[R-sig-Geo] How to convert esri shapefiles to ppp objetcs/ owin object
Roger.Bivand at nhh.no
Tue Sep 12 10:45:47 CEST 2006
On Mon, 11 Sep 2006, Debarchana Ghosh wrote:
> Hi All,
> I'm in the process of conducting spatial point clustering where the
> locations are very important by using splancs and spatstat packages. However
> it looks like I'm stuck at the very first step. Even after reading the
> manuals, I can't figure it out how to create the ppp class object from the
> esri shapefiles specially the uneven polygon. I have a study area of seven
> counties. Any help on this will greatly appreciated.
Please have a look at the functions in the spspatstat package on
sourceforge - http://r-spatial.sourceforge.net/ and see download for
download instructions. If the sp package is installed first:
rSpatial <- "http://r-spatial.sourceforge.net/R"
should work (unless OSX when type="source" is also needed). That lets you
convert points and windows from sp class objects. See the R News note on
sp classes in 2005/2, pp. 9-13.
If you can see additions to the interface package that would be useful,
please let us know.
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.Bivand at nhh.no
More information about the R-sig-Geo