WEBDec 28, 2021 · Geography. Location. Southeastern Asia, bordering the Andaman Sea and the Gulf of Thailand, southeast of Burma. Geographic coordinates. 15 00 N, 100 00 E. Map references. Southeast Asia. Area. total: 513,120 sq km. land: 510,890 sq km. water: 2,230 sq km. country comparison to the world: 53. Area - comparative.