GeoWebCache can help by generating oversized tiles and splitting them up
into 256px square tiles for actual serving.
http://geowebcache.org/docs/current/concepts/metatiles.html
Actually, GeoServer has some basic support for this, but GeoWebCache has
configurable metatile size.
http://docs.geoserver.org/latest/en/user/services/wms/vendor.html#tiled
Hope it helps.
--
David Winslow
OpenGeo - http://opengeo.org/
On Tue, Aug 14, 2012 at 4:17 PM, Ákos Maróy <[email protected]> wrote:
> Andrea,
>
> > Generally speaking this is impossible. There is in fact no way to know
> > if the other
> > part of the label is going to get drawn, because that depends on the
> label
> > contents of the other tile, its label priorities and displacement options
> >
> > If you are 100% sure that the other labels is always going to be labelled
> > then you could try to add a new vendor option "allowPartials" that makes
> > the renderer draw cut labels in the hope that the other part will be
> drawn
> > in the nearby tiles (which in turn depend on their nearby tiles and so
> on,
> > making the labelling problem a global one, and thus incompatible with
> > the piecemeal nature of tiled requests).
> >
> > Which is something that can actually be achieved if you lay out the label
> > placement points by hand and for each zoom level on a global basis... if
> > instead you rely on automatic placement, that's quite unlikely to work
> for
> > all labels.
>
> I see - indeed, this doesn't seem like an easy thing to do.
>
> an additional problem would be that the 'right neighbor' tile that gets
> just the end of a label from the 'left neighbor', well, how would that
> tile know what labels to render partially? should it look 'left' for
> some distance, and figure it out?
>
> hm, interesting problem.
>
>
> Akos
>
>
>
>
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