[postgis-users] Midpoint function?

[Pradeep B V]

Is there any other function equivalent to the line_interpolate_point(the_geom,
0.5) to find the midpoint of a MULTILINESTRING?

the line_interpolate_point works only with LINESTRINGS.

- Pradeep B V
www.btis.in


On 6/21/07, Rodrigo Martín LÓPEZ GREGORIO <
rodrigomartin at lopezgregorio.com.ar> wrote:
>
> Hi Matt.
>
> I think what you want may be:
>
> line_interpolate_point(the_geom,0.5)
>
> (or ST_line_interpolate_point(the_geom,0.5) depending on your Postgis
> version)
>
> where the_geom is a linestring and 0.5 means half of the total 2d length
> of the linestring.
>
> You can reed more details in the documentation:
>
> http://postgis.refractions.net/docs/ch06.html#line_interpolate_point
>
> Rodrigo
>
> On 6/21/07, Matt Doughty < matt.doughty at geograma.com> wrote:
> >
> >  Hi List,
> >
> >
> >
> > Is there a function in PostGIS that finds the midpoint of a line?
> >
> >
> >
> > Matt
> >
> >
> >
> >
> >
> >
> >
> > Matt Doughty
> >
> >   GEOGRAM A S.L.
> >
> > Tel.:  +34 945 13 13 72    652 77 14 15
> >
> > Fax: +34 945 23 03 40
> >
> > www.geograma.com
> >
> >
> >
> >
> >
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> >
> >
>
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