-------- Original Message -------- Subject: RE: Problems downloading and displaying DRG file in ArcGIS Date: Thu, 11 Mar 2010 09:24:54 -0800 From: Godfrey, Bruce <[log in to unmask]> To: Maps, Air Photo, GIS Forum - Map Librarianship <[log in to unmask]> References: A<[log in to unmask]> The files appear to have a .tiff extension. If you rename the extension to .tif ArcGIS should "see" it. -Bruce Bruce Godfrey GIS Specialist Library University of Idaho Coeur d'Alene 1031 N. Academic Way, Suite 242 Coeur d'Alene, Idaho 83814-2277 E-mail: [log in to unmask] Phone: (208) 292-1407 Fax: (208) 664-1272 -----Original Message----- From: Maps, Air Photo, GIS Forum - Map Librarianship [mailto:[log in to unmask]] On Behalf Of Angie Cope Sent: Thursday, March 11, 2010 7:20 AM To: [log in to unmask] Subject: Problems downloading and displaying DRG file in ArcGIS -------- 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