elevation Dataset) 10 Meter Coverage Map NED (National Elevation Dataset) 30 Meter Coverage Map
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