DESCRIPTION
v.clip module enables extracting those features of input
vector map, which overlay features of clip map, as well as their
storing in a new vector map.
In default, boundaries of clip map are dissolved before
clipping. Alternatively, flag -d can be ticked to retain the
boundaries of clip map. Flag -b facilitates clipping by current
computational region.
It is possible to clip vector maps consisting of points, lines,
areas or combinations of these. However, the current version does not
fully support clipping of mixed geometry containing points. In such a
case, the output map will only store clipped lines and/or areas.
NOTES
v.clip is a front-end
to v.overlay, as well
as v.select. Clipping of areas
and/or lines can be achieved
using v.overlay. Clipping of
points can be performed
with v.select.
EXAMPLES
Basic use
Clip railroads by counties Wake and Johnston in North Carolina (North
Carolina data set).
v.extract input=boundary_county where="NAME='WAKE' OR NAME='JOHNSTON'" output=county_WAKE_JOHNSTON
v.clip input=railroads clip=county_WAKE_JOHNSTON output=railroads_WAKE_JOHNSTON
Figure: v.clip example - basic use
Retain boundaries of clip map
v.clip -d input=railroads clip=county_WAKE_JOHNSTON output=railroads_WAKE_JOHNSTON
Clip by current computational region
Clip hospitals by computational region adjusted to counties Wake and
Johnston in North Carolina (North Carolina data set).
It is not obligatory to enter name of clip map. In case it is stated,
the clip map will be omitted.
v.extract input=boundary_county where="NAME='WAKE' OR NAME='JOHNSTON'" output=county_WAKE_JOHNSTON
v.clip -r input=hospitals output=hospitals_clip
Figure: v.clip example - clip by computational region
SEE ALSO
v.overlay,
v.select,
v.dissolve,
v.in.region
AUTHOR
Zofie
Cimburova, GeoForAll
Lab, Czech Technical University in Prague, Czech Republic
Last changed: $Date: 2016-06-28 19:30:00 +0001 (Tue, 28 Jun 2016)$