[R-sig-Geo] SpatialPolygonsDataFrame visualization

[Mathieu Basille]

Hello everyone,

I'm not very familiar with visualization of spatial objects in R, 
especially with the possibilities of the spplot function...

I have a SpatialPolygonsDataFrame and I'd like to obtain a map with a 
specific scale for each layer (not in the geographic space, but in the 
data), instead of the same one for every one. In my case, the layers 
represent different variables, not on the same scale (e.g. elevation and 
rain).

Additionally, I'd like to represent NA's with a particular color (say 
black so that we can see immediately where they occur).

I guess these 2 issues are somehow related, but I didn't manage to solve 
them. The help pages of spplot or xyplot didn't really help...

Any hint how to do that?
Thanks in advance,
Mathieu.


 > version
platform       i486-pc-linux-gnu
svn rev        43537
version.string R version 2.6.1 (2007-11-26)
sp: sp_0.9-19


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                                                 ]
  Mathieu BASILLE -- PhD Student                 ]
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  Laboratoire de Biométrie et Biologie Évolutive ]
  Université Claude Bernard Lyon 1 - France      ]
   http://lbbe.univ-lyon1.fr/                    ]
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   http://mathieu.basille.net/pro/               ]
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