[QGIS-trac] Re: [Quantum GIS] #2921: Avoid intersection of new polygons.. IS BROKEN

[Quantum GIS]

#2921: Avoid intersection of new polygons.. IS BROKEN
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        Reporter:  pinux                             |         Owner:  mhugent               
            Type:  bug                               |        Status:  reopened              
        Priority:  major: does not work as expected  |     Milestone:  Version 1.7.0         
       Component:  Digitising                        |       Version:  Trunk                 
      Resolution:                                    |      Keywords:  intersection, polygons
Platform_version:                                    |      Platform:  All                   
        Must_fix:  Yes                               |   Status_info:  0                     
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Comment(by mayeulk):

 Hi,

 Unfortunately the bug is still there with r15741 (with 0.000001 as
 snapping option in map units).

 And I got as often as earlier the following message:

 "The feature could not be added because removing the polygon intersections
 would change the geometry type."

 (especially when trying to create a polygon over areas with many polygons
 and where many polygons touch).
 Which I guess might be due to some holes in the polygons: the difference
 create multipart polygons, hence the message (postgis is more flexible
 than the shapefile format here and allows the buggy geometries to be
 created).

-- 
Ticket URL: <http://trac.osgeo.org/qgis/ticket/2921#comment:18>
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