Integration of Satellite Derived Bathymetry and Sounding Data in Providing Continuous and Detailed Bathymetric Information
Nur Syahirah¹, Othman Mohd Yusof¹ and Wiwin Windupranata²
¹ Centre of Studies for Surveying Science and Geomatics, UiTM Shah Alam, Malaysia
² Geodesy and Geomatics Engineering Study Program, Faculty of Earth Science and Technology, Institute Technology of Bandung, Indonesia
Abstract
A hydrographic survey can be a cumbersome sometimes. The data can be sparse, providing it can be costly and it took a lot of manpower and time. Space-borne data like multispectral images can be a helpful tool towards hydrographic survey, especially in the shallow water area. The company like EOMAP and TCARTA make use of satellite-derived bathymetry as a tool and product. Would it be great if it also can be applied in Malaysia especially on the low-risk job or survey planning. Enlarging the survey area and providing a continuous and detailed water depth information is the main objective in this research. In order to complement with convenience and cost reduction, the author used Landsat 8 "(free downloadable images)" in this research. Structuring the procedure is the main part of the process involving pre-processing and processing step until the final product obtained. In this research, the author used various kind of bathymetry algorithms such as Single-Band Algorithm, Green-Band Algorithm, and Stumpf, and the author also uses Principal Component Analysis tool from ArcMap and Spear Relative Water Depth: Log-Ratio Transform tool from ENVI to derived bathymetry. All of this bathymetry algorithm/tool gives out different technique with different statistical approach. The final result then will be compared and evaluated with Single-Beam Echosounder data (ground truth).
Keywords: Hydrography Survey, Shallow Water Area, Satellite-Derived Bathymetry, Bathymetry Mapping
Topic: Coastal and Ocean Dynamics