a°b‘c“=(a+b/60+c/3600)°例如12°24’36”=12+24/60+36/3600=12+0.4+0.01=12.41°又如12.2436°=12°+0.2436x60’=12°+14.616’=12°14‘+0.616x60”=12°14‘+36.96“=12°20'36.96“