#3263: r.to.vect: option to filter raster values
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Reporter: martinl | Owner: grass-dev@…
Type: enhancement | Status: new
Priority: normal | Milestone: 7.4.0
Component: Raster | Version: svn-trunk
Keywords: r.to.vect, values | CPU: Unspecified
Platform: Unspecified |
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It would be useful to introduce for G72:r.to.vect `values` option
similarly to G72:d.rast for filtering raster values. Let's say that we
have viewshed map with two categories (1 - visible, 0 - invisible):
{{{
r.category viewA
0
1
}}}
We would like convert to vector map only visible areas. Currently we need
to run G72:r.mapcalc or G72:r.reclass to be able to perform this task:
The attached patch attachment:r-to-vect-values.diff shows quick & dirty
way of implementing `values` option for G72:r.to.vect. This patch takes
code from G72:`d.rast` module (`mask.c`, `mask.h` and `parselist.c`) which
is not acceptable because of code duplication. The duplicated code should
be moved to `libgis` for real implementation.