In which case why not just extend ST_StartPoint to include this
behaviour? Always nicer to keep the function list as short as possible.
On 9/27/2012 7:31 AM, David William Bitner wrote:
Perhaps to match a number of people's expectations, there should be an
ST_First Point() that is basically
ST_StartPoint(ST_GeometryN(ST_Multi(geometry),1))
On Tue, Sep 25, 2012 at 4:08 PM, Paul Ramsey <pram...@opengeo.org
<mailto:pram...@opengeo.org>> wrote:
When ST_NumGeometries == 1, you can run ST_StartPoint on
ST_GeometryN(geom,1). Where ST_NumGeometries > 1 you are in
"interpretation land". What's the start point of a geometry with two
lines?
P.
On Tue, Sep 25, 2012 at 1:38 PM, David Quinn
<daithiqu...@gmail.com <mailto:daithiqu...@gmail.com>> wrote:
> As ST_StartPoint( multilinestring ) returns NULL for PostGIS 2.0
> (http://postgis.refractions.net/docs/ST_StartPoint.html ), what
> approach can be used to identify the start and end points of a
> multilinestring?
>
> Thanks,
> David
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