> This is probably something that the OSM editors should warn users about when they try to create such a relation. JOSM doesn't allow to create recursive relations, but it accepts them when they are present in the data.
-- Karl -----Ursprüngliche Nachricht----- Von: dev-boun...@openstreetmap.org [mailto:dev-boun...@openstreetmap.org] Im Auftrag von Andrew M. Bishop Gesendet: Sonntag, 13. September 2009 11:56 An: dev@openstreetmap.org Betreff: [OSM-dev] Recursive relations In OSM a relation can contain other relations but it seems that there is nothing to check that a relation doesn't contain itself. I can't think of any legitimate reason that it should be allowed though. For example relation 15852 has contained itself since version 108 which was created at the beginning of July (changeset 1754423). Within the UK alone the following route relations all contain themselves: 12179 15852 80545 101440 163368 165638 165638 167468 168189 170290 170290 Also within the UK there is one boundary relation that contains itself: 57535 Obviously it is possible to ignore these when parsing the data (which is what I do and what alerted me to them in the first place) but it would be better if it didn't happen. This is probably something that the OSM editors should warn users about when they try to create such a relation. Is there somebody that can find and fix all such relations on the server (if they have no legitimate use)? Obviously self-recursion is easy to find; there might be mutually recursive relations as well but I haven't looked for them. -- Andrew. ---------------------------------------------------------------------- Andrew M. Bishop a...@gedanken.demon.co.uk UK OpenStreetMap Route Relations: http://www.gedanken.org.uk/mapping/osm-routes/route.html UK OpenStreetMap Boundary Relations: http://www.gedanken.org.uk/mapping/osm-boundaries/boundary.html _______________________________________________ dev mailing list dev@openstreetmap.org http://lists.openstreetmap.org/listinfo/dev _______________________________________________ dev mailing list dev@openstreetmap.org http://lists.openstreetmap.org/listinfo/dev
