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7.5 minute Digital Raster Graphics for Pennsylvania - cropped collars


Title:7.5 minute Digital Raster Graphics for Pennsylvania - cropped collars
Originator:U.S. Geological Survey
Publication Date:1996
Abstract:
A Digital Raster Graphic (DRG) is a raster image of a scanned USGS topographic or planimetric map with cropped collars, georeferenced to the UTM grid.