----- Forwarded Message ----- From: "Chieko Maene" <[log in to unmask]> To: [log in to unmask] Sent: Tuesday, June 9, 2009 7:32:22 PM GMT -06:00 US/Canada Central Subject: Re: Maps of Wheat Cultivation in Tanzania Don't know if you came across these but, http://www.fao.org/landandwater/agll/agromaps/interactive/page.jspx FAO Agro-MAPS offers area summary/aggregated crop data at admin 1 level by crop type, including wheat, between 1991 and 2001 (plus unknown "most recent" year) for Tanzania. If you need spatial & boundary data to match with the data table, you can perhaps get that from either (1) FAO - Africover, or (2) USGS Africa Data Dissemination Service, Digital Map Data, or (3) GADM (http://www.maplibrary.org/stacks/gadm/index.php) To find more specific wheat cultivated area, I guess s/he can use Landsat (though 2003-present images have a sensor problem, i.e. SLC-off effects) and then perform classification analysis - kind of like creating USDA/NASS CDL (cropland data layer) dataset, which I've never done. AWiFS (http://earth.esa.int/object/index.cfm?fobjectid=1659) is another data source mentioned in various cropland analysis papers - but it doesn't look like the data is freely available. Too bad - Chieko Maps-L Moderator wrote: > -------- Original Message -------- > Subject: Maps of Wheat Cultivation in Tanzania > Date: Tue, 9 Jun 2009 13:00:17 -0700 (PDT) > From: Kathy Stroud <[log in to unmask]> > To: Air Photo Maps-L <[log in to unmask]> > > > > Hello all, > > I'm finding this one tricky. I'm looking for current maps or GIS/remote > sensing data that shows where wheat is being cultivated in Tanzania. The > information needs to be relatively current because agricultural patterns > have apparently changed in recent years. > > Any leads would be helpful. > > Thanks, > > Kathy Stroud, Map/GIS Librarian > Biological/Agricultural Sciences and Map Services, Shields Library > 100 NW Quad Ave. > Davis, CA 95616-5292 > 530-752-5248 -- Chieko Maene, MS, MLIS Maps & State Documents Librarian Government and Geographic Information and Data Services University Library Northwestern University 1970 Campus Drive Evanston, IL 60208-2300 Phone: (847) 467-3679 Fax: (847) 491-7603 [log in to unmask] http://www.library.northwestern.edu/map/ http://geospatial.edublogs.org/