The Evaluation and Monitoring of Annually Changes in Rural Cadastral Map with use of Geographical Information System Techniques

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

3) Land use changes
Land use changes are one of those cases that may be occurred through human activities as well as natural phenomena. Some of the annual changes are related to alternate cropping patterns. Another factor is related to changing farmland to other uses such as orchard or settlement and industrial sites. These changes usually occur very gradually. Maps number 3 and 4 show distribution of present land uses in the area. Assessment of land use maps using cross tab method show that about 8233 hectares of total land have been changed within one year. This change is about 18 percent of the whole area. Map number 5 shows distribution of changed area during 2002-2003.

Map no. 3: land use map of the study area in year 2002

Map no.4: land use map of the study area in year 2003

Map no. 5: Distribution of changed land uses within 2002- 2003
Different changes are categorized into following groups for better definition:

Changes in concern with alternate cropping: Such changes occur in the area due to annual cropping pattern. The area of this change type is about 29.69 hectares.
Changes related to orchard: This type of changes occupies about 21.31 hectares which occurred due to changing of agricultural land as well as rangeland to orchard.
Changes related to rang land and woodland: around 19.4 hectares of woodland have been changed to agricultural land and orchard.
Changes in relation to urban development: According to the results of present study about 3.66 hectares of the area belongs to this class that is occurred due to settlement and industries in the area. This class is mainly the result of changes occurred in orchards. Table no.1 compares different land use in 2002 and 2003.

Table no. 1 results of comparison between different land uses in 2002 and 2003

The table of land use changes clearly reflects that only 40% of occurred changes belong to alternate cropping. The remaining 60% is related to other land uses. Such changes occur in rural area every year due to lack of a valid policy in concern with land use changes. Therefore some drastic measurements are needed to control the situation; otherwise agriculture lands are going to change to other useless land uses in long term.

Conclusion and suggestion:
The results of present research disclosed that agriculture lands are due to annual changes. Precise updated maps are required to study and monitor all these changes. Therefore high-resolution satellite data as Ikonos and Quick Bird are needed to monitor the trend of changes. It will be time consuming and expensive if such study is conducted in small scale. Besides a continuous monitoring possibility satellite imageries will also reduce the time as well as expenses in these types of studies. Besides that land Information systems (LIS) is needed for better management of agriculture lands in rural area.

Reference

A.A. peyvandi, and M.Delavar "Evaluation of currency of urban cadastral maps using integration of remote sensing and GIS". Proceedings of Geomatic 80. Page 27 to 38, NCC, Iran (2001).
M.Ahadnejad "The assessment and monitoring land use change detection with use of multitemproal satellite imagery and GIS", Thesis of Master degree, Tarbiat Modaress University, Tehran, Iran (2000).
M.pourkamal "An introduction to cadastre and its dimensions", Tehran GIS center, (1996).
R. yosefi "Digital Cadastre" NCC, Iran (1997).
Piotr Cichocinski "Digital cadastral map in land information systems" , The Journal of European research libraries, vol.9(1999),No2

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