Add support for climbing areas and OSM relations

[xyz32]

Usually climbing crags are part of a climbing area.

overpass turbo:

[out:json][timeout:60];
area[type=boundary]["ISO3166-1"="CA"]->.searchArea;
(
  node["sport"~"^climbing$|^climbing[:space:;]|[:space:;]climbing[:space:;]|[:space:;]climbing$"](area.searchArea);
  way["sport"~"^climbing$|^climbing[:space:;]|[:space:;]climbing[:space:;]|[:space:;]climbing$"](area.searchArea);
  >;
);

out body meta;
rel(bn);
out body meta;
rel(br);
out body meta;

[olbotta]

i agree, since from what i can understand from the wiki if you map all the routes they should be grouped into a relation, and in this case there would be no specific POI to represent the climbing crag. currently climb the world only recognises points and not relations.

[xyz32]

That may have been me who put that info into the wiki. At this time I am still trying to get more familiar with OSM relations to see how good of a fit for this they are. The only concern I am having right now is the climbing areas, which would result in being mapped as a relation containing all the crag relations. A bit abstract to my liking, but maybe I should start implementing it, and it may work.