[GRASS-dev] [GRASS GIS] #232: raster and vector mismatch in monitors

[GRASS GIS]

#232: raster and vector mismatch in monitors
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 Reporter:  hcho              |       Owner:  grass-dev at lists.osgeo.org
     Type:  defect            |      Status:  new                      
 Priority:  major             |   Milestone:  7.0.0                    
Component:  default           |     Version:  svn-trunk                
 Keywords:  display, monitor  |    Platform:  Linux                    
      Cpu:  x86-32            |  
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 I used r.to.vect to convert a raster map to vector and displayed both of
 them on a monitor. When the monitor is in the default size, I can see
 slight mismatch along the boundaries of the two maps. For example,

 d.mon[[BR]]
 g.region rast=tmp[[BR]]
 d.erase[[BR]]
 r.to.vect input=tmp output=tmp feature=area[[BR]]
 d.rast tmp[[BR]]
 d.vect tmp type=boundary

 If I zoom in a lot or make the monitor larger, I don't see this effect. My
 guess is that conversion between raster and vector was OK, but scaling
 coordinates (R_scaled_raster or something?) before actually displaying
 them might cause this problem. In effect, PNG maps exported from the
 monitor looks so ugly.

 I'm attaching two figures (small and large monitors).

 Any idea?

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Ticket URL: <http://trac.osgeo.org/grass/ticket/232>
GRASS GIS <http://grass.osgeo.org>