#1798: all relevant vector modules should have cats and where parameters
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Reporter: mlennert | Owner: grass-dev@…
Type: enhancement | Status: new
Priority: normal | Milestone: 7.0.0
Component: Vector | Version: svn-trunk
Keywords: where cats parameter | Platform: Unspecified
Cpu: Unspecified |
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Comment(by hellik):
Replying to [comment:4 mmetz]:
>
> IIUC, these virtual maps should behave just like normal maps: from a
user perspective, it could look like
> {{{
> r.extract -v (-v as new flag to create a view or virtual vector)
> v.buffer
> }}}
>
> instead of
> {{{
> r.extract
> v.buffer
> }}}
AFAIU a virtual map could be a "permanent" selection by cats/where, store
this virtual map in the mapset and use this virtual map as input for
processing by the v.*-modules.
{{{
v.make.virtual input=vector output=virtualmap cat=1-10 where A < 10
v.* input=virtualmap
}}}
Helmut
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Ticket URL: <http://trac.osgeo.org/grass/ticket/1798#comment:5>
GRASS GIS <http://grass.osgeo.org>
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