[QGIS-trac] Re: [Quantum GIS] #3132: Field calculator cannot calculates area of polygon

Quantum GIS qgis at qgis.org
Mon Mar 14 04:37:31 EDT 2011


#3132: Field calculator cannot calculates area of polygon
-----------------------------------------------------+----------------------
        Reporter:  dr                                |         Owner:  jef          
            Type:  bug                               |        Status:  reopened     
        Priority:  major: does not work as expected  |     Milestone:  Version 1.7.0
       Component:  Vectors                           |       Version:  Trunk        
      Resolution:                                    |      Keywords:               
Platform_version:                                    |      Platform:  Windows      
        Must_fix:  Yes                               |   Status_info:  0            
-----------------------------------------------------+----------------------

Comment(by borysiasty):

 I can confirm. Creating integer as well as floating point fails. Right
 after calculating you can see proper values (as they're not updated from
 layer), but after layer save they becomes negative.

 However, updating the existing AREA field works fine.

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Ticket URL: <http://trac.osgeo.org/qgis/ticket/3132#comment:11>
Quantum GIS <http://qgis.org>
Quantum GIS is an Open Source GIS viewer/editor supporting OGR, PostGIS, and GRASS formats


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