Jessica, I don't know the exact details, either I wasn't there or it is too long ago.
If you have a polygon that encloses your study region, look into using method ovelay to find out which grid points of the full (rectangular) grid fall inside your polygon. for the sig/wiki: is this a FAQ as well? -- Edzer jessica243 wrote: > Dear Edzer, > I am sorry to writing again,last time I ask you how to make"meuse" data > generates "meuse.grid" data? you told me use "SpatialPixels( > Spatialpoints(makegrid(meuse)))".I found using this method, the results do > not the same as meuse.grid. could you tell me the details? > Sincerely > Jessica > -- Edzer Pebesma Institute for Geoinformatics (ifgi), University of Münster Weseler Straße 253, 48151 Münster, Germany. Phone: +49 251 8333081, Fax: +49 251 8339763 http://ifgi.uni-muenster.de/ http://www.springer.com/978-0-387-78170-9 [email protected] _______________________________________________ R-sig-Geo mailing list [email protected] https://stat.ethz.ch/mailman/listinfo/r-sig-geo
