[OpenLayers-Users] doing a search with a buffer

[Eric Lemoine]

On Sunday, May 9, 2010, sunny74 <sb.ray at hotmail.com> wrote:
>
> Hi Friends,
>
> I want to do a search with a buffer.
> My scenario is like this.
> I get a structure Id from the user and using that I get the geometry of that
> structure from the postgres DB.
> Now I want to do a search of all structures within a radius of say 100km
> from the structure selected by the user.
> Is there any postgres function which will give the geometry of all features
> lying within a certain radius of a feature..
>
> Has anybody done something like this before?If yes pls share as to how you
> have done it?

Hi. We do that in MapFish using the && operator, and the expand and
distance functions. See [*]. Hope it can help.

[*] <http://trac.mapfish.org/trac/mapfish/browser/framework/server/trunk/mapfish/lib/filters/spatial.py#L101>

-- 
Eric Lemoine

Camptocamp France SAS
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