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You searched for: Author U.S. Geological Survey Remove constraint Author: U.S. Geological Survey Subject Elevation Remove constraint Subject: Elevation Collection Pennsylvania Spatial Data Access (PASDA) Remove constraint Collection: Pennsylvania Spatial Data Access (PASDA) Place Virginia, United States Remove constraint Place: Virginia, United States
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1. 1:24,000 - 7.5 minute digital elevation models (DEM) for Virginia (30 meter)

2000. U.S. Geological Survey. Digital Elevation Model (DEM) is the terminology adopted by the USGS to describe terrain elevation data sets in a digital raster form. The standard...