[OpenLayers-Users] Buffer objects (parcels, buildings, streets, etc)

[Andreas Hocevar]

Hi,

On Tue, Jun 23, 2009 at 5:11 PM, soatley<shawn at niagarafalls.ca> wrote:
>
> Is there a method that exists that will allow a user to click on the map and
> then 'buffer' the object by a certain distance?

If you want to do this on the client side: Tim Schaub has developed
basic buffering in a sandbox. Currently, there seems to be some
interest in this again. See [1].

Another option that Tim Coulter and I have implemented successfully in
a project is using a WFS (e.g. GeoServer) and query the features
inside the buffer on the server side. This is as easy as issuing a
request with a DWITHIN filter, which OpenLayers does support.

Regards,
Andreas.

[1] http://openlayers.org/pipermail/users/2009-June/012419.html


> For example, our Planning department sends out mailings and they need to
> 'select all properties within 300 metres'.  So, currently, they would select
> the property and then have a list of all properties within their distance.
>
> Other departments would use it where they may want to contact owners within
> a certain distance of a building.
>
> We have this data already, just need to know if OL can perhaps calculate the
> BBOX based on a distance from a point.
>
> Thanks!
> Shawn
> --
> View this message in context: http://n2.nabble.com/Buffer-objects-%28parcels%2C-buildings%2C-streets%2C-etc%29-tp3143082p3143082.html
> Sent from the OpenLayers Users mailing list archive at Nabble.com.
>
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-- 
Andreas Hocevar
OpenGeo - http://opengeo.org/
Expert service straight from the developers.