[talk-ch] Sledging (faire de la luge / andare in slitta) and other challenges

The winter snow will hopefully soon return closer to the urban areas, so I've quickly made a map about sledging: http://umap.osm.ch/en/map/sledging-in-switzerland_1105 (wait a bit until the overpass data gets loaded...).

I used the tag piste:type=sled and when looking at the map I see that western Switzerland seems to have no such pistes! Am I missing something? :-)

:Stefan

P.S. Speaking of this nice area Romandie there are two challenges "Missing Crosswalks of Vaud" and "Missing Crosswalks of Geneve" waiting to be solved (highway=crossing): http://maproulette.org/