[QGIS-trac] Re: [Quantum GIS] #1865: ftools "Union" gives wrong results with non overlapping polygons

Quantum GIS qgis at qgis.org
Tue Aug 11 04:15:54 EDT 2009


#1865: ftools "Union" gives wrong results with non overlapping polygons
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        Reporter:  lutra                                      |         Owner:  cfarmer                                       
            Type:  bug                                        |        Status:  reopened                                      
        Priority:  critical: causes crash or data corruption  |     Milestone:  Version 1.2.0                                 
       Component:  Python plugins and bindings                |       Version:  HEAD                                          
      Resolution:                                             |      Keywords:  geoprocessing, overlay, union, non-overlapping
Platform_version:                                             |      Platform:  All                                           
        Must_fix:  No                                         |   Status_info:  0                                             
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Changes (by lutra):

  * status:  closed => reopened
  * resolution:  fixed =>

Comment:

 Replying to [comment:1 cfarmer]:
 > This has been fixed in r11341. Note: Results should coincide with those
 from ArcGIS and gvSIG.
 >
 > - Carson


 Hi Carson,
 thanks for the effort.

 I gave it a look and it seems to have yet a problem when using Union with
 two layers with identical attribute tables. What seems to do is to
 "delete" the first feature of the first layer used. See attached image.

-- 
Ticket URL: <https://trac.osgeo.org/qgis/ticket/1865#comment:2>
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