Remote Sensing Identification and Extraction of Openpit Mining Areas Based on Geemap and MSI/Sentinel-2——A Case Study of Gejiu City,Yunnan Province
The geemap platform was used to identify and locate the openpit tin mining site in Gejiu,Yunnan Province based on MSI/Sentinel2 remote sensing data.Gejiu tin mine is one of the famous historical tin mines in China with abundant mineral resources.However,with the gradual depletion of mineral resources,Gejiu City is in urgent need of economic transformation and ecological environment protection.As ecological restoration focuses on the historical openpit mining area that has suffered from serious ecological environment damage,but the mining area limits are not clearly defined within the land use classification scheme,it is necessary to find a lowcost and highprecision detection method to identify the mining area.This study successfully identified and extracted the Gejiu tin mine openpit mining area through the analysis of MSI/Sentinel2 images by following five main steps:(a)selection of MSI/Sentinel2A images;(b)unsupervised clustering for land use classification;(c)definition of land use categories and extraction of openpit mining areas;(d)validation and correction using high spatial resolution remote sensing images and NASADEM images;and(e)statistical analysis.The results provide important information and data support for the ecological restoration of the region,which helps the city to embrace green economy,seek diversified industrial development to ensure resource protection and achieve the goal of sustainable economic development.
openpit miningGoogle Earth Enginegeemap,cluster classificationland use change
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