Re: [Geoserver-users] Labeling Polygons

[David W. <dwi...@op...>]

GeoServer only takes into account the current viewing area when 
rendering.  OpenLayers, by default, loads up a map by fetching lots of 
256x256 pixel tiles, rather than asking geoserver to render a lot of 
area you've already fetched when you pan just a little bit.  If you set 
your OpenLayers or other map client to "untiled" mode, then you will 
never see repeated labels.  This will keep your browser from being able 
to cache tiles and such, though, so expect a higher load on GeoServer as 
a result.

--
David Winslow
OpenGeo - http://opengeo.org/

On 07/16/2010 01:31 PM, Ricardo Bayley wrote:
> Thanks Andy, I was thinking a similar approach using Filter Functions 
> using the centroid. It says "Returns the centroid of the geometry. Can 
> be often used as a label point for polygons, though there is no 
> guarantee it will actually lie inside the geometry"
>
> http://docs.geoserver.org/stable/en/user/filter/function_reference.html
>
> I was hoping for a better approach.
>
> Does anybody know why GS labels more than once the same object/feature ?
>
>
> Regards
>
>
>
> On Fri, Jul 16, 2010 at 1:56 PM, Andy Norman <an...@no... 
> <mailto:an...@no...>> wrote:
>
>      On 16/07/2010 16:54, Ricardo Bayley wrote:
>     > I am labeling polygons. When zoomed in, labels for the same polygon
>     > get repeated inside the polygon.
>     > Is there a way of setting that each polygon sould be labeled once ?
>     > I thought that the maxDisplacement vendor option would be a good
>     > approach, but polygon is still being labeled more than once.
>     I had that problem as well. I resolved it by adding a view to the
>     database that returned a point for the centroid of the polygons I
>     needed
>     to label.
>
>     Then I labelled those points instead.
>
>     No doubt there is a better way to achieve it, but that worked for me.
>
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