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USGS Topographic Maps
Dataset Basics The Digital Raster Graphic (DRG) is a scanned, digital image of a US Geological Survey (USGS) standard series topographic map. The original DRG images included the full map extent and surrounding map collar information. To produce the DRGe product, the USGS removed map collars and appended portions of surrounding map images to create rectangular images which are suitable for seamless tiling in a geographic information system. The ISDP archive includes the following map series:
Download free GeoPDF versions of topo maps from the USGS Store. ESRI ArcGIS UsersBuilding pyramids on a DRG may corrupt the color ramp associated with the TIFF and cause the image to be displayed without color. If this occurs, simply delete the pyramid file (extension .rrd) to view the image with an appropriate color ramp. If ArcGIS asks if you would like to build pyramids, select No. File FormatCoordinate System: UTM, Zone 16 North
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