Hi guys,
I'm developing a little webgis and I need to use some wms layer that are
requested in two different ways:
- when the map resolution is <= 305.7481130859375 I want to request the
cached layer (with TileCache)
- when the resolutione is > 305.7481130859375 I want to send directly the
wms request to mapserver
I did something like the following
var res = map.getResolution();
if (res <= 305.7481130859375) {
//use wms request on mapserver
bovini = new OpenLayers.Layer.WMS( "Bovini",
"http://brucellosi.izs.it/cgi-bin/mapserv?";,
{map:
'/usr/local/apache2/htdocs/mapfiles/brucellosi_alessio.map',
transparent:'true', layers: 'a_bovini',
'format':'png'},
{'reproject': false, singleTile:true, isBaseLayer:
false} );
bovini.setVisibility(false);
map.addLayer(bovini);
bovini_q = new OpenLayers.Layer.WMS( "Bovini_q",
"http://brucellosi.izs.it/cgi-bin/mapserv?";,
{map:
'/usr/local/apache2/htdocs/mapfiles/brucellosi_alessio.map',
transparent:'true', layers: 'a_bovini_q',
'format':'png'},
{'reproject': false, singleTile:true, isBaseLayer:
false} );
bovini_q.setVisibility(false);
map.addLayer(bovini_q);
bovini_p = new OpenLayers.Layer.WMS( "Bovini_p",
"http://brucellosi.izs.it/cgi-bin/mapserv?";,
{map:
'/usr/local/apache2/htdocs/mapfiles/brucellosi_alessio.map',
transparent:'true', layers: 'a_bovini_p',
'format':'png'},
{'reproject': false, singleTile:true, isBaseLayer:
false} );
bovini_p.setVisibility(false);
map.addLayer(bovini_p);
} else if (res > 305.7481130859375) {
//ask for tilecache tiles on the disk
bovini = new OpenLayers.Layer.WMS( "Bovini", tilecache,{layers:
'a_bovini'},{isBaseLayer: false} );
map.addLayer(bovini);
bovini_q = new OpenLayers.Layer.WMS( "Bovini_q", tilecache,{layers:
'a_bovini_q'},{isBaseLayer: false} );
map.addLayer(bovini_q);
bovini_p = new OpenLayers.Layer.WMS( "Bovini_p", tilecache, {layers:
'a_bovini_p'}, {isBaseLayer: false} );
map.addLayer(bovini_p);
}
The problem is that this solution works only in selecting the "starting
source"...
In this case, at the beginning, tilecache is correctly selected as layer
source, but if I zoomIn (and my resolution becames > 305.748...) the layer
is not
requested to mapserver wms but still to tilecache...
--
View this message in context:
http://n2.nabble.com/asking-the-same-layer-to-mapserver-and-tilecache-depending-on-resolution-tp2321107p2321107.html
Sent from the OpenLayers Users mailing list archive at Nabble.com.
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