Pemetaan Distribusi Mangrove Menggunakan Citra Sentinel-2A: Studi Kasus Kota Langsa

Abstract

Mangroves are one of the most productive ecosystems for human life, marine ecosystems, and coastal areas. Mangrove distribution is a distribution based on specific geographical or administrative boundaries. Kota Langsa is one of the areas that has a good representation of the distribution of mangroves. Therefore, researchers studied the Kota Langsa area because Kota Langsa is one of the areas with the largest and most diverse mangrove ecosystem in Aceh Province. This study examines the mapping of mangrove distribution using Sentinel-2A multispectral imagery with composite images of Red, Green, and Blue. This research uses SNAP software. The research stages consist of radiometric correction, atmospheric correction, and multispectral image classification. The method used in image classification is the maximum likelihood algorithm. The use of the maximum likelihood algorithm is because the maximum likelihood algorithm gives the best results among other algorithms. The development of the research is the distribution of mangroves in Langsa City, covering an area of 4727.35 ha, which is divided into three sub-districts and eleven gampong (kelurahan). The sub-districts that have mangrove distribution are East Langsa District covering an area of 3240.25 Ha (68.55%), Langsa Barat District covering an area of 1486.47 Ha (31.45%), and Langsa Lama District covering an area of 0.63 Ha (0.013).

Distribusi Kawasan Mangrove Di Pulau Poto Kabupaten Bintan Melalui Penginderaan Jauh

“…Sementara itu, hasil klasifikasi menggunakan citra Pleiades untuk mangrove seluas 256 ha, vegetasi non mangrove 864 ha, rawa 27 ha, lahan terbuka 313 ha, dan laut 836 ha (Tabel 1). Perbedaan luasan masing-masing kategori penggunaan dan tutupan lahan di pulau Poto dapat disebabkan oleh persamaan nilai pixel antar kategori yang serupa seperti mangrove dan vegetasi non mangrove (Alfiansyah et al, 2023;Rahmadi et al, 2022;Ghorbanian et al, 2021). Sementara perbedaan pada luasan lahan terbuka dan laut dengan penggunaan Sentinel 2A disebabkan pengambilan citra yang dilakukan saat perairan surut sehingga luas pantai berupa gosongan karang tampak menambah luas daratan pulau.…”