Determination of GPS-Based Land Leveling System Performance in Land Conditions

Authors : Bahattin Akdemir

Pages : 51-64

View : 39 | Download : 21

Publication Date : 2025-04-29

Article Type : Research Paper

Abstract :The purpose of this research was to determine performance of the GPS levelling system which has recently started to be used instead of laser system with levelling shovels widely used in rice farming. Levelling system with GPS, reference station, rotating laser, levelling shovel and tractor were used as material. The width of levelling shovel was 6 m. The GPS levelling system manufactured by a local manufacturer, includes the screen, GNSS Antenna At360 and UHF antenna. The GPS levelling system was operated from a reference station that broadcasted a position correction signal. A Broadcasting device with 2 Wat Lora was used as the reference station. The land tests were carried out with a 128 kW tractor. The laser level detection device was TOPCON RL-H3A to determine the heights according to the levelling plane. Deviations from the reference plane were determined. At the same time, the elevation heights of these points were determined by GPS. The deviation values of the obtained data from the targeted values were calculated and evaluated by taking into account the tolerances. Measurements were also evaluated by calculating the Root Mean Square Error (RMSE) value. Average value of the measurement was determined as 5.71 mm, the standard deviation value was calculated as 3.48 mm and the mean square error was 0.262 mm. The leveling tolerance in the pans for rice production was determined as 2 cm with farmers’ interviews. Most of the measured data were below than 10 mm. As a result of both the measurement data and the evaluation from the graph and field observations; the GPS levelling system has successfully levelled the land within acceptable limits.
Keywords : Hassas tarım, GPS, Çeltik, Tesviye