[Qgis-user] RE: Qgis-user] openlayers layers without properties is it possible to alter brightness/contrast
M.E.Dodd
m.e.dodd at open.ac.uk
Tue Feb 28 02:32:24 PST 2012
Excellent, works fine, just what I wanted, thanks.
-----Original Message-----
From: Richard Duivenvoorde [mailto:rdmailings at duif.net]
Sent: 28 February 2012 10:24
To: qgis-user at lists.osgeo.org; M.E.Dodd
Subject: Re: [Qgis-user] RE: Qgis-user] openlayers layers without properties is it possible to alter brightness/contrast
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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