Dear Stefan, The Openstreetmap Relation -> Multipolygon rules are very complex and cannot be simply done by a union method. You can either follow their implementation rules or use one of the existing parsers (like osm2pqsql) to generate polygons.
Jan Am 12.07.2013 um 23:41 schrieb Stefan Steiniger <[email protected]>: > Hi Martin et al, > > I am wanting to create (multi-)polygons from *.osm data. Problem is that > several "ways" (read: LineStrings) can make up a polygons outershell. > > see here: http://wiki.openstreetmap.org/wiki/Relation:multipolygon > (in particular the image on the right side) > > Now, after reading the JTS doc I am still unsure if geometry.union() - > looped over all (outer)ways does what I want. That is, if should use > LineMerger instead? > > Any advise? > > cheers from the southern hemisphere, > stefan > > ------------------------------------------------------------------------------ > See everything from the browser to the database with AppDynamics > Get end-to-end visibility with application monitoring from AppDynamics > Isolate bottlenecks and diagnose root cause in seconds. > Start your free trial of AppDynamics Pro today! > http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk > _______________________________________________ > Jts-topo-suite-user mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/jts-topo-suite-user > ------------------------------------------------------------------------------ See everything from the browser to the database with AppDynamics Get end-to-end visibility with application monitoring from AppDynamics Isolate bottlenecks and diagnose root cause in seconds. Start your free trial of AppDynamics Pro today! http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk _______________________________________________ Jts-topo-suite-user mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/jts-topo-suite-user
