Hi elshae, you have declared a Layer.WMS. That is a raster layer and can not clientside reprojected. You can request a WMS only in the map projection and hope that the WMS server support this projection. A Layer.GML is a vector layer and the features can reprojected, if you integrate proj4js (only needed for projections other than EPSG:4326 and EPSG:900913). A vector layer can requested for a different projection than the map projection with clientside reprojecting the response. >From the distance it's difficult to get an idea, what could be the issue. I don't know GeoServer or GeoServer Preview. You have to check the data, you want deliver through GeoServer. If it's a shape, use some other program to check the data. You can also try to insert alert(map.getExtent().toBBOX()); at the end of the init function, after setCenter or zoomToExtent for your map and the GeoServer Preview to get an idea of the extents. Arnd _____
Von: IT Intern [mailto:[email protected]] Gesendet: Mittwoch, 22. Dezember 2010 23:57 An: Arnd Wippermann Cc: [email protected] Betreff: Re: [OpenLayers-Users] Re: EPSG:4008 Layer Not Displaying Hello Arnd, Thank you for your continuous effort to help me work through this. I'm not so sure where you said "You should control the extent of your data, which you make availible through GeoServer." In GeoServer, if I select any other EPSG other than 4008, the layer does not display correctly. By default my map is 900913 because I use Open Street Map and Google as my base layers. I'm very surprised that specifying the projection has no effect as I've seen in the proj4js docs that it should be included... Setting the projection of a layer <http://trac.osgeo.org/openlayers/wiki/Documentation/Dev/proj4js#Settingthep rojectionofalayer> ¶ If the layer's projection is different from the one used by the map, you need to specify what projection that is: var layer = new OpenLayers.Layer.GML(geojsonUrl, {format:OpenLayers.Format.GeoJSON, projection: new OpenLayers.Projection("EPSG:28993")}); map.addLayer(layer); http://trac.osgeo.org/openlayers/wiki/Documentation/Dev/proj4js I'm sorry for not understanding very well what to do next. When you say that you think my problem is the data I want to display, could it mean that it might be impossible to display this data on my map? Thank you very much for explaining all this to me, elshae On Wed, Dec 22, 2010 at 4:12 PM, Arnd Wippermann <[email protected]> wrote: Hi, var bounds = new OpenLayers.Bounds( -2880104.25, 2070327.125, -1038944.658, 3262434.769 ); surely describe nothing in degree. A map in degree units goes from -180 W to +180 E and -90 S to 90 N. A resolution of 7192 means, that one pixel displays an area of 7192 x 7192 square units, what is much more than 360x180 for the whole world in degree. It seems, that the data, which are displayed with GeoServer Preview, are not in degree and perhaps not in EPSG:4008 with the parameter "+proj=longlat +ellps=clrk66 +no_defs". You should control the extent of your data, which you make availible through GeoServer. By default is your map in EPSG:4326 as you create the map without a projection in the map options. Also has it no effect, if you add projection: "EPSG:4008" as a param to your WMS declaration. The WMS request get added SRS=EPSG:4326 as it is the map projection. I think the problem are the data, you want to display. Arnd _____ Von: IT Intern [mailto:[email protected]] Gesendet: Mittwoch, 22. Dezember 2010 16:34 An: Arnd Wippermann Cc: [email protected] Betreff: Re: [OpenLayers-Users] Re: EPSG:4008 Layer Not Displaying Hello Arnd, I tried out your suggestion but I am still at a lost here. I happened not to get any error messages, but my layer didn't appear at all when I changed these params. I tried with SRS 4326 and 900913 since my map has base layers of 900913 and overlays of 4326. I also changed the bbox to -20037508.34, -20037508.34, 20037508.34, 20037508.34 (the bbox of my current map). I also notice that for this EPSG:4008 layer I see -2369470.14441, 2720321.16942 Scale = 1 : 2854176M as opposed to another layer of mine (EPSG:4326) on my map which shows 98.29099, 28.50735 Scale = 1 : 2M In it's GeoServer preview. So at this point I'm assuming it has something to do with the scale of my layer.. In the OpenLayers code of the GeoServer preview, they have: var bounds = new OpenLayers.Bounds( -2880104.25, 2070327.125, -1038944.658, 3262434.769 ); var options = { controls: [], maxExtent: bounds, maxResolution: 7192.02965625, projection: "EPSG:4008", units: 'degrees' }; map = new OpenLayers.Map('map', options); // setup tiled layer tiled = new OpenLayers.Layer.WMS( "sedac - Tiled", "http://localhost:8080/geoserver/wms";, { height: '331', width: '512', layers: 'cite:sedac', styles: '', srs: 'EPSG:4008', format: format, tiled: 'true', tilesOrigin : map.maxExtent.left + ',' + map.maxExtent.bottom }, { buffer: 0, displayOutsideMaxExtent: true } ); // setup single tiled layer untiled = new OpenLayers.Layer.WMS( "sedac - Untiled", "http://localhost:8080/geoserver/wms";, { height: '331', width: '512', layers: 'cite:sedac', styles: '', srs: 'EPSG:4008', format: format }, {singleTile: true, ratio: 1} ); map.addLayers([untiled, tiled]); I instead, set the params they have for their map in my layer because if I set my map specific to this layer, other layers won't work as expected... For the map I have: var options = { controls: [new OpenLayers.Control.Navigation()], //Needed to use GeoExt controls such as the zoomslider maxExtent: new OpenLayers.Bounds(-20037508.34, -20037508.34, 20037508.34, 20037508.34), units: 'm', allOverlays: false //Do not display all layers on load } var map = new OpenLayers.Map(options); and for my EPSG:4008 layer I have: var bounds = new OpenLayers.Bounds(-2880104.25, 2070327.125, -1038944.658, 3262434.769); var borders = new OpenLayers.Layer.WMS( "Borders", "http://localhost:8080/geoserver/wms";, {id: 'borders', layers: 'cite:sedac', transparent: true, maxExtent: bounds, maxResolution: 7192.02965625, projection: "EPSG:4008", units: 'degrees'}, {isBaseLayer: false, displayInLayerSwitcher: true, visibility: true, displayOutsideMaxExtent: true} ); Any further help would be greatly appreciated :) Thank you, elshae On Tue, Dec 21, 2010 at 6:09 PM, Arnd Wippermann <[email protected]> wrote: Hi, build the WMS request for your layer and test it in the browser. Change the BBOX, SRS. Perhaps you get some error message. http://localhost:8080/geoserver/wms?LAYERS=cite%3Asedac <http://localhost:8080/geoserver/wms?LAYERS=cite%3Asedac&FORMAT=image%2Fpng&; VERSION=1.1.1&TRANSPARENT=true&SERVICE=WMS&REQUEST=GetMap&STYLES=&EXCEPTIONS =application%2Fvnd.ogc.se_inimage&SRS=EPSG%3A4326&BBOX=-153.599297,-105.3607 51,165.451558,97.517659&WIDTH=942&HEIGHT=599> &FORMAT=image%2Fpng&VERSION=1.1.1&TRANSPARENT=true&SERVICE=WMS&REQUEST=GetMa p&STYLES=&EXCEPTIONS=application%2Fvnd.ogc.se_inimage&SRS=EPSG%3A4326&BBOX=- 153.599297,-105.360751,165.451558,97.517659&WIDTH=942&HEIGHT=599 Arnd _____ Von: IT Intern [mailto:[email protected]] Gesendet: Dienstag, 21. Dezember 2010 23:19 An: Arnd Wippermann Betreff: Re: [OpenLayers-Users] Re: EPSG:4008 Layer Not Displaying Hi Arnd, thanks for your reply! Unfortunately that has not solved the problem for me :( I set the bounds both on my map and layer individually and still that layer does not display. I've also tried with the bounds I obtained from GeoServer, again no luck :-/ var borders = new OpenLayers.Layer.WMS( "Borders", "http://localhost:8080/geoserver/wms";, {id: 'borders', layers: 'cite:sedac', transparent: true, maxExtent: new OpenLayers.Bounds(-2880104.25, 2070327.125, -1038944.658, 3262434.769), projection: new OpenLayers.Projection('EPSG:4008'), units: 'm'}, {isBaseLayer: false, displayInLayerSwitcher: true, visibility: true, displayOutsideMaxExtent: true} ); I still don't see why it is not working ... Many Thanks, elshae On Tue, Dec 21, 2010 at 2:28 PM, Arnd Wippermann <[email protected]> wrote: Hi, I would think, that the maxExtent is the part to change. Your map projection is EPSG:4326 by default, and EPSG:4008 is also a projection in longlat. With your maxExtent the visible response of the WMS are only a pixel. Try a maxExtent of -180,-90,180,90. Perhaps it solves your problem. Arnd -----Ursprüngliche Nachricht----- Von: [email protected] [mailto:[email protected]] Im Auftrag von elshae Gesendet: Dienstag, 21. Dezember 2010 15:50 An: [email protected] Betreff: [OpenLayers-Users] Re: EPSG:4008 Layer Not Displaying Thank you so much for the kind support. I see that this is definitely going in the right direction, but I am still not able to get it working. In my body tag I have the scripts <script src="./OpenLayers-2.10/OpenLayers.js"></script> <script src="./proj4js/lib/proj4js-combined.js"></script> //I did also try proj4js.js, but the docs said use this one? Then I have these before my map and layer declaration, also in the body tag Ext.onReady(function() { Proj4js.defs["EPSG:4008"] = "+proj=longlat +ellps=clrk66 +no_defs"; Proj4js.defs["SR-ORG:6627"] = "+proj=merc +lon_0=0 +k=1 +x_0=0 +y_0=0 +ellps=WGS84 +datum=WGS84 +units=m +no_defs"; Proj4js.defs["EPSG:4326"] = "+proj=longlat +ellps=WGS84 +datum=WGS84 +no_defs"; ... ... //Map properties var options = { controls: [new OpenLayers.Control.Navigation()], //Needed to use GeoExt controls such as the zoomslider maxExtent: new OpenLayers.Bounds(-20037508.34, -20037508.34, 20037508.34, 20037508.34), units: 'm', allOverlays: false //Do not display all layers on load } var map = new OpenLayers.Map(options); var borders = new OpenLayers.Layer.WMS( "Borders", "http://localhost:8080/geoserver/wms";, {id: 'borders', layers: 'cite:sedac', transparent: true, projection: new OpenLayers.Projection("EPSG:4008")}, {isBaseLayer: false, displayInLayerSwitcher: true, visibility: true} ); Still nothing shows up :(. Am I doing something wrong? I'm not seeing the error... Thank you very much for your time, elshae -- View this message in context: http://osgeo-org.1803224.n2.nabble.com/EPSG-4008-Layer-Not-Displaying-tp5838 081p5855542.html Sent from the OpenLayers Users mailing list archive at Nabble.com. _______________________________________________ Users mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/openlayers-users
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