Compared Of Coastline Extraction On Sentinel-2A Imagery and Aerial Photos : Case Study in Panggang Island, Kepulauan Seribu, Indonesia

¹ Faculty of Marine and Fisheries Sciences, Raja Ali Haji Maritime University, Tanjungpinang, Indonesia
² Center for Marine and Coastal Environmental Mapping, Geospatial Information Agency, Bogor, Indonesia

^* Corresponding author: estykurniawati@umrah.ac.id

Abstract

Panggang Island is one of the inhabited islands in the Kepulauan Seribu and has a high population density. This high population density has led to widespread infrastructure development on the coast, both seaside settlements and piers as facilities and infrastructure for population mobility, thus affecting the position of the coastline. Coastlines can be determined by remote sensing using several sensors such as aerial photography and satellite imagery as technology used to capture phenomena on the earth's surface. This research aims to see differences in coastlines using two sensors with different spatial resolutions and see their accuracy. Sentinel-2A imagery uses the Modified Normalized Difference Water Index (MNDWI) method and aerial photography images use the Digitation On-Screen method. The research results show that there is a difference in the length of the coastline of 490 meters with a difference in shape that is not too significant. The level of accuracy using the kappa coefficient shows a figure of 0,69. So that in this study it can be concluded that the coastline formed is satisfactory in the process of comparing coastline formation with two different resolutions and is included in the satisfactory category (good).