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Author
U.S. Geological Survey
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Subject
Elevation
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Collection
Pennsylvania Spatial Data Access (PASDA)
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Place
District Of Columbia, United States
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1. 1:24,000 - 7.5 minute digital elevation models (DEM) for the District of Columbia (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...