Comparison of Digital Terrain Model Elevation Aerial Photography With Terrestrial Measurements in Oil and Gas Exploration Well Areas

Digital Terrain Model Elevation

Abstract

Accurate elevation determination is one of the crucial aspects in oil and gas exploration activities, especially in the planning and management of well areas. This study aims to identify and compare elevations. Digital Terrain Model (DTM) obtained from aerial photographs with terrestrial measurements, and converting the data Digital Surface Model (DSM) to DTM. The urgency of this research is driven by the need for accurate, efficient, and economical mapping methods, as well as validation of the methods used in topographic mapping. Digital Terrain Model (DTM) is a virtual model that adds elements such as fault lines and observations to correct artifacts from the original data, while DSM includes the height of all objects on the ground surface. The results of the study showed that the largest elevation value in the aerial photo DTM was 14.416 meters at point L06 and the smallest elevation value was 6.567 meters at point A46, with an average elevation of 13.716 meters. Meanwhile, the results of the comparison of the elevation of the aerial photo DTM with terrestrial measurements showed the largest difference of 5.513 meters at point A46 and the smallest difference of -2.682 meters at point L21, with an average difference of 0.072 meters. The vertical accuracy level (Z) based on the LE90 value is 0.2076 meters, which meets the geometric accuracy standard of 1:1000 scale class 1 according to BIG Regulation Number 15 of 2014. The results of this comparison are also supported by a 3D model of the DTM elevation of aerial photography. This study provides an important contribution to the validation and improvement of the efficiency of aerial photography-based topographic mapping methods, as well as providing an overview of the accuracy of the data produced.