[OpenLayers-Users] controlling number of off-edge tiles that loads

[Barry Hunter]

Ah thanks to you both!

I forgot that WMS layer is based on the grid one, just knew it had to be a
simple setting somewhere.

BTW the new documentation (I think its new in the past few days?) is a huge
improvement :)

(also sorry Chris for the duplicate email, another newbie error :(

On 7/29/07, Christopher Schmidt <crschmidt at metacarta.com> wrote:
>
> On Sun, Jul 29, 2007 at 08:18:11PM +0100, Barry Hunter wrote:
> > This is almost certainly a very simple question, and I sure I saw
> something
> > mentioning this somewhere, but darned if can find it now...
> >
> > Anyway I have created a custom layer, which is based on the WMS layer -
> it
> > all works great and displays fine. However many more tiles than are
> needed
> > are fetched,  this is understandable its 'precaching' tiles so that the
> user
> > can drag in any direction quickly.
> >
> > For example only 24 tiles are needed to fill the whole screen (including
> > part tiles) - however 52 tiles are retrieved, this is a bit overkill, I
> > would be happy with the user having to wait a bit rather than download
> that
> > many tiles unneeded. I guess there is simple setting to adjust this?
>
>
> http://dev.openlayers.org/docs/files/OpenLayers/Layer/Grid-js.html#OpenLayers.Layer.Grid.buffer
>
> WMS('a', 'url', {'params':'here'}, {buffer: 0})
>
> -- Chris
>



-- 
Barry

- www.nearby.org.uk - www.geograph.org.uk -
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