10m Digital Elevation Model From National Elevation Dataset, Niwot Ridge LTER Project Area, Colorado

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 datum of NAD83, except for AK which is NAD27 Vertical datum of NAVD88,
except for AK which is NAVD29 Z units of meters NOTE: This EML metadata file does
not contain important geospatial data processing information. Before using any NWT
LTER geospatial data read the arcgis metadata XML file in either ISO or FGDC
compliant format, using ArcGIS software (ArcCatalog > description), or by viewing
the .xml file provided with the geospatial dataset.