[R-sig-Geo] Spatial analysis - matrix algebra

[Hisaji ONO]

Hi.

 R seems to be able to deal with your desired processes.

 However, your had better use GRASS GIS or SAGA both of
which support map algebra or cartographic modelling,
import ascii grid and has interface packages(spgrass or
RSAGA) to R for more complicated analyses if required.


 Regards.

--- Paulo Cardoso <pecardoso at netcabo.pt> 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...
> 
>  
> 
> Maybe R could call FWtools to perform all
> calculations iteratively...
> 
>  
> 
> Paulo
> 
>  
> 
> 
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> 
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