Abstract
Mangroves are one of the plants that live in coastal areas and have functions and benefits for the surrounding ecosystem. This study aims to examine the accuracy of Landsat 8 OLI's imagery in mapping spatial distribution, analyzing changes in the area, and factors that affect changes in the mangrove forest area in East Aceh District. This study consists of geometric corrections, radians, reflectance, atmosphere, and using the maximum likelihood classification. The results of this study include (1) the level of accuracy of Landsat imagery in mapping the distribution of mangroves in East Aceh Regency was 70.3%, (2) mangroves in East Aceh District experienced a reduction in area of 45099.58 Ha over 22 years, (3) changes are caused by high temperatures of mangrove waters and human activities in utilizing mangroves
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