[QGIS-trac] [Quantum GIS] #3518: Spatial Query not selecting points in complex polygons

Quantum GIS qgis at qgis.org
Wed Feb 23 09:03:48 EST 2011


#3518: Spatial Query not selecting points in complex polygons
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   Reporter:  fyford                            |              Owner:               
       Type:  bug                               |             Status:  new          
   Priority:  major: does not work as expected  |          Milestone:  Version 1.7.0
  Component:  Vectors                           |            Version:               
   Keywords:  Spatial Query, selection          |   Platform_version:  1.6          
   Platform:  Windows                           |           Must_fix:  No           
Status_info:  0                                 |  
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 Hi, I've noticed that when I select points within a polygon with a popular
 GIS (debateable) I have a higher hitrate than when doing the same in QGIS.
 After investigating the differences I found that with complex polygons -
 see attached images (The layer used was the UK's Ordinance and Survey's
 Master Map) points were ignored by QGIS and not by the other. I thought
 I'd take the time to let you know.

 Cheers

 Francois

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Ticket URL: <https://trac.osgeo.org/qgis/ticket/3518>
Quantum GIS <http://qgis.org>
Quantum GIS is an Open Source GIS viewer/editor supporting OGR, PostGIS, and GRASS formats


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