References
. Free GIS data download
Geofabrik Download Server-Turkey GIS Data
OpenStreetMap
DIVA-GIS
USGS
. Notable Links
General Directorate Of Geographic Information Systems
General Directorate Of Maps
Turkey National Geographic Information Systems - TUCBS Turkey National Geographic Data Portal
MTA-Remote Sensing and Geographic Information Systems
Geographic Information Systems Branch office | TKGM
Anadolu University Geographic Information Systems
Istanbul University Geographic Information Systems
Esri Turkey
Process GIS
Başarsoft Information Technologies A.P. - Geographic Information Systems
Esri
Netcad Software A.P.