[OpenLayers-Users] Performance

[Yves Jacolin]

Thank you very much Vincent ! I changed my mapfile to set up imagetype to gif 
and the performance is really great! 

See you in the tilecache mailing list ;-)

Y.
Le Mardi 27 Février 2007 18:39, Vincent Picavet a écrit :
> Le Mardi 27 Février 2007 18:20, Yves Jacolin a écrit :
> > Hi,
>
> Hi Yves,
>
> > I am using OL with a WMS serveur (same layer than the vmap0 WMS from
> > metacarta). All this is hosted by a quiet good server. But the 'tiles'
> > take some time to be displayed. Do you have some ideas to improve the
> > speed of the WMS map displaying ? I am using mapserver cgi to manage my
> > WMS service.
>
> First thing to do is to set the image's format and compression. As for
> raster files like satellite or aerial photographies, if you don't need them
> to be transparent, you should use jpeg and set the compression factor to
> get a good size/quality compromise.
>
> Then you can turn Apache's mod_expires on and add those two variables in
> your apache.conf that concerns your WMS server :
>
> ExpiresActive on
> ExpiresDefault "now plus 6 hours"
>
> This will tell the client's browser to keep the images cached instead of
> querying them again when needed.
>
> > I am trying to use TileCache as well to improve this, do you think it is
> > the best thing I have to do? I have some problem to set it up, is it the
> > good list to have some help?
>
> TileCache is definitely the best way to improve performance with
> openlayers. There is a mailing list dedicated to tilecache :
> http://openlayers.org/mailman/listinfo/tilecache
>
> I recommend you this very good and newly update information page about
> tilecache :
> http://docs.codehaus.org/display/GEOSDOC/TileCache+Tutorial
> As for the other questions you may have on this subject, see you on the
> tilecache mailing list :)
>
> Vincent
> _______________________________________________
> Users mailing list
> Users at openlayers.org
> http://openlayers.org/mailman/listinfo/users

-- 
Yves Jacolin
---
http://yjacolin.gloobe.org