[R-sig-Geo] polygon buffers?

[rainer at krugs.de]

Just to add to this: QGIS and R under Linux works as well - But as there seem to be slight problems with the grass console under QGRIS, I have the following procedure (QGIS already connected to grass): I start xterm from the grass console in QGIS and in this console R (or emacs...). Works nicely. But it also works directly in the QGIS grass console

Rainer


>On Sun, 2 Sep 2007, Peter Adler wrote:
>
>> Dear R gurus,
>>
>> I am very excited about all the spatials tools in R because they have
>> almost liberated me from ESRI products. One of the last things I have
>> yet to figure out how to do in R is to create buffers around polygons
>> (or just expand polygons). I searched the R-sig-geo archives (using
>> Google) for "polygon buffer" and "transform polygon" but haven't found
>> anything to get me started. Thanks in advance for your ideas,
>
>Vector export and import in the spgrass6 package and v.buffer in GRASS 
>works too. Using QGIS under Windows, it is pretty painless, starting Rgui 
>in the GRASS shell; if the geometries are very complex, it takes some 
>time. readVECT6() on the output geometries does need a fix (in the next 
>release 0.4-2), because the imported data frame only has a single column 
>and the data frame dimension gets dropped. The attached image is from a 
>detailed bit of the North Carolina coast from the data sets supporting the 
>forthcoming third edition of the GRASS book.
>
>Roger
>
>>
>> Peter
>>
>>
>
>-- 
>Roger Bivand
>Economic Geography Section, Department of Economics, Norwegian School of
>Economics and Business Administration, Helleveien 30, N-5045 Bergen,
>Norway. voice: +47 55 95 93 55; fax +47 55 95 95 43
>e-mail: Roger.Bivand at nhh.no
>
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