[geos-devel] predicates precision
mtnclimb at telus.net
Fri Sep 7 12:10:40 PDT 2012
GEOS uses the same algorithm for the binary predicates as JTS.
Unfortunately, recently a GEOS ticket was filed that revealed a small
robustness problem with the predicates in certain Line/Line situations.
(http://trac.osgeo.org/geos/ticket/572). Currently there's no
resolution for this problem, but it's being actively researched.
On 8/27/2012 3:38 AM, Jasmin FORMONT wrote:
> Hi everyone,
> I have a question concerning the precision of predicates, and mainly
> touches. On the JTS website, I read "The algorithms used to implement
> the SFS predicates and functions have been developed to eliminate or
> minimize robustness problems. The binary predicate algorithm is
> completely robust."
> In GEOS, is combinatorial also used for the binary predicates, and are
> they totally robust ?
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