3.4.5. Meanwhile for applications purposes, 
resection method also had been made use of. Since 
the digital map coordinates of wall corners, roof 
corners or other sharp points were already known, 
the coordinate of resection points were found 
easly by using electronic tacheometer. According 
to the tests results position error, m, - t 6 cm. 
has been found on these resection points. 
By means of these resection points, application of 
some new points which are known on the map, were 
also made easily on the terrain. 
On the other hand for updating purposes some new 
points on the terrain were also measured with the 
help of these resection points and maps were 
completed very quickly. 
So it has been seen that, the application quality 
and map completion (updating) capability of these 
maps were very high. And they were very suitable 
for the thecnical specification which is 
compatible with international standarts. 
4. CONCLUSIONS 
The accuracy and the quality of these maps largely 
fulfill the standard requiremets of the technical 
specification. 
196 
and verbal 
a"base-map" 
These digital maps can give graphical 
data easily. So, they can be used as 
for land information system. 
It is easily possible to transfer old maps data 
and cadastral data to these digital maps. 
It can be said that these digital maps may easily 
be updated and used for application purposes. 
REFERENCES 
1/ ALKIS,A., SAGAY,Z., KOYUNCU,D., Photogrammetric 
Digital Mapping for Istanbul Land Information 
System. ISPRS 16. International Congress, 1-10 
July, 1988 Kyoto-Japan. 
2/ ALKIS,A.,EVRANUZ,C.,ÓRÜKLÜ,H.E., Istanbul Land 
Information System. ISPRS 16. International 
Congress, 1-10 July, 1988 Kyoto-Japan. 
3/ ALKIS,A., ORUKLU,H.E., BATUK,G., BAYRAM,B., 
Experiences on the Photogrammetric Digital 
Mapping for Istanbul Land Information System 
ISPRS 17. International Congress, 2-14 August 
1992, Washington-USA. 
4/ JOHANSEN, I.M., Digital Mapping in 
Experiences from An Accuracy Test. 
Institute of Technology, Division 
Photogrammetry 
Norway- 
Norwegian 
of Geodesy- 
  
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