Re: [Qgis-user] RE: Qgis-user] openlayers layers without properties is it possible to alter brightness/contrast

Tue, 28 Feb 2012 02:23:51 -0800 

On 02/28/2012 10:42 AM, M.E.Dodd wrote:

Thanks for the suggestion, I tried putting the opacity value here:

var osm = new OpenLayers.Layer.OSM(
               "OpenStreetMap",
               "http://tile.openstreetmap.org/${z}/${x}/${y}.png",opacity:0.5
               {

In the openstreetmaps .html but that made the map vanish altogether so I 
removed the 'opacity:0.5' and osm map reappeared again.  Do I need to stick it 
somewhere else in the .html file?
It is a property which you should add in the 'options'-object (I'm talking OpenLayers lingua now, have a look at OpenLayers.org): 

So, change this in osm.html:

            var osm = new OpenLayers.Layer.OSM(
              "OpenStreetMap",
              "http://tile.openstreetmap.org/${z}/${x}/${y}.png";,
              {
                eventListeners: {
                  "loadstart": layerLoadStart,
                  "loadend": layerLoadEnd
                }
              }
            );

Into this:
            var osm = new OpenLayers.Layer.OSM(
              "OpenStreetMap",
              "http://tile.openstreetmap.org/${z}/${x}/${y}.png";,
              {
                eventListeners: {
                  "loadstart": layerLoadStart,
                  "loadend": layerLoadEnd
                }
                ,opacity:0.5
              }
            );

This should work :-)

Regards,

Richard Duivenvoorde
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