-------- Original Message -------- Subject: Problems downloading and displaying DRG file in ArcGIS Date: Tue, 9 Mar 2010 16:04:03 -0700 From: Kollen, Chris <[log in to unmask]> To: [log in to unmask] <[log in to unmask]> Hi everyone: I’m helping a graduate student from the Tree Ring Lab here at the UA download and view a DRG file in ArcGIS. I’ve never had problems doing this before, so I’m stymied about what’s going on. She wants to use the 7.5’ DRG for Blanco Mtn in California. I originally found the Libre Map Project site at http://libremap.org/data/state/california/drg/ and we downloaded the .tif and .tfw files for Blanco Mtn but they won’t load in ArcMap, although the files are there in the directory. Then I found the California Atlas geospatial data download site for DRGs at http://atlas.ca.gov/imagerySearch.html . We downloaded the tif and the aux files, but again when we try to open them up in ArcGIS, nothing shows up in the directory (although the files are there). Is anyone familiar with downloading DRG files from either one of these sites and have any idea on what I’m doing wrong? Thanks Chris Chris Kollen Research Support Services Librarian University of Arizona Library P.O. Box 210055 Tucson, AZ 85721-0055 [log in to unmask] 520-621-4869