[postgis-users] Determining % of Overlap Between 2 Polys

Willy-Bas Loos willybas at gmail.com
Wed Apr 16 02:45:53 PDT 2008


I can think of no other possible way.
The percentage of overlap between two polygons is determined by the area of
one of the polygons and the area of their overlap, so all of these factors
must be detemined, no matter how you look at it.

cheers,

WBL

On Mon, Apr 14, 2008 at 10:42 PM, Dylan Lorimer <edylan at google.com> wrote:

> Is the best way to compute amount of overlap between to polygons to find
> their intersection and then use the area function? I'll be doing this on
> millions of polys so am concerned about figuring out the most efficient way
> to do this.
> Cheers,
> dylan
>
> --
> Dylan Lorimer | Strategic Partner Management
> 415.573.2909 (Grand Central) | 650.644.0182 (Fax)
>
> If you received this communication by mistake, please don't forward it to
> anyone else (it may contain confidential or privileged information), please
> erase all copies of it, including all attachments, and please let the sender
> know it went to the wrong person.  Thanks.
> _______________________________________________
> postgis-users mailing list
> postgis-users at postgis.refractions.net
> http://postgis.refractions.net/mailman/listinfo/postgis-users
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/postgis-users/attachments/20080416/72379328/attachment.html>


More information about the postgis-users mailing list