Originator: Complex Systems Research Center, University of New Hampshire
The USGS Hypsography files contain digital representations of the topographic contours
mapped on the USGS quadrangles. This USGS DLG (Digital Line Graph) data layer contains
a full range of attribute codes, has full topological structuring, and has passed
certain quality control checks. More information regarding USGS DLG data can be
found at http://edc.usgs.gov/guides/dlg.html.
Theme Keywords: Hypsography, Contours, Elevation, Topography, Digital Line Graphs