National Elevation Dataset

The National Elevation Dataset (NED) consists of high precision ground surface elevation data for the United States. It is maintained by the USGS and all the data are in public domain

Source

The NED dataset is a compilation of data from a variety of existing high-precision datasets such as LiDAR data (see also National LIDAR Dataset - USA), contour maps, USGS DEM collection, SRTM and other sources^[1] which were reorganized and combined into a seamless dataset, designed to cover all the United States territory in its continuity.

Formats

Data is available in a few popular formats such as ESRI ArcGRID, GeoTIFF, BIL, GridFloat, and a few others.

Precision

Depending on area location, the datasets are provided with 1/9 (about 3 meters), 1/3 (about 10 m) and 1-arcsecond (about 30 m) precision.

References

^ National Elevation Dataset FAQ, Sources [1]. Retrieved on 2008-08-31.

External links

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[1] National Elevation Dataset FAQ, Sources [1]. Retrieved on 2008-08-31.

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