#2550: Polygons disappear after v.generalize simplification
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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 |
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Comment(by mmetz):
Replying to [ticket:2550 dido]:
> 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).
>
I assume the workflow is v.in.ogr + v.clean tool=rmarea + v.generalize
threshold=10.
Several functions relating to v.generalize have just been fixed in trunk
and I would like to test. Can you please provide a link to the shapefile
or send the shapefile to markus.metz.giswork at gmail dot com? Thanks!
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Ticket URL: <http://trac.osgeo.org/grass/ticket/2550#comment:1>
GRASS GIS <http://grass.osgeo.org>
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