rgeos released on CRAN
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