On Mon, Jul 7, 2008 at 2:48 AM, Paulo Cardoso <[EMAIL PROTECTED]> wrote: > Can R perform matrix algebra between ascii converted Esri grids? I'm > convinced that its trivial. > > > > The question is a little more complex (from my point of view and > inexperience): I'm interested in perform cost surface and distance surface > analysis avoiding ArcGIS tools. Maybe R can deal with grid formatted as > matrices... >
Paulo, GRASS would be my first choice for any type of raster operation. See r.cost, r.drain, and r.walk for some examples of cost surface modeling. Here is a worked example: http://casoilresource.lawr.ucdavis.edu/drupal/node/544 Cheers, Dylan _______________________________________________ R-sig-Geo mailing list R-sig-Geo@stat.math.ethz.ch https://stat.ethz.ch/mailman/listinfo/r-sig-geo
