#2649: r.to.vect diagonals defect fixed
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Reporter: byronbest | Owner: grass-dev@…
Type: defect | Status: new
Priority: normal | Milestone: 7.0.1
Component: Raster | Version: unspecified
Keywords: r.to.vect | Platform: All
Cpu: x86-64 |
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Comment(by byronbest):
Consider the result of r.drain, which is an already-thinned line of pixel
centres, obviously in "runs" of x,y moving +/- 1 in x and/or y. We'd like
for the runs be "collapsed" into only the corners where the direction
changes. Further, we'd like that running the stream on another grid
respect that we also need the corners where the color or value on the
resulting line changes. The segments will be given the color of the pixel
under the second of every pair.
r.to.vect already handles these runs when they are straight in the x or y,
but not in diagonals where both x and y change.
The attached before/after screen shots show where this has become a
visible defect.
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Ticket URL: <http://trac.osgeo.org/grass/ticket/2649#comment:3>
GRASS GIS <http://grass.osgeo.org>
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