On Sun, 21 Feb 2010, Markus Loecher wrote:
Dear all,
I apologize if this is too simple a question as it does appear to be a basic
GIS operation but I have not found the appropriate function that performs a
clipping of polygons into boundaries given by a (larger "outer") polygon. I
tried overlay() from package sp and clipPolys from package PBSmapping but
none converted the "inner" polygons into new ones laying inside the
boundaries given by the outer polygon.
Maybe a basic GIS operation should be done in a GIS? Otherwise, please
feel free to consult threads on the license problems of gpclib, and about
the R-forge rgeos package. If you'd like to contribute such an
intersection (I think you want the intersection between an arbitrary
SpatialPolygons object and a simple SpatialPolygons object for the outer
polygon) function tool to rgeos, or at least a sketch of how it might
work, that would be helpful.
Roger
Any help would be greatly appreciated,
Thanks,
Markus
[[alternative HTML version deleted]]
_______________________________________________
R-sig-Geo mailing list
R-sig-Geo@stat.math.ethz.ch
https://stat.ethz.ch/mailman/listinfo/r-sig-geo
--
Roger Bivand
Economic Geography Section, Department of Economics, Norwegian School of
Economics and Business Administration, Helleveien 30, N-5045 Bergen,
Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43
e-mail: roger.biv...@nhh.no
_______________________________________________
R-sig-Geo mailing list
R-sig-Geo@stat.math.ethz.ch
https://stat.ethz.ch/mailman/listinfo/r-sig-geo
