STUDY OF SATELLITE DERIVED BATHYMETRY FOR ESTABLISHING BASEPOINT IN DETERMINING THE MARITIME BOUNDARIES (STUDY AREA: COASTAL NIAS)

• Main Author: Fatoni Aziz, Ma'ruf
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/73475
• Institution: Institut Teknologi Bandung

Indonesia is the largest archipelagic state in the world with an ocean area of 6,4 million square kilometers. The determination of maritime boundaries is important so that Indonesia's sea territory can be legally recognized from a legal aspect. Maritime delimitation is carried out by determining the existing base line in the study area, determining the base point at a depth of zero meters at the position of the low water line, then the delimitation of the base line can be done referring to the location of the base point. Along with the development of technology, determining the zero-meter depth point can be done with the Satellite Derived Bathymetry (SDB) method which is considered more efficient in terms of time and cost because there is no need to conduct direct surveys to the field. The purpose of this research is to examine the extent to which SDB can be used as an option in determining the zero-meter depth point for maritime boundary delimitation. SDB depth extraction to obtain zero-meter depth points in this study uses the Lyzenga algorithm with SPOT-6 image data. The results of depth extraction are corrected by tide so that the depth value is referenced to the chart datum. Tidal data processing is carried out by the least squares method and the determination of the coastal slope is needed to reference the zero-meter depth point to the chart datum. The results obtained from this study are points that have the potential to become the base point of depth extraction referenced to Mean Low Water Spring (MLWS) and Lowest Astronomical Tide (LAT). The Root Mean Square Error (RMSE) value of the SDB depth model is 13,53 meters. Based on the accuracy results, the error value is enormous that for now, the use of SDB as an alternative choice for maritime boundary determination cannot be used.