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Akurasi geometri garis pantai hasil transformasi indeks air pada berbagai penutup lahan [Paper]

Abstrak Garis pantai merupakan salah satu data dasar dalam pemetaan yang harus dijamin ketersediaannya. Pesisir di Indonesia memiliki ...



Abstrak

Garis pantai merupakan salah satu data dasar dalam pemetaan yang harus dijamin ketersediaannya. Pesisir di Indonesia memiliki variasi penutup lahan sehingga karakteristik indeks air dalam memperoleh data garis pantai perlu diketahui agar pemanfaatan indeks air menjadi efektif. Tujuan penelitian ini adalah menghitung akurasi geometri garis pantai menggunakan transformasi NDWI, MNDWI, dan AWEI pada penutup lahan berbeda. Garis pantai hasil indeks air diperoleh dari citra Landsat 8 OLI, sedangkan garis pantai referensi untuk uji akurasi diperoleh dari interpretasi visual citra PlanetScope. Standar penilaian ketelitian horizontal garis pantai hasil indeks air menggunakan Perka BIG No 15 Tahun 2014. Hasil penelitian adalah pada nilai akurasi geometri garis pantai skala 1:100.000, tidak ada satu pun indeks air yang mampu mengakomodasi perolehan garis pantai pada semua kelas penutup lahan. Variasi nilai akurasi geometri setiap indeks air disebabkan oleh variasi kondisi citra, karakteristik saluran yang digunakan dalam formula indeks air, dan piksel campuran.

Kata kunci: akurasi geometri; garis pantai; indeks air; penutup lahan; Landsat 8 OLI


Abstract

Shoreline is one of the basic data in mapping that must be guaranteed. Coastal area in Indonesia has a variety of land cover so the characteristics of the water index in obtaining shoreline data need to be understand in order to use the water index method effectively. The objective of this study is to assess the geometric accuracy of shoreline derived by water indices (NDWI, MNDWI, and AWEI transformations) on various land cover. Shoreline data is extracted from Landsat 8 OLI imagery, while the reference shoreline for accuracy assessment is obtained from visual interpretation of PlanetScope imagery. The horizontal accuracy standard of the shoreline derived by water index uses Perka BIG No. 15 in 2014. The result show that there is no single water index that can accommodate shoreline extraction on 1:100.000 scale shoreline map in all land cover classes. Variations in geometric accuracy values on each water index are caused by image condition variations, band characteristics used in the water index formula, and mixed pixels.

Keywords: geometric accuracy; shoreline; water indices; land cover; Landsat 8 OLI


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RSGIS INDONESIA: Akurasi geometri garis pantai hasil transformasi indeks air pada berbagai penutup lahan [Paper]
Akurasi geometri garis pantai hasil transformasi indeks air pada berbagai penutup lahan [Paper]
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RSGIS INDONESIA
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