Content Description
Abstract: The USGS National Elevation Dataset (NED) has been developed by merging the highest-resolution, best-quality elevation data available across the United States into a seamless raster format. NED is the result of the maturation of the USGS effort to provide 1:24,000-scale Digital Elevation Model (DEM) data with NAD83 datum for the conterminous US and Hawaii, and 1:63,360-scale DEM data with NAD27 datum for Alaska.
Purpose: Geospatial elevation data are utilized by the scientific and resource management communities for global change research, hydrologic modeling, resource monitoring, mapping, and visualization applications.
Supplemental Information: USFWS, Region 5, performed additional processing steps on the USGS NED data to create individual DEM and hillshade files for each National Wildlife Refuge in the Northeast Region in NAD83, UTM.
Content Status
Progress: Complete
Update Frequency: As needed
Content Keywords
Theme Keywords: GCMD Parameter Keywords, National Wildlife Refuge boundary, EARTH SCIENCE, LAND SURFACE, TOPOGRAPHY, LANDFORMS, TERRAIN ELEVATION, 1-DEGREE DEM, 2-ARC-SECOND DEM, 7.5-MINUTE DEM, CARTOGRAPHY, DEM, DIGITAL ELEVATION MODEL, DIGITAL MAPPING, EDC, EROS, GEODATA, GIS, MAPPING, RASTER, USGS
Place Keywords: Blackwater National Wildlife Refuge - Barren Island Division, MD, Maryland, Northeastern United States