[pgrouting-users] Help with Routing from Point to Point

[Daniel Kastl]

Hi,

I made a comment to your forum post:
http://pgrouting.postlbs.org/discussion/topic/353#message1467

Hope it helps.
Daniel



-- 
Georepublic UG & Georepublic Japan
eMail: daniel.kastl at georepublic.de
Web: http://georepublic.de



2010/4/17 agentsees <agentsees at gmx.net>

> Hi!
>
> I posted this topic also on the forum and hope to get answers.
> http://pgrouting.postlbs.org/discussion/topic/353
>
>
> > Hello!
> >
> > I am searching for a solution to route from a Point on a line to another
> > point on a line. I wonder why this hasnt been implemented yet in
> > pgrouting, because i think its (one of the) most used feature! What i
> > got till now is routing with different algorithms on Openstreetmap data
> > from and to vertices and edges. I have sucessfully calculated the
> > nearest points on the nearest edge to my start and endpoints. I tried to
> > fill the missing last part with the tutorial from here :
> > http://pgrouting.postlbs.org/wiki/LoadingtheCode5
> > But i could not get it working. The function throws errors on the
> > following SQL statement:
> >
> > SELECT
> >
> astext(give_we_wkt(".$startEdge['gid'].",".$ergebnis_nebengeometrie_anfang_gid.",'".
> > $point_on_line_anfang."'))
> >
> > It says, that st_intersects is neither false nor true on:
> > SELECT INTO p ST_intersects(line,buffer($3,1));
> >
> > I think the problem is the creation of the linestring ('line') in the
> > functioncode, because i can see errors which tell me that "||" is not an
> > allowed operator.
> > The linestring itself remains empty and maybe thats why the function
> fails.
> > Has somebody an idea how to fix this?
> >
> > Is there no other / easier solution to route from one point to another?
> >
> > Thanks for answers in adavance!
> >
> > J. Weskamm
> > _______________________________________________
> > Pgrouting-users mailing list
> > Pgrouting-users at lists.postlbs.org
> > http://lists.postlbs.org/mailman/listinfo/pgrouting-users
> >
> >
>
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