Peter Adler asked about constructing a `buffer' around a polygon. In the spatstat package the function 'dilate.owin' will compute the morphological dilation (the region of space consisting of all locations that are less than or equal to d units distant from the original polygon). The result is not a polygon; it is represented in spatstat as a binary image.
spatstat will also rescale and translate polygons, etc spatstat does not have code to construct a *polygonal* buffer (a polygon with a margin of *at least* distance d from the original polygon) and I suspect that it's not well defined if the original polygon is not convex. Adrian Baddeley _______________________________________________ R-sig-Geo mailing list R-sig-Geo@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-geo
