This data set originated as a Digital Raster Graphic (DRG) produced from a scanned USGS topographic map. The DRG included the collar information and was georeferenced to the UTM grid. The current data set has been modified to remove the collar information and has been georeferenced to UTM Zone 12 to be incorporated into a seamless dataset for the Bureau of Land Management. The decollared DRGs have been mosaiced into an image pyramid using Gdal (1.9.2) software utilities to be served in GeoServer.
