Thank you very much Marc for your explanation. I understood well the concept of Overpass Query.
2015-11-30 15:02 GMT+01:00 Marc Gemis <marc.ge...@gmail.com>: > On Mon, Nov 30, 2015 at 2:47 PM, Yosra Zguira <zguirayo...@gmail.com> > wrote: > > I need to get an osm file which contain nodes, ways and relations of > bicycle > > stations in Lyon, France. I will use this file for simulation using > SUMO, so > > I need to convert it to an .net.xml file. Without relations I can't > convert > > it to .net.xml file. > > > > I saw this question on the help website as well. > The Overpass query only returns the objects that fulfil the criteria > that you specify. When there are no relations with the requested tags, > it will not return relations. Which relations would you expect ? > > With your query you will only receive bicycle rental station, nothing > else, no roads, no houses, nothing but nodes, ways and relations > representing bicycle rental stations. When there are no nodes, ways or > relations with those tags, you will not retrieve nodes or ways or > relations. > In case there are no nodes with those tags, but only ways, you still > retrieve the nodes that are used in the ways, but not other nodes. > > There is no requirement for .osm files to contain relations. In case > your conversion program needs relations, you will have to add > something to the file generated by Overpass. But what ? There are no > relations after all. > > > regards > > m > > _______________________________________________ > Talk-fr mailing list > Talk-fr@openstreetmap.org > https://lists.openstreetmap.org/listinfo/talk-fr >
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