[postgis-users] Point inside a polygon

[Åsmund Tokheim]

Hi

You can use st_closestpoint(geom, st_centroid(geom)) to make sure that the
returned point is in most circumstances at or near the centroid, and always
at least on the boundary of the polygon. While st_pointonsurface certainly
will be faster, it will often choose a more random point on the surface.

Åsmund


On Fri, May 2, 2014 at 12:45 PM, Nicolas Ribot <nicolas.ribot at gmail.com>wrote:

> Hi,
>
> Use st_pointOnSurface (
> http://postgis.net/docs/manual-2.1/ST_PointOnSurface.html)
>
> Nicolas
>
>
> On 2 May 2014 06:32, J.Alejandro Martinez Linares <islanis at infomed.sld.cu>wrote:
>
>> Hi people, i need your help, i was using st_centroid to get a point that
>> be inside a polygon butr st_centroid got a property  that is a problem to
>> me, it returns a point that not always is inside the polygon, cause when
>> the polygon has an irregular form, the point that st_centroid is outside
>> the polygon, and i need a function that do a similar thing that st_centroid
>> but i need that the point it returns always be inside the polygon, is there
>> a function that do that?
>>
>> cheers.
>>
>> --
>>
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