"foot"=>"yes","horse"=>"no","network"=>"mtb","piste:difficulty"=>"easy","piste:grooming"=>"classic;skating","piste:ref"=>"1b","ref"=>"1","route"=>"bicycle","sac_scale"=>"hiking","service"=>"parking_aisle","ski"=>"yes","smoothness"=>"very_bad","snowmobile"=>"no","surface"=>"gravel","trail_visibility"=>"good","wheelchair"=>"no"