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Indonesia has the largest tropical peatlands in the world covered an area of 14.91 \nmillion ha. Peatlands play an important role in global carbon sequestration. This study aimed \nto: a] map the peatland in Pesisir Selatan, Sumatra Barat calculate the soil carbon stock in the \npeatlands on various land use and peat thickness and c] identify the relationship of soil \ncharacteristics to the soil carbon. We investigated thirty soil samples in Pesisir Selatan. The \nland-use types on peatland in Pesisir Selatan consisted of forest [GH], shrub [GS], oil palm \nplantations [GPs], annual cropland[GLp], and bareland [GLp]. The results showed that the \ntotal area of peatlands inPesisir Selatan is 78,998.74 ha, while the total amount of soil carbon \nstocks is 244 million tonnes, and the sequence follows GPs> GS> GH> GT>GLp. The average \nvalue of soil carbon stock is 3,090.89 per ha, the sequence follows GH> GS> GT> GPs>GLp. \nHence, the average amount of soil carbon stock based on depth is 8,529 tons for peat depth \n>600cm, 4,082 tons for peat depth 300-600 cm, and 525 tons for peat depth 0-300 cm. \nDifferences in average values of soil carbon stock per ha are highly influenced by the \ndifferences in peat thickness. The dynamics of total carbon show a higher its content in the \nsubsurface layer rather than in the surface layer. The soil carbon is linearly correlated with \nwater content and it is inversely proportional to bulk density. \nKeywords: digital mapping, peat, satellite imagery, soil carbon stock