Re: [Gwt-openlayers-users] Fwd: Reprojection of wns malyer and tranforming of point does not seem to work.

[giuseppe la s. <gla...@gm...>]

Yes john you must use projcode. Tomorrow i send you an example. Regards giuseppe

Inviato da iPhone di Giuseppe La  Scaleia

Il giorno 11/gen/2011, alle ore 21:38, John Preston <byh...@gm...> ha scritto:

> OK, furthur experimentation indicates that if I send the map request
> to geoserver with a different projection then the map is returned ok,
> but the bbox coordinates have to be in the different projection. So
> I'll need the projection transform stuff working but these function
> all seem to do nothing. Do I have to have some other javascripts
> loaded to get this part of gwt-openlayers working
> 
> John
> 
> ---------- Forwarded message ----------
> From: John Preston <byh...@gm...>
> Date: Tue, Jan 11, 2011 at 3:09 PM
> Subject: Reprojection of wns malyer and tranforming of point does not
> seem to work.
> To: gwt...@li...
> 
> 
> I have a problem getting reprojection of wms layer maps working and I
> would apprciate if someone could tell me what I'm doing wrong.
> 
> I have two maps in two different projections and I would like to
> overlay them. I use the following code to do this.
> 
> //////////////////////////////////////////////////////////////////////////////////////////
> MapOptions mapOptions = new MapOptions();
> mapOptions.setNumZoomLevels(10);
> mapOptions.setProjection("EPSG:3448");
> mapOptions.setDisplayProjection(new Projection("EPSG:3448"));
> 
> mapOptions.setUnits("m");
> mapOptions.setMaxExtent(new Bounds(100000, 100000, 900000, 700000));
> mapOptions.setAllOverlays(true);
> mapOptions.setMaxResolutionToAuto();
> 
> mapWidget = new MapWidget("100%", "100%", mapOptions);
> add(mapWidget, new BorderLayoutData(LayoutRegion.CENTER));
> Map map = mapWidget.getMap();
> 
> // Defining a WMS and adding it to the map
> WMSParams wmsParams = new WMSParams();
> wmsParams.setFormat("image/png");
> wmsParams.setLayers("area1");
> wmsParams.setIsTransparent(true);
> wmsParams.setStyles("");
> 
> WMSOptions wmsLayerParams = new WMSOptions();
> wmsLayerParams.setBuffer(0);
> wmsLayerParams.setSingleTile(false);
> wmsLayerParams.setMaxExtent(new Bounds(100000, 100000, 300000, 200000));
> wmsLayerParams.setProjection("EPSG:24200");
> WMS wmsLayer = new WMS("First map on old projection",
> "http://localhost:8086/geoserver/wms", wmsParams, wmsLayerParams);
> 
> // Add layer to open layers map
> map.addLayer(wmsLayer);
> 
> // Defining a WMS and adding it to the map
> wmsParams = new WMSParams();
> wmsParams.setFormat("image/png");
> wmsParams.setLayers("area2");
> wmsParams.setIsTransparent(true);
> wmsParams.setStyles("");
> 
> wmsLayerParams = new WMSOptions();
> wmsLayerParams.setBuffer(0);
> wmsLayerParams.setSingleTile(false);
> wmsLayerParams.setMaxExtent(new Bounds(500000, 500000, 800000, 700000));
> wmsLayerParams.setProjection("EPSG:24200");
> WMS wmsLayer = new WMS("Second map in new projection",
> "http://localhost:8086/geoserver/wms", wmsParams, wmsLayerParams);
> 
> // Add layer to open layers map
> map.addLayer(wmsLayer);
> 
> map.setCenter(new LonLat(400000, 400000));
> //////////////////////////////////////////////////////////////////////////////////////////
> 
> The two maps hold data for adjacent areas but they are in different
> projections. I want to be able to set the map display projection to
> one of the projections, EPSG:3448 for instance, and re-project (on the
> fly) the other map so I can overlay them. Hence I set the map display
> projection to EPSG:3448, and when I am creating the wms layer I set
> the srs of the request to the display projection. However I get an
> empty map if I do this. When I set the projection of the wms request
> to the projection of the data it contains then I get the map but it
> has not been reprojected. I've searched for a simple reprojection
> example to try and follow but I can't find any.
> 
> I've also noticed that if I try to tranform coordinates from one
> projection to another I get no change. When I try the following code
> the coordinates of the lonlat object remain the same instead of them
> being offset by about 500000 for the x and y values.
> 
> LonLat pt = new LonLat(250000, 140000);
> pt.transform("EPSG:3448", "EPSG:24200");
> 
> Do I need to include some extra javascripts to get the projection working.
> 
> Can anyone help me.
> 
> John
> 
> ------------------------------------------------------------------------------
> Protect Your Site and Customers from Malware Attacks
> Learn about various malware tactics and how to avoid them. Understand 
> malware threats, the impact they can have on your business, and how you 
> can protect your company and customers by using code signing.
> http://p.sf.net/sfu/oracle-sfdevnl
> _______________________________________________
> Gwt-openlayers-users mailing list
> Gwt...@li...
> https://lists.sourceforge.net/lists/listinfo/gwt-openlayers-users