#1595: v.clean break apparently does not work
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Reporter: pcav | Owner: grass-dev@…
Type: defect | Status: new
Priority: normal | Milestone: 6.4.3
Component: Vector | Version: 6.4.1
Keywords: | Platform: Linux
Cpu: x86-64 |
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Comment(by mmetz):
Replying to [ticket:1595 pcav]:
> v.clean input=patched@paolo type=line tool=snap,break,rmdupl,rmsa
> thresh=1,0,0,0 output=patched_1
>
> The lines are not broken.
The vector 'patched' is the result of patching a 2D vector (region) with a
3D vector (contour). The lines are not broken because there are no
intersections in 3D space, only in 2D space. You need to transform the z
coordinates of either the contour vector or the patched vector to be all
zero with v.transform zscale=0, then the lines are broken.
About the other problem described in the thread in comment [comment:2],
how to snap bad polygons to good polygons, this is now possible with
v.overlay, using the good polygons as ainput and the bad polygons as
binput with operator=or. The snapping threshold may need to be set to some
larger value than default=1e-8.
Markus M
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Ticket URL: <https://trac.osgeo.org/grass/ticket/1595#comment:3>
GRASS GIS <http://grass.osgeo.org>
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