-------- Original Message -------- Subject: Re: expressing scale of raster data for classification Date: Mon, 7 Apr 2014 17:50:21 -0400 (EDT) From: Paige G. Andrew <[log in to unmask]> To: Air Photo Maps, GIS Forum - Map Librarianship <[log in to unmask]> Jon, Just my 2 cents before I pack it in for the day and leave the details to someone else more expert with the digital stuff than I am. If creating a call number for a map /serial/ we don't use the abbreviated scale, we use the word "year" and then mark on the item which year it actually is. We use the abbreviated scale designation for map sets/series, either the actual one if known (e.g., s24 or s100 or s5000) or "svar" if the set/series has resources at different scales. Not sure if this is helpful at all but thought I'd share... Paige ------------------------------------------------------------------------ *From: *"Angie Cope, American Geographical Society Library, UW Milwaukee" <[log in to unmask]> *To: *[log in to unmask] *Sent: *Monday, April 7, 2014 5:34:58 PM *Subject: *expressing scale of raster data for classification -------- Original Message -------- Subject: expressing scale of raster data for classification Date: Mon, 07 Apr 2014 14:33:24 -0700 From: Jon Jablonski <[log in to unmask]> Reply-To: [log in to unmask] To: Maps, Air Photo, GIS Forum - Map Librarianship <[log in to unmask]> - A question for you catalogers out there. When creating LC class numbers for serial maps, we would generally follow the form: G 3201s E2 var E3 yyyy This would be a call number for a serial population map produced by Eastview, and each edition, since it's an annual, would be given a year extension on the end. BUT: this is the LandScan dataset. The scale is not at all variable. And it's certainly not 'scale not given' (which is how UC decided to catalog the online version). The scale is 30 arc seconds, or approximately 1 square kilometer pixels near the equator. All raster data is going to have scale given like this. There is no ratio scale. So how should we express the scale in a call number? I realize this is somewhat academic, but let's pretend I need to put a call number on a DVD and I have no choice but to classify this in the map call number range and I really don't want to break the classification system. -- Jon Jablonski Map & Imagery Laboratory Davidson Library UC Santa Barbara 805-893-4049 library.ucsb.edu/mil