Appraisal of Land use Survey using Total Station and Handheld GPS

Abstract

A handheld GPS (Global Positioning System) is a device that uses to conduct a survey with less manpower and less time. Mostly total station is used in land use survey with higher accuracy. Hence this study is going to verify the capability of the handheld GPS to replace instead of the Total Station in land use survey. The aim of the study was to evaluate the land use survey results with handheld GPS and total station. GPS (Leica GS 15) instrument was fixed at a Base station named NSG 01 and data collection was done using handheld GPS (Leica Zeno 20) instrument with different modes such as Satellite-Based Augmentation System (SBAS) off and SBAS on. Further the collected data were processed with the Differential GPS (DGPS) and without DGPS approaches using Leica infinity and QGIS software and four plans were prepared. Then the area was calculated for each land use category. Results were compared using the error percentages each land use. Further it was compared using correlation analysis. Finally, the most accurate results were given by the handheld GPS in SBAS on mode. Its error level was 0.46% and it is very low compare with other modes. SBAS on mode Correlation Coefficient was 0.99995 and it was the closest value to 1. So, the SBAS on mode is the best method to improve the accuracy of land use surveys where there is scarcity of manpower and time instead of total station.