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SRS problem

3 messages

oblin

SRS problem

Reply Threaded

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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Andreas Hocevar

Re: SRS problem

Reply Threaded

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 <[hidden email]> 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
> -------------------------------------------------------------------------
> Check out the new SourceForge.net Marketplace.
> It's the best place to buy or sell services for
> just about anything Open Source.
> http://sourceforge.net/services/buy/index.php
> _______________________________________________
> mapbuilder-devel mailing list
> [hidden email]
> https://lists.sourceforge.net/lists/listinfo/mapbuilder-devel
>
>

oblin

Re: SRS problem

Reply Threaded

Hi, thanks for you response. Effects, I show ok a WMS service in WGS84 but now I like to display it with different srs that you could choose.

Oscar.

2008/6/4 Andreas Hocevar <[hidden email]>:

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 <[hidden email]> 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
> -------------------------------------------------------------------------
> Check out the new SourceForge.net Marketplace.
> It's the best place to buy or sell services for
> just about anything Open Source.
> http://sourceforge.net/services/buy/index.php
> _______________________________________________
> mapbuilder-devel mailing list
> [hidden email]
> https://lists.sourceforge.net/lists/listinfo/mapbuilder-devel
>
>