https://m.chuing.net/zboard/zboard.php?id=mvs&page=2&sn1=1&m_id=&divpage=20&best=&select_arrange=headnum&desc=asc&no=103565&c 이거 충족되는지 의견좀
직사각형섬일시 = 17.627km × 17.627km × 0.84m
원통형섬일시 = 약 반경 10km