| Digital Raster Graphics |
Digital Raster Graphics are scanned and
georeferenced USGS Quadrangles. They are made up of two files-- a .tif and
a .tfw. The .tif files contain the image data, and the .tfw contains
georeferencing data. both of these files need to be downloaded to work
properly with some software packages. A third file, .prj defines the projection
for use with ArcGis iv 8.x These images are georeferenced to the
UTM Zone 17, NAD83 datum.
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Download by quadrangle name |
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