polygon buffers?
----- Original Message ----- From: Peter Adler <peter.adler at usu.edu> Date: Sunday, September 2, 2007 8:45 pm Subject: [R-sig-Geo] polygon buffers? To: r-sig-geo at stat.math.ethz.ch
Dear R gurus, I am very excited about all the spatials tools in R because they have almost liberated me from ESRI products. One of the last things I have yet to figure out how to do in R is to create buffers around polygons (or just expand polygons). I searched the R-sig-geo archives (using Google) for "polygon buffer" and "transform polygon" but haven't found anything to get me started. Thanks in advance for your ideas,
I'm a novice when it comes to R but since GDAL and OGR have been interfaced to R, there should/might be possibility to access the GEOS functions through OGR (PostGIS also uses GEOS, which is a C++ port of the Java Topology Suite) if GEOS was linked to OGR when it was built. This page http://www.gdal.org/ogr/classOGRGeometry.html lists the GEOS methods, which include Buffer. Cheers, Ari
Peter -- Peter Adler Department of Wildland Resources 5230 Old Main Hill Utah State University Logan, UT 84322 tel: (435) 797-1021 / email: peter.adler at usu.edu
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