Hi,
I am not sure whether I have found an error in the OpenLayers.Layer.WMS class.
I have a Web Map Service that expects the co-ordinates in one of the following
projections: EPSG:25832, EPSG:25833, EPSG:31468, EPSG:31469. My map uses
EPSG:900913. For some reason, the BBOX parameter in the GetMap HTTP request
always was in EPSG:900913 projection.
When I changed the function getURL in the file Layer/WMS.js to the following,
it worked perfectly:
getURL: function (bounds) {
bounds = this.adjustBounds(bounds);
bottomleft = new OpenLayers.Pixel(bounds.left, bounds.bottom);
topright = new OpenLayers.Pixel(bounds.right, bounds.top);
OpenLayers.Projection.transform(bottomleft, this.map.projection,
this.projection);
OpenLayers.Projection.transform(topright, this.map.projection,
this.projection);
var bounds2 = new OpenLayers.Bounds(bottomleft.x, bottomleft.y,
topright.x, topright.y);
var imageSize = this.getImageSize();
var newParams = {};
// WMS 1.3 introduced axis order
var reverseAxisOrder = this.reverseAxisOrder();
newParams.BBOX = this.encodeBBOX ?
bounds2.toBBOX(null, reverseAxisOrder) :
bounds2.toArray(reverseAxisOrder);
newParams.WIDTH = imageSize.w;
newParams.HEIGHT = imageSize.h;
var requestString = this.getFullRequestString(newParams);
return requestString;
},
I assume, this is not a perfect patch, as I am not very experienced in
OpenLayers. But I wanted to show it to you anyway for that you at least get an
idea of what I mean. Maybe, there is another way to achieve the same result,
but I did not find it.
With the files from http://www.galf-dresden.de/geo/proj4js/lib/, I was able to
transform the co-ordinates beween the projections.
I would be glad if you could fix this error (if it is one) in one of the
future versions of OpenLayers.
Best regards,
Jens Lang
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