hi all,
I am implementing a function for change the SRS but I'm not how to do it.
Then explain how I'm developing but I think it is not appropriate:
First, with this fuction I'm try to change the SRS, where I manage to make
the new request of the layers with a new EPSG, but the coordinates system
not change.
The line "window.parent.config.objects.mainMap.proj = destProj;" is where I
update the projection map, but I did not make the coordinates passing from
grade and minute to meters automatically, there is a step that it has failed
to perform.
This is the fuction:
function changeView(epsg){
// epsg = "EPSG:23029";
window.parent.config.objects.mainMap.setSRS(epsg);
window.parent.config.objects.mainMap.setParam("srs",epsg);
var bbox=window.parent.config.objects.mainMap.getBoundingBox();
var ul = new Array(bbox[0],bbox[3]);
var lr = new Array(bbox[2],bbox[1]);
var ptUL=new Proj4js.Point(ul[0],ul[1]);
var ptLR=new Proj4js.Point(lr[0],lr[1]);
var proj = window.parent.config.objects.mainMap.proj;
Proj4js.defs["EPSG:23029"] = "+title=ED50 / UTM zone 29N +proj=utm
+zone=29 +ellps=intl +units=m +no_defs ";
var destProj = new Proj4js.Proj("EPSG:23029");
Proj4js.transform(proj, destProj, ptUL);
Proj4js.transform(proj, destProj, ptLR);
window.parent.config.objects.mainMap.proj = destProj;
window.parent.config.objects.mainMap.map.baseLayer.reproject = true;
window.parent.config.objects.mainMap.map.baseLayer.projection =
"EPSG:23029";
window.parent.config.objects.mainMap.map.baseLayer.maxExtent = new
OpenLayers.Bounds(ptUL.x, ptLR.y, ptLR.x, ptUL.y);
window.parent.config.objects.mainMap.refresh(window.parent.config.objects.mainMap);
}
The other function can be found at OpenLayers, in Class
"OpenLayers.Layer.WMS", is just preparing the request of the layer so that
it return the image reproject.
Here, I can't save change of projection and coordinate system, and I have to
made the transformation of the BoundingBox degrees to meters to make the
request properly.
getURL:function(bounds) { // Añadido JJ
if (config.objects.mainMap.getSRS() == "EPSG:23029"){
var bbox = config.objects.mainMap.getBoundingBox();
var ul = new Array(bbox[0],bbox[3]);
var lr = new Array(bbox[2],bbox[1]);
var ptUL=new Proj4js.Point(ul[0],ul[1]);
var ptLR=new Proj4js.Point(lr[0],lr[1]);
var proj = config.objects.mainMap.proj;
Proj4js.defs["EPSG:23029"] = "+title=ED50 / UTM zone 29N +proj=utm
+zone=29 +ellps=intl +units=m +no_defs ";
var destProj = new Proj4js.Proj("EPSG:23029");
Proj4js.transform(proj, destProj, ptUL);
Proj4js.transform(proj, destProj, ptLR);
bounds = new OpenLayers.Bounds(ptUL.x, ptLR.y, ptLR.x, ptUL.y);
}
bounds = this.adjustBounds(bounds);
var imageSize = this.getImageSize();
//window.frames['iframVImprimirImagen'].document.open();
//window.frames['iframVImprimirImagen'].document.write(this.getFullRequestString({BBOX:this.encodeBBOX
? bounds.toBBOX() :
bounds.toArray(),WIDTH:imageSize.w,HEIGHT:imageSize.h}));
//window.frames['iframVImprimirImagen'].document.close();
return this.getFullRequestString({BBOX:this.encodeBBOX ? bounds.toBBOX()
: bounds.toArray(),WIDTH:imageSize.w,HEIGHT:imageSize.h});
}
Please show me how I can do it.
Thank you so much.
Oscar
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