Cadastre, 3D Cadastre, Visualization System, Data Model
Tirsit Lisanework Alemu, Solomon Dargie Chekole
The global land institutions have increasingly recognized the need to work towards practical, integrated, and scalable implementation of alternative methods to cadastral surveying. Cadastral surveying is a land management and land administration tool to provide a safe and reliable real property registration system. In this regard, an integrated survey is one of the alternatives that combine Differential GPS and Total Station to be used as a single instrument, called SmartStation. The aim of the study is to investigate the accuracy/precision, and time expenditure among Differential GPS, Total Station and Smart-Station. To investigate this objective, both primary and secondary data were collected and analyzed through mixed approach. The study benchmarked a network consisted of nine control points that were selected purposely to avoid satellite obstructions. The reference network was established by Total Station to be served as a reference (true value) for the test of Smart-Station and GPS-RTK. To increase accuracy and reliability of the reference network, control points were measured with two-face measurements. Accordingly, the precision of reference network is 9.4mm which is acceptable according to the tolerance value estimated. Based on this, accuracy, and time expenditure of the three methods were tested on all control points. A confidence level of 95% was used to ascertain reliability of the measurements. Despite a few differences, the result shows that accuracy of all measured points fall within the confidence level. Hence, an integrated survey approach was obtained to be better in terms of the stated criteria/indicators – accuracy, and time expenditure. SmartStation combines the best of both. Hence, SmartStation can save an enormous amount of time, speed up work, reduce costs and increase profits Therefore, we recommend decision makers and practitioners to use SmartStation approach for the fact that SmartStation approach has the following advantages – no long traverses needed, less set ups needed, two people are sufficient, takes less time, and provides uniform and higher accuracy.
Event: World Bank Land Conference 2024 - Washington
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