Open snow map project on Fenix 5s plus

Hi community Grinning

I am a new user of Garmin Fenix 5s plus. It is my first watch.

I want to add the opensnowmap (http://www.opensnowmap.org) which contains ski maps in my Garmin watch.

If I understand it is only possible to download the map in « .osm » format (on this page : http://www.opensnowmap.org/iframes/data.html) while the watch asks « .img » file format.

Do you know if is it possible or not to use open snow map on my watch ? If it is possible how to proceed ?

Thanks a lot ! 

Have a good evening Wink


Aurélien (french user, sorry for my english level Upside down)