[GRASS-dev] [GRASS GIS] #3260: Implement advanced vector duplicate removal tool

GRASS GIS trac at osgeo.org
Mon Jan 16 02:56:26 PST 2017

#3260: Implement advanced vector duplicate removal tool
 Reporter:  marisn       |      Owner:  grass-dev@…
     Type:  enhancement  |     Status:  new
 Priority:  normal       |  Milestone:  7.4.0
Component:  Vector       |    Version:  unspecified
 Keywords:  v.clean      |        CPU:  Unspecified
 Platform:  Unspecified  |
 At the moment duplicate removal is done by v.clean tool=rmdupl, still it
 has a few limitations. Instead of clobbering up v.clean with extra
 options, a series of new cleaning tools should be started (v.clean.TOOL)
 providing extra options.

 Duplicate cleaning would benefit from following extra functionality:
 * ability to specify threshold (removal of shifted geometries)
 * ability to check if particular attribute matches / does not match

 Use case: I have a point dataset with 4M points. In some areas points have
 duplicates shifted by ~20cm, although in other places less than 20cm
 separate valid points (with different attributes). Ability to apply 30cm
 threshold + check if value matches would allow to eliminate few thousands
 of points.

Ticket URL: <https://trac.osgeo.org/grass/ticket/3260>
GRASS GIS <https://grass.osgeo.org>

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