[GRASS-dev] [GRASS GIS] #1418: v.dissolve not working

[GRASS GIS]

#1418: v.dissolve not working
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 Reporter:  hellik  |       Owner:  grass-dev@…              
     Type:  defect  |      Status:  new                      
 Priority:  major   |   Milestone:  7.0.0                    
Component:  Vector  |     Version:  svn-trunk                
 Keywords:          |    Platform:  All                      
      Cpu:  All     |  
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Comment(by martinl):

 Replying to [comment:3 neteler]:
 > v.dissolve also silently fails on Linux as no effect is taken on the
 resulting map (also, one less area than in GRASS 6.4.svn):

 when you don't defined 'column' option, features are dissolved based on
 category. I have added warning about that in r59375.

 > North Carolina dataset:
 {{{
 > GRASS 6.4.2svn (nc_spm_08):~ > v.dissolve zipcodes_wake out=zip_name
 > Number of areas: 27
 > Number of isles: 2
 }}}
 >
 > -> 48 areas reduced to 27 areas, look ok but:

 this is probably typo I am getting 47 areas also in G6, you probably
 missed `column=ZIPNAME`. It seems to me that there is no difference in
 results produced in G6 or G7.

 G6 & G7:

 {{{
 v.dissolve in=zipcodes_wake out=zip_names --o -> 47
 v.dissolve in=zipcodes_wake out=zip_names --o column=ZIPNAME -> 27
 }}}

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Ticket URL: <http://trac.osgeo.org/grass/ticket/1418#comment:6>
GRASS GIS <http://grass.osgeo.org>