[R-sig-Geo] thinning a SpatialPolygonsDataFrame

[Pinaud David]

Hi Michael,
maybe you should try the function dp() in the package shapefiles that is 
an implementation of the Douglas-Peucker polyLine simplification algorithm.
HTH
David

Michael Friendly a écrit :
> The Guerry package contains two maps of france (gfrance, gfrance85) 
> which are quite detailed and large in size (~900K).
> In writing a vignette for the package, there are quite a few figures 
> that use the map multiple times in a layout, and
> consequently result in huge file sizes for the .PDF files created.  
> For these purposes, the map need not be nearly
> so detailed.
>
> I'm wondering if there is a facility to "thin" the map by drawing it 
> at a lower density of lines in the polygon regions.
> When I was working with SAS, there was a GREDUCE procedure that did 
> this nicely.
>
> thanks,
> -Michael
>

-- 
***************************************************
David PINAUD
Ingénieur de Recherche "Analyses spatiales"

Centre d'Etudes Biologiques de Chizé - CNRS UPR1934
79360 Villiers-en-Bois, France 
poste 485
Tel: +33 (0)5.49.09.35.58
Fax: +33 (0)5.49.09.65.26
http://www.cebc.cnrs.fr/

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