US Geological Survey

US Geological Survey

National Elevation Dataset (NED) DEM

The National Elevation Dataset (NED) is the primary elevation data product of the USGS. The NED is a seamless dataset with the best available raster elevation data of the conterminous United States, Alaska, Hawaii, and territorial islands. The National Elevation Dataset (NED) is a raster product assembled by the U.S. Geological Survey (USGS). Designed to provide National elevation data in a seamless form with a consistent datum, elevation unit, and projection.

In most of Alaska, only lower resolution source data are available. As a result, most NED data for Alaska are at 2-arc-second (about 60 meters) grid spacing. Part of Alaska is available at the 1- and 1/3-arc-second (~10m) resolution. Data corrections are made in the NED 1/3 Arc Second assembly process to minimize, but not eliminate, artifacts, perform edge matching, and fill sliver areas of missing data.

NED data sources have a variety of elevation units, horizontal datums, and map projections. In the NED assembly process the elevation values are converted to decimal meters as a consistent unit of measure, NAD83 is consistently used as horizontal datum, and all the data are recast in a geographic projection.

Data and Resources

  • Download
    USGS National Map Viewer and Download Tool

    viewer

  • Download
    Download :: USGS National Map Viewer and Download Tool

    http://viewer.nationalmap.gov/viewer/

  • View website
    Website :: USGS National Map: Elevation

    http://nationalmap.gov/elevation.html#data

Status: Remote
Type: Data
Data Types: GIS
Primary Agency
US Geological Survey
Type
Federal

ISO Topics
elevation

Geo-keywords
Alaska, Northslope Borough

Collection
GIS Data

Source Portal
North Slope Science Catalog ::

Direct Record Link
http://northern.epscor.alaska.edu/catalogs/257-national-elevation-dataset-ned-dem
Top