VNU Journal of Science Earth and Environmental Sciences, Vol 36, No 3 (2020) 102 115 102 Original Article Possibility for Identifying/Extracting Rock Outcrop Using Landsat 8 OLI/TIRS Case Study of Thua Thien Hue Province Nguyen Quang Tuan, Do Thi Viet Huong, Doan Ngoc Nguyen Phong, Nguyen Dinh Van University of Sciences, Hue University, 77 Nguyen Hue Street, Hue city, Vietnam Received 07 August 2020 Revised 20 August 2020; Accepted 26 August 2020 Abstract This paper approaches the ratio image m[.]