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System Status »»
National Elevation Dataset 1/3 Arc-Second (NED 1/3)
NED 1/3 Arc-Second covers approximately 95 percent of the conterminous United States and Hawaii. However, the source data with a resolution of 10-meters or better currently exists for only 66 percent of that area. A portion of the current 1/3 arc-second NED coverage is derived from oversampling of 30-meter Digital Elevation Model (DEM) source data. The NED spatial metadata explains the source data used to produce the 1/3 arc-second NED over any given area. This is a seamless product updated bimonthly to incorporate the best available DEM.
Service Access List
Data Availability (graphic)
Specifications
Resolution
Projection
Horizontal Datum
Vertical Datum
Vertical Units
Format
Coverage
1/3 arc-second (approx. 10m)
Geographic
NAD83 - Cont.U.S., HI, and portion of AK
NAVD88
Meters
ArcGrid, Bil, Bil_1 Integer, TIFF, GridFloat
Conterminous U.S., HI, and Portions of AK
U.S. Department of the Interior |
U.S. Geological Survey
