David MENTRE wrote: > Is this the right way to do it? Can we assume that, when nominatim > returns an entry with class="boundary" type="administrative" and > osm_type="relation", then we can safely query the planet_osm_line > table with the _opposite_ of osm_id?
A _way_ will be in the tables with a positive osm_id, where a _relation_ will always have a negative osm_id. This is due to non-unique numbering between OSM object classes. Nominatim tells you* whether you got back a relation or a way, and you can then search for the negative or positive osm_id in planet_osm_polygon, for relations or closed ways, respectively. * At least, it does so in http://nominatim.openstreetmap.org/details.php?place_id=49949948 but I don't know what the bare API result looks like. -- Lennard _______________________________________________ dev mailing list dev@openstreetmap.org http://lists.openstreetmap.org/listinfo/dev
