Yes, apparently the dissolve tool merges adjacent geometries into a single "part" when operating on polygons, but not when operating on lines.
2017-02-22 11:46 GMT+01:00 Marco Grisolia <[email protected]>: > Hmm maybe I'm wrong, but I think it will only return singleparts without > taking care of an adjacency criterion (even if ran after the dissolving > operation). > Marco > > 2017-02-22 11:37 GMT+01:00 Anita Graser <[email protected]>: >> >> You can run multiplart to singlepart afterwards. >> >> >> On Wed, Feb 22, 2017 at 11:18 AM, roy roy <[email protected]> wrote: >>> >>> Hi Anita, that does not do what Marco is asking for, because you get a >>> multipart geometry; >>> >>> he needs a linestring geometry I think... >>> >>> >>> Il 22/02/2017 11:10, Anita Graser ha scritto: >>> >>> Hi Marco, >>> >>> The Dissolve tool already has a "unique fields" option. It sounds like >>> you are reinventing that. >>> >>> Best wishes, >>> Anita >>> >>> >>> >>> On Wed, Feb 22, 2017 at 10:32 AM, Marco Grisolia >>> <[email protected]> wrote: >>>> >>>> Hi, >>>> I recently answered to a question on GIS StackExchange [0]. In this >>>> question, the asker was looking for a way for dissolving features using an >>>> adjacency criterion instead of using common attribute field (please, follow >>>> the link below for a better understanding). This feature is already >>>> available in the analogous ArcGIS tool when the"Create multipart features" >>>> option is enabled and I think it could be of interest having an additional >>>> option like this in the "Dissolve" tool main dialog for next releases. >>>> I never submitted a feature request on the QGIS Project site but, since >>>> there is already a (very rough) code and a general idea on how to approach >>>> the issue, I didn't know if this was the case of adding it there. >>>> Otherwise, >>>> let me know if I need to add it on the QGIS Project site (if this is the >>>> case, I'm sorry for wasting your time). >>>> Regards, >>>> Marco >>>> >>>> >>>> [0] >>>> http://gis.stackexchange.com/questions/228267/merging-adjacent-lines-in-qgis >>>> >>>> _______________________________________________ >>>> Qgis-developer mailing list >>>> [email protected] >>>> List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer >>>> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer >>> >>> >>> >>> >>> _______________________________________________ >>> Qgis-developer mailing list >>> [email protected] >>> List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer >>> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer >>> >>> >>> >>> _______________________________________________ >>> Qgis-developer mailing list >>> [email protected] >>> List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer >>> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer >> >> >> >> _______________________________________________ >> Qgis-developer mailing list >> [email protected] >> List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer >> Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer > > > > _______________________________________________ > Qgis-developer mailing list > [email protected] > List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer _______________________________________________ Qgis-developer mailing list [email protected] List info: https://lists.osgeo.org/mailman/listinfo/qgis-developer Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-developer
