On Thu, Sep 26, 2013 at 11:22 AM, Jakob Ventin <[email protected]> wrote:
> Hello all,
>
> we have a need to add a buffer parameter to our WMS getmap requests.
>
> In Geoserver docs
> (http://docs.geoserver.org/latest/en/user/services/wms/vendor.html#buffer)
> this is explained. Somehow i cannot get this working.
>
> Can anyone open up what the parameter 'buffer' actually does, how it is
> thought to be used and the correct syntax. Is there a maximum value for the
> buffer?
>
> What we want to achieve is uncut labels over tile boarders. As for now, we
> are using a (quite big) buffer and metatiles in Getmap requests sent from
> our cache service. We hope that buffering could be done in Geoserver. This
> would decrease the actual amount of data being transferred.
>
What you are looking for is a "gutter", not a buffer.
The buffer parameter grows the area that is being queried on the data
source,
not the one of the painted map, won't help in your case.
The best way to reduce data transfer is to use the internal GWC, no data
transfer
at all, tiles are painted and sliced in memory and written on disk directly
without
any intermediate png file generation.
Cheers
Andrea
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