ISTANBUL MAPS

1) http://sehirrehberi.ibb.gov.tr General Istanbul Map of the Municipality 

2)   http://gis.iett.gov.tr/map.asp : search for addresses either by clicking on the map or by writing into the boxes on the right the following:
 
Cadde sokak : street address
Mahalle : the name of the area if you know it
Ilçe : choose the name of the district from the list
 
You can get the bus routes in the same site 
  
3) Architectural Guide To Istanbul : http://www.e-harita.gen.tr/istarchguide/
This excellent map comprises of all points of interest, transportation and street addresses sorted out in layers
 
4) http://www.istanbul.net.tr/istanbul_harita.asp : there are two maps here ; Flash and HTML
map. In the flash map, you can make searches by writing the street name in the box “arama” 
  

Dictionary for the Map:
 
Remove Layer: Katmani Kaldir
Show Layer : Katmani Göster
 
Adres: Address
Tür: Type
Yol Analizi: Finding your way
IETT: Bus routes
Some of the Important Layers:
 
Binalar: Buildings
Kapi numaralari : Building Numbers
Mezarliklar: Cemetaries
Uydu Görüntüsü: Satellite Image
Yesil Alan: Parks
Yollar: Streets
 
Alisveris: Shopping
Dini tesisler: Religious Places
Konsolosluk: Embassies
Rayli Ulasim: Rail Lines