Dung BQ, Khanh UD. CALCULATION OF VIETNAM’S COASTLINE LENGTH (MAINLAND) BASED ON TOPOGRAPHIC MAP SYSTEM AT SCALE 1/50,000. VJMST [Internet]. 2016 Aug. 31 [cited 2025 Apr. 15];16(3):221-7. Available from: https://vjs.ac.vn/index.php/jmst/article/view/8654