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Hi Folks, I'm not professionally trained but have been working with ArcGIS for 20+ years in environmental work. Been so long since I've had to do it I forgot how to do it and what it's even called. You have state-wide rasters of aerials and you can create a dbf IV file that has the file names in one column and then X/Y Max/Min in four other columns. Then I can just drag that into my map and it displays without having to load 150 files/layers. How did I do this? I did it with Sids before. Want to do Jp2 files and/or TIFF. Am working in 10.2. Making a raster catalog in a file geodatabase makes a file bigger than the images combined. Any help would be appreciative as I have about 30 field forms to go. John ------------------------------------------------------------------------- This list (NEARC-L) is an unmoderated discussion list for all NEARC Users. If you no longer wish to receive e-mail from this list, you can remove yourself by going to http://s.uconn.edu/nearcsubscribe.