Hi,
Mapbuilder does reprojection when configured properly. Can you please
describe what you want to achieve (e.g. display a vector layer which
has features in a different srs)? I'm sure there is a way to do what
you need without custom code.
Regards,
Andreas.
On Wed, Jun 4, 2008 at 11:14 AM, pepe pepe <[EMAIL PROTECTED]> wrote:
> 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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