Dear Co-mappers, The new release 0.7.4 of Overpass API has just been deployed on http://overpass-api.de/ The Rambler instance will continue to run version 0.7.3 for some days in case of unexpected flaws in the new version. A lot of minor bugs have been fixed. More important, the query for ways on small bounding boxes is now more efficient. This speeds up http://overpass.apis.dev.openstreetmap.org/ the beta prototype for a popup overlay on the main page.
I've also made two extensions in the syntax: The use of Global Bounding Boxes will be subject of a later mail to talk@ when the newest version of the JOSM plugin mirrored_download has been deployed. Now I talk about the difference operator: It simplifies the kind of searches "every object that has property (or is an) X, but hasn't property (or is an) Y". For example, all nodes that have a value for "maxheight" but aren't part of a street (a way with tag "highway"): http://overpass-turbo.eu/s/Ib // New in Overpass 0.7.4: the difference operator [bbox:50.6,7.0,50.8,7.3]; ( node[maxheight]; // All nodes witha value for "maxheight" - (way[highway];>;); // that aren't part of any kind of street ); out; For the very common case "has tag X, but not tag Y" I suggest to carry on with "[...!~...]". This is more efficient than the difference operator: http://overpass-turbo.eu/s/Ic // New in Overpass 0.7.4: the difference operator // // If the negation only covers that a certain tag is absent, you may prefer // the tag negation operator. This operator is faster than difference. [bbox:50.7,7.0,50.75,7.1]; ( way[highway=residential][name!~'.']; // ways with tag "highway", but without tag "name" >; ); out; All details are given in the wiki: http://wiki.openstreetmap.org/wiki/Overpass_API/versions Cheers, Roland _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk