[Help] How to convert UTM to GPS, all (x,y) mission data information ?

[Ergo]

Hello guys,

 

Since several days i tried to convert UTM data to GPS data :

 

In miz file, i extract mission and for each (x,y) coordinate i want to have the gps (lat,long).

 

I have fond this : http://www.uwgb.edu/dutchs/UsefulData/UTMFormulas.htm

 

Any people have an example of worked code to convert UTM to GPS which it works whith DCS systems ?

 

For exemple (310903.8 , 4970694.3) => (42°9'56" , 42°42'39"). (I have used Mission Editor).

 

Thanks !

Ergo.