[R-sig-Geo] Anisotropy for Cokriging

2016-01-08 Thread Seyed Jalil Alavi
Dear All ​ I am mapping forest site productivity for one of most important species in one of the oldest forests in the world, Hyrcanian Forests, Iran. Dear All, I used rose plot function written by Jon Graham (http://www.math.umt.edu/graham/stat544/) and found there is an anisotropy in the var

[R-sig-Geo] Replacement for old overlay() function in package sp

2016-01-08 Thread Rainer M Krug
Hi I have an old script which uses the overlay() function of the package sp. I saw that it was removed in commit 1678, but can I safely replace it with the function over()? It was used as follow: --8<---cut here---start->8--- sp <- readShapePoly(...) grd <- rea

Re: [R-sig-Geo] R Help

2016-01-08 Thread Roger Bivand
On Fri, 8 Jan 2016, chris english wrote: Krishan, Create functions to compute the area, centroid and perimeter of a polygon list (as in the format of georgia.polys). The secret here is the specificity of georgia.polys, which googling leads us to Cran R "GISTools". Looks like this handles the po