Hi Tom, In addition to the (very useful) earlier posts, I would like to point out SAGA GIS. It is a very good GIS software (and freeware / open source), especially for grid analyses. It has a command line version, which together with the ability of R to invoke system commands using either 'Shell' or 'system' makes it fairly easy to do the typical GIS work in SAGA, and carry out other analyses in R, all from within R. With the recent release of the RSAGA package for R this has become considerably easier.
The documentation for SAGA is somewhat poor, but there are two very useful user guides available. See the SAGA website (http://www.saga-gis.uni-goettingen.de/html/index.php) for links. See CRAN for the RSAGA package. Paulo _______________________________________________ R-sig-Geo mailing list R-sig-Geo@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-geo
