[postgis-users] polygon points

[Guido Lemoine]

Try:

  select pointn(ExteriorRing(polygon_geom), n) from poly_table

and loop through n (1 .. npoints(ExteriorRing(polygon_geom))

Extend to interiorrings, if relevant. Use the X() function to get at the
X-coordinate to check.

GL

Frances Collier wrote:

> Hello all,
>
>  
>
> Is there a function that can get the individual points from a polygon 
> geometry? I am trying to find all the points in the wkb_geometry that 
> matches with a particular X value.
>
>  
>
> Thank you for any help.
>
> -Frances Collier
>
>  
>
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