Adrian Torchiana <adrian.torchiana <at> gmail.com> writes:
>
> Hi,
>
> This is my first post to R-help. I'm having trouble getting rgeos to work.
R-help is arguably too general to help, please ask questions of this kind on
R-sig-geo.
>
> Info on the server and packages I'm using:
>
...
> $ *rpm -qa | grep geos*
> geos-devel-3.4.2-1.rhel6.x86_64
> geos-3.4.2-1.rhel6.x86_64
>
How did you install rgeos (from source)? Are other versions of GEOS present
not installed as RPMs?
...
> $ *R -q*
> > *library(rgeos)*
> rgeos version: 0.3-8, (SVN revision 460)
> GEOS runtime version: 3.4.2-CAPI-1.8.2 r3921
> Polygon checking: TRUE
>
> > *example(gDistance)*
>
> gDstnc> pt1 = readWKT("POINT(0.5 0.5)")
>
> gDstnc> pt2 = readWKT("POINT(2 2)")
>
> gDstnc> p1 = readWKT("POLYGON((0 0,1 0,1 1,0 1,0 0))")
>
> gDstnc> p2 = readWKT("POLYGON((2 0,3 1,4 0,2 0))")
>
> gDstnc> gDistance(pt1,pt2)
> R: GeometryComponentFilter.cpp:34: virtual void
> geos::geom::GeometryComponentFilter::filter_ro(const
> geos::geom::Geometry*): Assertion `0' failed.
> Aborted (core dumped)
rgeos is tested regularly and frequently, so the issue here is on your
platform, I'm afraid.
>
> I'd like to be able to use the gDistance function. What should I do to fix
> this?
The simplest way is to install GEOS from source, because you avoid relying
on upstream packaging. This will however interfere with other software that
may depend on your existing GEOS.
>
> Please let me know if any additional information would be helpful.
>
> Thank you for your time,
>
> Adrian
>
> [[alternative HTML version deleted]]
>
Please do not post HTML.
Roger
>
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