This study aims to determine the level of damage to the protected area of the Mandor Nature Reserve in 2019 by utilizing Remote Sensing and Geographical Information Systems. The method used in this research is secondary data analysis. The data used are the boundaries, area, condition of the Nature Reserve area, and landscape imagery 8. The data collection technique uses secondary data interpretation, while the tools used are Landsat Image 8. The data analysis technique uses the Geographic Information System with ArcGis 10.2.2 software. The results of interpretation of Landsat 8 images recorded on July 5, 2019, and analysis using Arcgis 10.2.2, it is known that from the total forest area of 3.080 ha, the condition of the Nature Reserve is 2,052, 327 ha are still in good condition or have not been damaged, 234,443 ha are lightly damaged, 66,421 ha moderately damaged and 726,809 Ha heavily damaged. Most of the damage to protected areas in the form of Nature Reserve forests was caused by illegal mining activities, namely unauthorized gold mining, forest fires, and forest encroachment or cultivation.
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