[GRASS-dev] [GRASS GIS] #2550: Polygons disappear after v.generalize simplification

GRASS GIS trac at osgeo.org
Fri Jan 16 07:23:52 PST 2015

#2550: Polygons disappear after v.generalize simplification
 Reporter:  dido                                            |       Owner:  grass-dev@…              
     Type:  defect                                          |      Status:  new                      
 Priority:  major                                           |   Milestone:  6.4.5                    
Component:  Vector                                          |     Version:  6.4.4                    
 Keywords:  Polygons disappear v.generalize simplification  |    Platform:  MSWindows 7              
      Cpu:  x86-64                                          |  
 Polygons disappear after v.generalize simplification.

 A large rectangular polygon dataset is used with ~14 000 features.
 Polygons are first processed with rmarea to remove all polygons of size
 900 m2. Then a simplification is executed with v.generalize using a factor
 of 10, all other parameters defaulted.

 After simplification several large polygons are missing from the set
 rendering it useless.

 System is a win7x64; QGIS 2.6.1 and GRASS 6.4.4

 Dataset can be provided upon request (being a 7.5mb shapefile).

Ticket URL: <http://trac.osgeo.org/grass/ticket/2550>
GRASS GIS <http://grass.osgeo.org>

More information about the grass-dev mailing list