[OpenLayers-Users] Multiple layers display

[Christopher Schmidt]

On Fri, Aug 15, 2008 at 08:26:19AM +0300, Lehtonen, Mika wrote:
> Hi Greg,
> I believe you need to add layers with:
> 
> map.addLayers([stationsLayer,wms]);
> 
> instead of separate addLayer, though I am not sure if this is the thing 
> preventing both layers to appear.

These two actually work exactly the same, so that's not it.

> Greg Ederer kirjoitti:
> > Oh, and here's my code:
> >
> >   wms = new OpenLayers.Layer.WMS(
> >     "esv:countries - Tiled", "http://localhost:8080/geoserver/wms",
<Snip>

> >  
> >   map.addLayer(stationsLayer);
> >  
> >   map.addLayer(wms);
> >

Neither of your layers is an 'overlay'/non baseLayer.

You should set 'transparent': true on one layer's parameters (3rd hash)
or 'isBaseLayer': false to one layer's options (fourth hash).

Either of these should make the layer an 'overlay'.

Only one base layer should be visible on a map at once. 

Adding a Control.LayerSwitcher would allow you to switch between them.

Regards,
-- 
Christopher Schmidt
MetaCarta