[postgis-users] How to get the centerline of a polygon?

[Eric Yu]

Kevin and Martin,

Thanks for your suggestion! I will try the plug-in. It  looks amazing.

Eric

On Jan 19, 2008 12:35 AM, Kevin Neufeld <kneufeld at refractions.net> wrote:
> Eric,
>
> Are you perhaps after generating voronoi skeletons with your areas?
>
> If so, you may be interested in the free Skeletonizer Utility (SK)
> plugin for JUMP that we developed here at Refractions a while back.
> http://www.jump-project.org/project.php?PID=SK&SID=OVER
>
> This utility will generate voronoi skeletons (center lines) given a
> polygon and a set of input/output points.
>
> The attached picture shows the results using a long narrow lake and
> stream input/output points as input.
>
> Cheers,
> Kevin
>
> -------------
> Kevin Neufeld
> Software Developer
> Refractions Research Inc.
> 300-1207 Douglas St.
> Victoria, B.C., V8W 2E7
>
> Phone: (250) 383-3022
> Email: kneufeld at refractions.net
>
>
>
>
> Eric Yu wrote:
> > Hi,
> >
> > Suppose I have a long shaped polygon, like river area or the road,
> > is it possible to get the centerline of the area using PostGIS?
> > Or with other GIS library/software? I searched and tried but failed to
> > get any solution.
> >
> > Thank!
> >
> > Eric