119°16′50″
=119°+[16×60+50]÷3600°
=119°+1010÷3600°
≈119°+0.28°
=119.28°
37°39′53″
=37°+[39×60+53]÷3600°
=37°+2293÷3600°
≈37°+0.66°
=37.66°
求助经纬度换算：119°16′50″ 37°39′53″换算成小数点（十进制）的；具体点,分和秒怎么加和的,
119°16′50″
=119°+[16×60+50]÷3600°
=119°+1010÷3600°
≈119°+0.28°
=119.28°
37°39′53″
=37°+[39×60+53]÷3600°
=37°+2293÷3600°
≈37°+0.66°
=37.66°