Support site=piste relations
russellporter opened this issue · comments
Although not an officially approved tagging scheme, site=piste is adopted at ~900 ski areas now. Although most ski areas can be easily tagged using landuse=winter_sports, the site=piste scheme has some benefits for more complex cases.
piste:grooming=backcountry runs that are part of a site=piste can be assumed to be part of the ski area and not sidecountry ski routes (currently, they are never members of a ski area, unless tagged with patrolled=yes out of an abundance of caution for safety).
Will need to take care to merge all redundant ski areas together. For example, a single ski area could have all of landuse=winter_sports, site=piste, and Skimap.org ski areas, or even multiple of each. site=piste should be used for the first pass as it's the most fine-grained.