International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B4. Istanbul 2004 
  
FAULT, RIGHT LATERAL STRIKE-SLIP, DEFINITE, YES" 
is copied to the ram. User pastes it to the field of captured 
feature. It saves time because the user does not repeatedly write 
the same string every time when the same feature is met. The 
ability to make a mistake is also decreased wth this tool. 
In this project ARCVIEW shape format is used to export 
digitized data as NDSMap digitization software supports it. 
At the end of digitization, point layer containing the name of 
formations and a line layer containing all other features for each 
map sheet is exported. The next step is to import those layers 
into the GIS and to pick the dip-strike measurements, tectonic 
features and formation boundary information to separate layers 
which is much simpler and easier than before because of the 
standardized explanation of all features. 
4. CONCLUSION 
To convert digitized geological map sheets into GIS is a time 
consuming and difficult process when there is many map sheets 
and more than one digitizing person. The standardization of 
digitization is necessary in such cases. The GFAI presented 
here standardize the resultant digitized data and decrease the 
user intervention and hence decrease the possibility to make 
mistakes while digitization. 
The 80 map sheets of Thrace Basin (NW of Turkey) are 
digitized using the GFAI and all of them were converted into 
GIS (Fig. 7). 
  
Figure 7. 80 Map sheets of Thrace Basin digitized which were 
digitized using the GFAI. Different colours show sheets 
digitized by different person. 
ACKNOWLEDGEMENT 
We appreciate the kind staff who digitized the geological maps 
in this project; Emine Bulun, Yesim Süven and Mualla Ertung; 
and also Mr. Muzaffer Siyako and his co-workers who 
interested in this project and supervised, controlled, and 
compiled the geological maps of the area. We also give our 
thanks to all TPAO geologists who worked at the field in this 
arca. 
REFERENCES 
Lane, D.E., Donatich, A., Brunstein, F.C., Shock, N.A., 1999, 
Digital Geological Map Production and Database Development 
in the Central Publications Group of Geological U.S. 
Geological Survey, Digital Mapping Techniques '99 — 
676 
Workshop Proceedings, U.S. Geological Survey Open-File 
Report | 99-386.  http://pubs.usgs.gov/ol/of99-386/lanc.html 
(accessed 28 Apr. 2003) 
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