Pemetaan Sebaran Rumput Laut di Selat Ceningan, Bali Menggunakan Citra Satelit Sentinel-2

Abstract

The Ceningan Strait is located between the islands of Nusa Lembongan and Nusa Ceningan, Nusa Penida District, Klungkung Regency, Bali. Ceningan Strait is one of the many seaweed cultivation areas in the Nusa Penida District. Seaweed is one of the main commodities produced by the surrounding community. This study aims to map the distribution of seaweed in the Ceningan Strait area using Sentinel-2 Level 2A satellite images with and without water column correction. The classification method used is maximum likelihood by going through two classification stages: classification based on objects in the image, and second, it will reclassify to waters with seaweed class and waters without seaweed class. The results obtained the area of seaweed cultivation in the Ceningan Strait of 29.57 ha without water column correction or 56% of the total area of planting patterns based on Google Earth images and 79.2% when compared with Sentinel-2 Level 2A images throughout 2022 while with water column correction obtained an area of 32.24 ha or an area of 60.3 % of the total planting area based on Google Earth images and 85.1 % when compared with Sentinel-2 Level 2A images throughout 2022. The results show that the water column correction treatment does not significantly affect the mapping of seaweed objects