Re: [Jts-topo-suite-user] crosses relationship

[João S. <joa...@gm...>]

Thanks!
Em 28/11/2012 14:59, "Martin Davis" <mtn...@gm...> escreveu:

> If you mean "Is this result correct?" then the answer is yes.  The OGC SFS
> definition for crosses
> can be stated as "The interiors of the geometries have some but not all
> points in common".  In this case
> the interior of the Point geometry contains a single point, which lies in
> the interior of the linestring.
> So it does not have any interior points *not* in the interior of the line,
> which would be required
> for the crosses relationship to hold.
>
> See
> http://tsusiatsoftware.net/jts/javadoc/com/vividsolutions/jts/geom/Geometry.html#crosses(com.vividsolutions.jts.geom.Geometry)
>
> If you mean "Does the OGC SFS definition of crosses make sense", that's a
> more subjective question.  One take on this is that it doesn't really make
> sense to ask if a line "crosses" a point.  But for consistency the
> predicates are defined over all possible combinations of geometry, whether
> or not it makes sense.
>
> On Wed, Nov 28, 2012 at 8:24 AM, João Sávio <joa...@gm...> wrote:
>
>> Is it make sense? I'm using maven 1.12 version
>>
>> LineString g1 =  (LineString) new WKTReader().read("LINESTRING (-1 0, 1
>> 0)");
>> Point g2 =  (Point) new WKTReader().read("POINT (0 0)");
>>
>> *System.out.println(g1.crosses(g2)); // returns false!!!*
>>
>>
>>
>>
>>
>
>
> ------------------------------------------------------------------------------
> Keep yourself connected to Go Parallel:
> INSIGHTS What's next for parallel hardware, programming and related areas?
> Interviews and blogs by thought leaders keep you ahead of the curve.
> http://goparallel.sourceforge.net
> _______________________________________________
> Jts-topo-suite-user mailing list
> Jts...@li...
> https://lists.sourceforge.net/lists/listinfo/jts-topo-suite-user
>
>