Cedric, Here's one idea:
I pasted an example below of how I did something similar. This starts
the map with an untiled world map from the WMS. Once the user changes
the zoom level then the WMS layer is removed and the tile cache (GWC)
layer is added to the map. It isn't done with one layer, but it seems to
accomplish a similar goal. hope this helps.
var worldUntiled = new OpenLayers.Layer.WMS.Untiled(
"Balance Background", wms_path, {
layers: 'world:W_borders',
transparent: false,
isBaseLayer: true
},
{ visibility: false
});
var worldTiled = new OpenLayers.Layer.WMS(
"Balance Background", gwc_path,
{
layers: 'world:W_borders',
transparent: false,
isBaseLayer: true
});
// In your map config, add the worldUntiled layer to the map.... Don't
add the worldTiled layer yet.
//when the user moves the map....
worldUntiled.events.on({
moveend: function(e){
if (e.zoomChanged){
map.removeLayer(worldUntiled);
map.addLayer(worldTiled);
}
}
});
- Ryan
--
Ryan Williams, GISP
GIS Analyst / Programmer
PAQ Interactive Inc.
Monticello, IL
www.paqinteractive.com
On 12/9/2010 12:33 PM, Cédric MOULLET wrote:
Hi,
I'd like to create one Layer which can combine a WMS and a TileCache
layer. The WMS or the TileCache layer will be visible depending of the
zoom level. The first resolutions will be handled by the TileCache
layer and the other resolutions will be handled by the WMS layer.
What would be the best way to achieve that ? Is it possible to imagine
a custom layer type that can switch the layer based on the zoom level ?
Thanks in advance for any hints,
Cédric
--
Welcome to my world: http://www.cedricmoullet.com/
My Linked In profile: http://www.linkedin.com/in/cedricmoullet
Twitter: http://twitter.com/cedricmoullet
Home sweet home:
http://map.geo.admin.ch/?crosshair=bowl&zoom=11&X=185241.24219&Y=561288.90625&bgOpacity=0&selectedNode=node_ch.swisstopo.fixpunkte-lage1
<http://map.geo.admin.ch/?crosshair=bowl&zoom=11&X=185241.24219&Y=561288.90625&bgOpacity=0&selectedNode=node_ch.swisstopo.fixpunkte-lage1>
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