An this is the polygon resulting from Union. It is valid for JTS: http://www.giovanniallegri.it/share/another_dump2_collect_wkt_resultfromJTS.txt
2010/6/27 G. Allegri <[email protected]>: > also "another_dump2" seems to execute well with JTS. I'm using its wkt > representation as a collected multipolygon: > http://www.giovanniallegri.it/share/another_dump2_collect_wkt.txt > > giovanni > > > > 2010/6/27 strk <[email protected]>: >> 35 points version (2 geoms): >> http://strk.keybit.net/tmp/another_dump2.sql >> >> ... still finds non-noded intersections ... >> >> --strk; >> >> On Sun, Jun 27, 2010 at 12:18:22AM +0200, G. Allegri wrote: >>> I'm getting mad. The same geometries, run in a basic test written by >>> me works fine: http://www.giovanniallegri.it/share/test_wkt.java >>> The same geometries give errors in Postgis (+GEOS?) and with TestRunner... >>> >>> giovanni >>> >>> 2010/6/26 strk <[email protected]>: >>> > On Sat, Jun 26, 2010 at 12:26:11AM +0200, G. Allegri wrote: >>> >> Before going to bed... a snapshot of the location causing the >>> >> exception: >>> >> http://www.giovanniallegri.it/share/error_condition_snapshot.png >>> > >>> > Just in case mine is smaller, another reduction here: >>> > http://strk.keybit.net/tmp/another_dump1.sql >>> > (201 points in 3 geoms) >>> > >>> > NOTE: my version is a database dump, failure happens on st_union >>> > which fails with original geoms and fails with snapped overlay. >>> > dropping any of the 3 geoms makes the operation succeed, haven't >>> > checked if that's a special handling within postgis. >>> > >>> > It'd be worth filing a ticket on trac for better handling. >>> > >>> > --strk; >>> > >>> >> >>> >> >>> >> >>> >> 2010/6/25 G. Allegri <[email protected]>: >>> >> > This is the reduced version of the test xml: >>> >> > http://www.giovanniallegri.it/share/TestUnionMultiPolygon_red.xml >>> >> > >>> >> > Now it contains only two geometries. It tries to node them but fails, >>> >> > so a second try is done with the SnapOverlay, but it fails too. >>> >> > I don't know the algorithm so I'm not able, yet, to say what is >>> >> > failing. >>> >> > >>> >> > giovanni >>> >> > >>> >> > 2010/6/25 G. Allegri <[email protected]>: >>> >> >> Here is a test xml: >>> >> >> http://www.giovanniallegri.it/share/TestUnionMultiPolygon.xml >>> >> >> It's big, but I will reduce it nex time :) >>> >> >> >>> >> >> Notes: >>> >> >> >>> >> >> 1 - this multipolygon comes from an st_collect on 95 rows in a postgis >>> >> >> table. The test on it fails with Topology Expection found non-noded >>> >> >> intersection, because the MP is invalid. I've tested it on jts from >>> >> >> trunk. >>> >> >> 2 - I've run a cascadedunion.union operation on a List of the same >>> >> >> geometries (picked with Geotools directly from the DB). It works fine. >>> >> >> In this test I've used jts 1.10 shipped with Geotools. I will try it >>> >> >> agains the trunk version as soon as possible. >>> >> >> >>> >> >> Giovanni >>> >> >> >>> >> >> 2010/6/25 strk <[email protected]>: >>> >> >>> On Fri, Jun 25, 2010 at 04:39:17PM +0200, strk wrote: >>> >> >>>> Martin, is there any support for testing CascadedUnion >>> >> >>>> with the XML format ? Would help comparing GEOS/JTS. >>> >> >>> >>> >> >>> I've found TestUnaryUnion.xml in JTS repository. >>> >> >>> I guess that's what GEOS should be using >>> >> >>> for testing CascadedPolygonUnion. >>> >> >>> >>> >> >>> Only need to actually port UnaryUnion ... >>> >> >>> >>> >> >>> --strk; >>> >> >>> >>> >> >>> () Free GIS & Flash consultant/developer >>> >> >>> /\ http://strk.keybit.net/services.html >>> >> >>> _______________________________________________ >>> >> >>> geos-devel mailing list >>> >> >>> [email protected] >>> >> >>> http://lists.osgeo.org/mailman/listinfo/geos-devel >>> >> >>> >>> >> >> >>> >> > >>> >> _______________________________________________ >>> >> geos-devel mailing list >>> >> [email protected] >>> >> http://lists.osgeo.org/mailman/listinfo/geos-devel >>> > >>> > -- >>> > >>> > () Free GIS & Flash consultant/developer >>> > /\ http://strk.keybit.net/services.html >>> > _______________________________________________ >>> > geos-devel mailing list >>> > [email protected] >>> > http://lists.osgeo.org/mailman/listinfo/geos-devel >>> > >>> _______________________________________________ >>> geos-devel mailing list >>> [email protected] >>> http://lists.osgeo.org/mailman/listinfo/geos-devel >> >> -- >> >> () Free GIS & Flash consultant/developer >> /\ http://strk.keybit.net/services.html >> _______________________________________________ >> geos-devel mailing list >> [email protected] >> http://lists.osgeo.org/mailman/listinfo/geos-devel >> > _______________________________________________ geos-devel mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/geos-devel
