[GRASS-dev] [GRASS GIS] #2964: G7: v.extract does not remove islands

[GRASS GIS]

#2964: G7: v.extract does not remove islands
-------------------------------+-------------------------
 Reporter:  sbl                |      Owner:  grass-dev@…
     Type:  defect             |     Status:  new
 Priority:  normal             |  Milestone:  7.0.4
Component:  Vector             |    Version:  7.0.3
 Keywords:  v.extract,islands  |        CPU:  Unspecified
 Platform:  All                |
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 v.extract in GRASS 7.0.3 (and trunk too I guess) does not remove islands
 from areas.

 This problem has been reported on the mailinglist earlier (for earlier
 versions): [[BR]]

 https://lists.osgeo.org/pipermail/grass-user/2014-June/070503.html [[BR]]

 https://lists.osgeo.org/pipermail/grass-user/2008-May/044906.html [[BR]]

 https://lists.osgeo.org/pipermail/grass-user/2006-May/034301.html [[BR]]

 https://lists.osgeo.org/pipermail/grass-dev/2004-May/014602.html [[BR]]


 A test using the North Carolina data set illustrates it. Both the
 following v.extract commands are - according to the manual - supposed to
 remove islands. However, islands are still present in the results:

 {{{
 # Create a vector map with islands
 v.extract input=soils_general at PERMANENT cats=222 output=map_with_islands

 # From the Manual
 v.extract input=map_with_islands output=maps_without_islands cats=1-99999
 # and/or
 v.extract -d in=map_with_islands out=maps_without_islands
 }}}

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Ticket URL: <https://trac.osgeo.org/grass/ticket/2964>
GRASS GIS <https://grass.osgeo.org>