The Graphical Cadastre Problem in Turkey: The Case of Trabzon Province

Abstract

Cadastral projects in Turkey have been accelerated in recent years by the involvement of the private sector. These projects aim at completing the country's cadastre, along with producing bases in standards that could be a foundation for Land Registry and Cadastre Information System (LRCIS). It is possible to produce cadastral data with today's technological means. In this context, three dimensional cadastre data can be properly produced, especially in digital cadastre projects with the required point accuracy. Nevertheless this is not enough for LRCIS. The cadastre bases that have been produced so far by different methods with different scales and bases, with or without coordinates, should also be converted into digital form based on National Basic GPS Network of Turkey (NBGN) in required point-location accuracy. As the result of evaluation of graphical cadastre bases produced without coordinates, actual land measurements, and information obtained from sheets and field book data together, it was found out that there are significant base problems in the graphical maps. These bases, comprising 20% of Turkey's cadastre constitutes the most important bottleneck of completing the country's cadastre. In the scope of this paper, the possibilities of converting the field book measurement values of graphic cadastre bases into digital forms in national coordinate system by comparing them with actual land measurements are investigated, along with Turkey's Cadastre and its problems.

Progress of cost recovery on cadastre based on land management implementation in Turkey

“…Existing cadastre sheets were produced using different coordinate systems, scales, surveying methods, position accuracy, and sheet types (Demir and Ç oruhlu, 2008). Transformation of these insufficient maps into the sufficient maps will cause an extra cost on the Government Budget in Turkey.…”

“…However, to date, this plan has not been realised. In addition, existing cadastre sheets have been produced using different coordinate systems, scales, surveying methods, position accuracy, and sheet types (Demir and Ç oruhlu, 2008 (Demir, 2000). Cadastre projects have been sustained only by GDLRC except for forest.…”

“…In the period that followed, there were many reforms, including cadastre reforms, which started on a small scale in 1924. Till today, cadastre works have been carried out under different regulations and with various technological tools (Demir and Ç oruhlu, 2008). After the foundation of the Republic of Turkey, cadastre works were started in 1924 with the law numbered 474.…”

“…The first national cadastre target was specified in the First Five Year Development Plan in 1963, and it was planned that the Turkish cadastre works would be finished in 20 years. However, to date, this work has not been completed (Demir and Ç oruhlu, 2008). Since the year 2004 till date, cadastre projects in Turkey have been accelerated by the involvement of the private sector in terms of supported by World Bank (WB).…”

“…Nevertheless, this is not enough for LRCIS. The cadastre maps that have been produced so far by different methods with various scales and bases, with or without coordinates, should also be converted into digital form based on the National Basic GPS Network of Turkey (in Turkish TUTGA) in required point accuracy (Demir and Ç oruhlu, 2008). Turkish cadastre has two different cadastre periods: written and geometrical cadastre periods.…”