[OpenLayers-Users] application/openlayers from GeoServer VS OpenLayers JS code

[Brent Pedersen]

hi, your geoserver map is generating 1 big image, so there are no
rendering issues at the edges of images. that's also why it's faster.
your other map is generating tiles. so you're seeing the edge effects.
you can get rid of hte edge effects, and improve the speed by using
tilecache.
-b

On Fri, May 23, 2008 at 7:10 AM, springrider <springrider at hotmail.com> wrote:
>
> Hello
>
> I come back with live examples. It will easier for you to understand my
> problem.
>
> This is the OL map generated by Geoserver:
> http://193.43.36.238:8484/geoserver/wms?bbox=-198.0,-96.68453554694977,198.0,98.88973978794988&styles=&Format=application/openlayers&request=GetMap&version=1.1.1&layers=fifao:FAO_DIVISION,fifao:CONTINENTS_LN1&width=800&height=370&srs=EPSG:4326
>
> And this is the one created in a Web page based on the OpenLayers library
> 2.6:
> http://193.43.36.238:8484/figis_GIS/Development/openlayers.html
>
> The second map is always longer to load probably because of the number of
> layers and a bigger OpenLayers. js script.(2s vs 2.8s)
>
> When i zoom in, the blue polygons always take longer in my web page than in
> the Geoserver view to be redisplayed.
> I made some improvements in my code by having for example one unique WMS
> layer for displaying transparent layers:
>
> var wms = new OpenLayers.Layer.WMS("All
> Areas","http://193.43.36.238:8484/geoserver/wms?service=wms",
>                                                                {layers:'fifao:FAO_DIVISION,fifao:CONTINENTS_LN1',
>                                                                transparent:"true"},{wrapDateLine: true}
>                                                                );
> but any feedback about your experience to improve display would be welcome.
> I tried to play with the format (png/gif/jpeg) but i don't know what would
> be the best option.
>
> More important is the fact that the view displayed in the Web page based on
> OL 2.6 is not correct, some lines composing my polygons are missing (see
> between Africa and South america) while in the OL view provided by
> Geoserver, the line is correctly displayed.
> See the screen shot below:
> http://www.nabble.com/file/p17426479/Untitled-2%2Bcopy.jpg
>
> I have no idea why the behaviour is so different, is it a bug?
>
> Thanks for you help
>
> Sylvain
> --
> View this message in context: http://www.nabble.com/application-openlayers-from-GeoServer-VS-OpenLayers-JS-code-tp17426479p17426479.html
> Sent from the OpenLayers Users mailing list archive at Nabble.com.
>
> _______________________________________________
> Users mailing list
> Users at openlayers.org
> http://openlayers.org/mailman/listinfo/users
>