On Mon, Aug 20, 2012 at 3:38 AM, Jochen Topf <joc...@remote.org> wrote: > On Sun, Aug 19, 2012 at 09:25:45PM +0200, Lukas Kabrt wrote: >> I have created a small library for parsing OSM data and one of the >> users reported a weird error. The root cause of this error is the fact >> that there are elements with duplicate IDs in the database. I have >> found at least this pair - >> http://www.openstreetmap.org/browse/way/49755010 and >> http://www.openstreetmap.org/browse/node/49755010 >> >> Before I start fixing this error, it would be nice to know whether >> this is an exceptional case or whether these kind of integrity >> violations happens more often. >> >> Has anyone seen other elements with duplicate IDs? What is the best >> way to fix it in the database? > > OSM has three types of objects: nodes, ways, and relations. And they all > have their own number space.
While this seems common knowledge to longtime OSM people, is this documented in the wiki? I looked at the following pages and nothing indicates that nodes, ways, relations, and changesets all have their own ID number space: http://wiki.openstreetmap.org/wiki/Elements http://wiki.openstreetmap.org/wiki/API_v0.6 Is there another page stating this? It's possible that someone relatively new to OSM might commit the same mistake of assuming that all elements of any type have unique IDs. _______________________________________________ dev mailing list dev@openstreetmap.org http://lists.openstreetmap.org/listinfo/dev
