Baais maps are the Garmin maps. As far as I know, for the whole world. However, from my point of view, these are not very useful for MTB. Especially if you want to find possible routes on the road. You can also buy topo Switzerland maps for Garmin (very expensive). But there are some websites online that use OpenStreetMap and other open source maps and make them compatible with garmin. I use maps from openmtbmap.org. There are also contour lines. What I missed the last time I used the Garmin maps.

Hope this helps