度、分、秒为60进制.
例如：
32.135°
=32°+0.135°
=32°+0.135*60‘
=32°+8.1’
=32°+8‘+0.1’
=32°+8‘+0.1*60”
=32°+8’+6“
=32°8'6"
30°10'12"
=30°+10'+12"
=30°+10'+12/60'
=30°+10'+0.2'
=30°+10.2'
=30°+10.2/60°
=30°+0.17°
=30.17°