Utilization of SPOT 6 Image Remote Sensing for Mapping Coral Reef and Seagrass

Abstract With one of the world’s longest coastlines, Indonesia has vast marine resources like coral reefs and seagrass that are crucial for biodiversity, coastal protection, and marine tourism. However, these ecosystems are deteriorating due to sedimentation, pollution, and human activities, necessitating accurate remote sensing mapping for sustainable management. This research focuses on mapping coral reefs and seagrass cover in Simeulue Regency, Aceh, to support effective and sustainable resource management and local community welfare using SPOT 6 satellite imagery and field surveys. This study is a quantitative descriptive research aimed at mapping coral reef and seagrass cover in Simeulue Regency using SPOT 6 multispectral satellite imagery. The image data obtained are processed, including geometric and radiometric corrections, and validated through field surveys using the transect method to compare mapping results with actual field conditions. The data analysis process includes object-based image classification, accuracy testing using a confusion matrix, and reinterpretation of the map. The research results show that Simeulue Regency, located in the Indian Ocean, comprises approximately 57 islands and is known for its rich marine biodiversity, particularly coral reefs and seagrass ecosystems, which cover an area of around 26,120.31 hectares. Despite being vital for marine life and local communities, these ecosystems face threats from climate change, human activities, and natural disturbances, leading to a decline in coral cover, with only about 6% of Indonesia's coral reefs in good condition. Effective monitoring, restoration, and conservation efforts are crucial for maintaining these ecosystems and supporting the livelihoods of communities dependent on them.