[R-sig-Geo] Voronoi polygons: New question: Spatial Registration of spatial data layers?

[Edzer J. Pebesma]

Rick Reeves wrote:

>Thanks for everyone's advice and suggestions on this topic;
>Looks like the cells() method of tripack provides me with 
>the information I need to solve my problem. 
>
>Now, if you don't mind, another question. Is it possible to
>spatially register multiple data layers (in the classic GIS
>fashion) so as to identify multiple attributes from all the 
>layers for the same geographic coordinate? The 'point in 
>polygon' problem, with multiple map layers. 
>
>No doubt I could (and would) solve this using GRASS and the
>R interface, but several ecologists here at the Center 
>would like to have an 'R only' solution. 
>  
>
Rick, you may want to have a closer look at the
sp package, which is on its way to CRAN (submitted last night).
I think it does what you want: attributes in data.frames,
each row related to topology (of point, grid cell, line,
or polygon type). You could see a column in the data.frame
part then as a GIS data layer.

An early announcement is found here:

https://stat.ethz.ch/pipermail/r-sig-geo/2005-April/000378.html

and the home page and graph gallery is at
http://r-spatial.sourceforge.net/

Keep us posted on whether it fits your needs.

Bests,
--
Edzer