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What is NED 1/3 arc second?

April 26, 2017ARC NED

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What is NED 1/3 arc second?

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A. NED 1/3 arc second (~ 10 meter resolution) is processed and assembled the same as the NED 1 arc second, but the source data is 10 meter elevation data or higher resolution. There is not complete coverage of the United States. Only ~ 70% of the US has source 10 meter coverage. New NED 1/3 arc second data is updated when new 10 meter DEM’s or higher resolution data is received.