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BLM REA MIR 2011 ned10m13 90m

Summary

The U.S. Geological Survey has developed a National Elevation Dataset (NED). The NED is a seamless mosaic of best-available elevation data. The 7.5-minute elevation data for the conterminous United States are 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 quadrangle seams. One of the effects of the NED processing steps is a much-improved base of elevation data for calculating slope and hydrologic derivatives. The specifications for the NED 1 arc second and 1/3 arc second data are: Geographic coordinate system, Horizontal [...]

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Identifiers

Type Scheme Key
sourceSystem urn:x-esri:specification:ServiceType:ArcIMS:Metadata:DocID {D125A6C0-9936-42D8-8AC3-90E22F7526E9}

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