[mapserver-users] Show tiles only in current extent

Steve Lime Steve.Lime at dnr.state.mn.us
Tue Sep 8 18:21:34 EDT 2009


You're using OpenLayers? If so then that's a question for that mailing list I guess. There are configuration
options to limit the number of tiles retrieved. I believe it's a 'ratio' parameter passed when instantiating a
layer and if set to 1 you don't get anything beyond the view port.

Steve

>>> On 9/8/2009 at 12:08 PM, in message <1252429728233-3604671.post at n2.nabble.com>,
luciosoto <luciosoto at hotmail.com> wrote:

> Hello everyone, i need your valuable help with this issue I have:
> 
> I'm running MapServer 4.8.1 over Apache 2.2.1 in Windows, and also TileCache
> 2.1 using mod_python, everything is great so far, but i want to improve the
> performance when displaying the maps by only showing the tiles in the
> current extent, let me explain: I've noticed that when I zoom in the
> mapserver in some way (that I'm too stupid to find out) takes the
> coordinates and starts sending the request to get the tiles one by one, i
> see that sometimes it downloads up to 70 tiles when looking at the screen no
> more than 20 would be neccesary to fill the screen, so that is the question,
> how do i make mapserver to show me just the necessary stuff instead of
> downloading tiles that are close to the visible area but are not necessary
> anyway?
> 
> Thank a lot.



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