[pgrouting-dev] difference between st_convexhull and pgr_pointsAsPolygon

[Dave Potts]

On 14/04/15 02:23, Vicky Vergara wrote:
>
>
> > Date: Mon, 13 Apr 2015 20:50:47 +0100
> > From: dave.potts at pinan.co.uk
> > To: pgrouting-dev at lists.osgeo.org
> > Subject: [pgrouting-dev] difference between st_convexhull and 
> pgr_pointsAsPolygon
> >
> > Hi list
> >
> > I am doing some with the end results of a driving distance calculation,
> > I can use either st_convexhull or pgr_pointsAsPolygon to turn the end
> > results in to a polygon
> >
> > Q. What is the advantage of using pgr_pointsAsPolygon instead of using
> > st_convexhull?
> >
> > regards
> >
> > Dave.
> > _______________________________________________
> > pgrouting-dev mailing list
> > pgrouting-dev at lists.osgeo.org
> > http://lists.osgeo.org/mailman/listinfo/pgrouting-dev
>
> By inspecting pgRouting code, there is some checking taking place...
> https://github.com/pgRouting/pgrouting/blob/develop/src/driving_distance/sql/routing_dd.sql#L77
>
> But now that you are one it, does it give you different results?
Hi

No Idea, just noted the two different ways of doing and wondered why 
there was an extra method in the pg route package to do something that 
you got by default from postgis.
>
> Vicky.
>
>
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