[R-sig-Geo] rgeos released on CRAN

[Roger Bivand]

On Mon, 21 Mar 2011, Roger Bivand wrote:

> With some trepidation, rgeos - an interface to Geometry Engine - Open Source 
> (GEOS) for topology operations on sp geometries - is now released on CRAN as 
> a source package. A Windows binary package should follow within a couple of 
> days. If an OSX binary package is offered on CRAN extras, information will be 
> given, otherwise use the Kyngchaos framework and install from source. 
> Contributions of bug reports, code patches, and extensions are welcome, 
> especially via R-Forge. Congratulations to Colin Rundel for a very thorough 
> implementation during GSoC 2010!

The fresh maptools 0.8-* release now on CRAN suggests rgeos. It can use 
rgeos in checkPolygonHoles(), unionSpatialPolygons() and elsewhere, but 
can still use gpclib if the user prefers. The rgeos version of 
checkPolygonHoles() adds a comment to each Polygons object, showing 
whether the member Polygon objects are exterior rings in the OGC "Simple 
Features" sense, and if they are interior rings, which exterior ring 
contains them. This maptools release addresses many of the issues raised 
over recent weeks, but which have been waiting for rgeos to be released.

Roger

>
> Enjoy!
>
> Roger
>
>

-- 
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