Comparison of route survey profile information (longitudinal section) using different percentage UAV data slide-lap and end-lap / Mohamad Shahrir Aizat Saubi

This study investigates the achievable accuracy for route profile (longitudinal section) using UAV data captured at different percentages of side-lap and end-lap. Hence, objectives designed includes; i) to perform UAV data collection at different side lap and end lap (30%,60% and 70%,80%); ii) to extract from orthophoto image the Digital Terrain Model (DTM) for route survey profile information (longitudinal section) and; iii) to compare the route profile information (longitudinal section) between ground survey and orthophoto surface model image. Data was captured using multi-rotor UAV at 50-meter altitudes and ground data collected using total station and GPS instrument. Orthophoto and extraction of DTM was processed in Agisoft Metashape and profile information created in ArcGIS 10.8. The profiles information (in all three dimensions, x, y and z) was compared with ground data. The findings indicated that 70%,80% of side-lap and end-lap gives more accurate results when compared to ground survey data with average accuracy of 0.060meters in z direction and profile data closer to ground survey values. Thus, these findings provide positive potentials of UAV data capture to be implemented in route survey.