[R-sig-Geo] Dissolve polygons - unionSpatialPolygons - Error : isTRUE(gpclibPermitStatus()) is not TRUE

[Roger Bivand]

On Tue, 29 Apr 2014, Xochitl.Cormon at ifremer.fr wrote:

> Hi all,
>
> I am trying to merge ICES divisions polygons by subareas i.e. division IVa, 
> IVb and IVc in the shapefile and I want to obtain IV (IVa+IVb+IVc).
>
> To realize that I thought to use the function unionSpatialPolygons(). Is that 
> a good choice?

Yes.

>
> If yes, I tried to apply it and obtained the error 
> "isTRUE(gpclibPermitStatus()) is not TRUE".
>

Please install rgeos which the function will use instead; gpclib should no 
longer be used, but support is retained for backward compatibility.

Hope this clarifies,

Roger

> I therefore try to find more information about the use of this function and 
> download the following example: 
> http://www.nceas.ucsb.edu/scicomp/usecases/PolygonDissolveOperationsR
>
>
> Unfortunately I get the same error and I really don't understand how it coudl 
> be as I am using the example script. Maybe something is wrong with my R 
> configuration?
>
> Thank you very much for your help,
>
> Best,
>
> Xochitl C.
>
> R.Version()
> $platform
> [1] "i386-w64-mingw32"
>
> $arch
> [1] "i386"
>
> $os
> [1] "mingw32"
>
> $system
> [1] "i386, mingw32"
>
> $status
> [1] ""
>
> $major
> [1] "2"
>
> $minor
> [1] "15.3"
>
> $year
> [1] "2013"
>
> $month
> [1] "03"
>
> $day
> [1] "01"
>
> $`svn rev`
> [1] "62090"
>
> $language
> [1] "R"
>
> $version.string
> [1] "R version 2.15.3 (2013-03-01)"
>
> $nickname
> [1] "Security Blanket"
>
> _______________________________________________
> R-sig-Geo mailing list
> R-sig-Geo at r-project.org
> https://stat.ethz.ch/mailman/listinfo/r-sig-geo

-- 
Roger Bivand
Department of Economics, Norwegian School of Economics,
Helleveien 30, N-5045 Bergen, Norway.
voice: +47 55 95 93 55; fax +47 55 95 91 00
e-mail: Roger.Bivand at nhh.no