National Elevation Dataset

The USGS National Elevation Dataset (NED) was developed by merging the highest resolution, best quality Digital Elevation Model (DEM) data available across the United States into a seamless raster format.  As of the fall of 2003, 30-meter digital elevation data exist for the conterminous United States, with various scales for Alaska, Hawaii, and U.S. Territories.  NED are being improved to include 10-meter resolution data. For additional information, USGS provides a NED fact sheet, methodology, standards, accuracy, and metadata.

Data Sources

• USDA Geospatial Data Gateway
• USGS National Map Seamless Data Distribution System
  Data are delivered in ArcInfo grid or raster (.bil) format in files of 100 MB or less.