http://www.tagem.gov.tr/gis/index.htm

http://www.ggit.metu.edu.tr

http://www.ins.itu.edu.tr/uzak

http://www.gislab.ktu.edu.tr

http://www.anadolu.edu.tr/akademik/yo_uydu

http://www.islem.com.tr

http://www.landsat.org

http://www.esri.com

http://www.netcad.com

http://gcmd.nasa.gov/Resources/pointers/GIS_Agencies.html