CI PA 2003 XIX th International Symposium, 30 September - 04 October, 2003, Antalya, Turkey 
As mentioned before, there are also some difficulties 
concerning GIS which are faced with during this study, such as: 
• incompatibility of the precision of the utilized data sources 
with the precision provided by GIS, 
• impossibility of querying more than two spatial data at a 
time, as a result of which the procedures of analysis 
increase due to repeating the same analysis many times, 
• not having advanced drawing and editing capabilities as 
such a detailed study requires. 
To conclude, it is possible to state that assessment of historical 
stratification by using GIS will support the conservation 
decision-making process and consequently will contribute to the 
conservation of multi-layered towns. GIS, defined as the major 
tool, are considerably compatible with such a study. However, 
standard GIS softwares reveal some problems, which need to be 
studied further and solved in association with GIS analysts and 
programmers. 
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Acknowledgements: 
Special thanks are due to Prof. Dr. Cevat Erder, for his 
constitutive, insightful comments and long term support as the 
supervisor of this study. 
Thanks are due to ‘I$LEM Geographic Information Systems 
and Engineering Limited’, for sponsoring ArcView GIS and for 
providing continuous technical support.