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The Evaluation and Monitoring of Annually Changes in Rural Cadastral Map with use of Geographical Information System Techniques A case study in khosheh Mehre agricultural lands, Eastern Azerbaijan, Northwestern Iran
Material and methods:
Aerial photo of 1:10000 scale were used to prepare cadastral maps in the area. First of all the photos were transformed and interpreted. Then attributes for different land segments were assigned using ground truth field data. Finally GIS based database were created and also the prepared maps were updated through fieldwork. Consequently overall changes were evaluated using cross tabulation method. The following chart shows major steps of the research.  Fig 1: Flow chart showing the major steps of research Evaluation and assessment of changes: Different kinds of changes in terms of geometric as well as non-geometric changes (attribute) were evaluated considering the aim of study from the following point of view: 1) Changes occurred in shape and number of land parcels The results of study revealed that the number of agricultural land parcels have been increased from 349 in 2002 to 406 in 2003. Also the average areas of parcels have changed from 8666 in to 9876 within this period. The main reason for such a change may be seeked in two factors. The first is the Islamic heritage law in our country that results to splitting of land parcels into small sizes after a few generations. The small size land parcels are less valued from agriculture point of view. The other reason is the poverty in rural area that makes the people to sell part of their lands to compensate their living expenses. Map 1 shows distribution of agricultural lands, which were changed in shape and size within year 2002-2003.  Map 1 shows distribution of agricultural lands that were changed in shape and size within year 2002-2003 2) Ownership changes: The comparison of ownership data reveals that 75 pieces of land parcels from 406 agriculture lands have been changed within this period. The major reason for these changes is unregistered deals made by the local farmers. Map number 2 shows the distribution of the changes occurred in the farmlands. With comparison of this map and the map number 1 it may be concluded that ownership changes has a high as well as direct relation with changes of farm land shape so that most changes have been occurred among the neighboring parcels.  Map no 1: distribution of farmlands that their ownership has Been changed during year 2002 – 2003 |