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<div class="moz-cite-prefix">On 14/04/15 02:23, Vicky Vergara wrote:<br>
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<div>> Date: Mon, 13 Apr 2015 20:50:47 +0100<br>
> From: <a class="moz-txt-link-abbreviated" href="mailto:dave.potts@pinan.co.uk">dave.potts@pinan.co.uk</a><br>
> To: <a class="moz-txt-link-abbreviated" href="mailto:pgrouting-dev@lists.osgeo.org">pgrouting-dev@lists.osgeo.org</a><br>
> Subject: [pgrouting-dev] difference between st_convexhull
and pgr_pointsAsPolygon<br>
> <br>
> Hi list<br>
> <br>
> I am doing some with the end results of a driving
distance calculation, <br>
> I can use either st_convexhull or pgr_pointsAsPolygon to
turn the end <br>
> results in to a polygon<br>
> <br>
> Q. What is the advantage of using pgr_pointsAsPolygon
instead of using <br>
> st_convexhull?<br>
> <br>
> regards<br>
> <br>
> Dave.<br>
> _______________________________________________<br>
> pgrouting-dev mailing list<br>
> <a class="moz-txt-link-abbreviated" href="mailto:pgrouting-dev@lists.osgeo.org">pgrouting-dev@lists.osgeo.org</a><br>
> <a class="moz-txt-link-freetext" href="http://lists.osgeo.org/mailman/listinfo/pgrouting-dev">http://lists.osgeo.org/mailman/listinfo/pgrouting-dev</a><br>
<br>
By inspecting pgRouting code, there is some checking taking
place...<br>
<a moz-do-not-send="true"
href="https://github.com/pgRouting/pgrouting/blob/develop/src/driving_distance/sql/routing_dd.sql#L77"
target="_blank">https://github.com/pgRouting/pgrouting/blob/develop/src/driving_distance/sql/routing_dd.sql#L77</a><br>
<br>
But now that you are one it, does it give you different
results?<br>
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Hi <br>
<br>
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.<br>
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Vicky.<br>
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