PEMETAAN BATIMETRI PERAIRAN DANGKAL DENGAN PENERAPAN METODE STUMP MENGGUNAKAN CITRA SENTINEL 2B DI PERAIRAN PULAU TIKUS, BENGKULU

The increasing demand for detailed bathymetric information ultimately has enhanced
hydrographic surveying industry to diversify data collection techniques.In this case, Tikus
Island is the object for this research. One of the important information needed is
bathymetry to management this island. The aim of this research was to study, analize, and
estimate the accuracy of bathymetry by using stump method and display this information to
be bathymetry map. The research area in this paper was Tikus Island, Bengkulu. Field
data was carried out during 28th – 30th June 2019. Data Processing held on January to
February 2020. There were four steps following this paper. There were tidal analysis using
admiralty, pre-processing imagery data, depth estimation using stump method, and
accuracy test. Tidal data was taken from secondary data of Geospatial Information Agency
on June 2019. The result showed the value of MSL was 0,000418 meter, LLWL was -
0,756538 meter, HHWL was 0,76 meter, and Z0 was -0,539143 meter. Pre-processing was
consist of atmospheric correction, layer stacking, masking, and cropping. Depth estimation
used 52 observation point in algoritm of Stump. The result of estimate depth using
algorithm of Stump showed that the depth value of Tikus Island was 0,858– 1,290 meters.
The accuracy test result showed that R2
value was 0,779. It showed that he Stump method
can be used to estimate depth well.
Keywords : Bathymetry, Stump Method, Tikus Island