Fwd: [OpenLayers-Users] WFS reprojection on Google Maps

Thu May 5 05:04:04 EDT 2011

Hello again,

Today I tried an overlay of an WMS as this example shows:

http://openlayers.org/dev/examples/google-reproject.html

I added the following code:

var wms  = new OpenLayers.Layer.WMS(
                   "tasmania_state_boundaries - Untiled",
                   "http://localhost:8090/geoserver/wms",
                   {
                       layers: 'topp:tasmania_state_boundaries',
                       transparent: true,
                       srs: 'EPSG:4326'
                   },
                   {
                       isBaseLayer: false,
                       singleTile: true,
                       ratio: 1,
                       reproject: true
                   }
               );

This layer doesn't even show up in map. It seems that OpenLayers is
unable to do the reprojection. Does the WMS reprojection work in the
same as with the WFS reprojection?

Thank you,

Luís

2011/5/5 Luís de Sousa <luis.a.de.sousa at gmail.com>:
> Thank you Charles for the hint, but the result is exactly the same.
>
> As far as I understand the reprojection is performed by the WFS
> server, right? Could this be an issue server side?
>
> Thank you,
>
> Luís
>
> 2011/5/4 Charles Galpin <cgalpin at lhsw.com>:
>> Hi Luis
>>
>> I remember having trouble getting this right when I first started using openlayers. Once I figured it out, I kept using the same basic setup so I don't remember the details, but this is what I use for my map options. Perhaps give them a try.
>>
>> var options = {
>>                // the "community" epsg code for spherical mercator
>>                projection: "EPSG:900913",
>>                displayProjection: new OpenLayers.Projection("EPSG:4326"),
>>
>>                // map horizontal units are meters
>>                units: "m",
>>
>>                // this resolution displays the globe in one 256x256 pixel tile
>>                maxResolution: 78271.51695,
>>
>>                // these are the bounds of the globe in sperical mercator
>>                maxExtent: new OpenLayers.Bounds(-20037508, -20037508,
>>                                                 20037508, 20037508)
>>            };
>> hth
>> charles
>>
>> On May 4, 2011, at 5:51 AM, Luís de Sousa wrote:
>>
>>> Dear all,
>>>
>>> I've been trying to reproject WFS layers on Google Maps without
>>> success. After reading several threads here and elsewhere it became
>>> apparent that WFS 1.1.0 takes care of reprojections by itself, without any
>>> processing needed client side. Hence I tried simply to reproject the
>>> Tazmania shapes from Geoserver on a Google Maps base layer; while the
>>> WFS layers are indeed there, they do not seem to have been reprojected:
>>>
>>> http://www.flickr.com/photos/46630302@N04/5686739802/in/set-72157626519940667/
>>>
>>> Below goes the code, note that I'm using a local version of Geoserver
>>> on port 8090. I'd thank if anyone could hint at what I'm missing.
>>>
>>> Thanks,
>>>
>>> Luís
>>>
>>> -----
>>>
>>> <html xmlns="http://www.w3.org/1999/xhtml">
>>>   <head>
>>>       <style type="text/css">
>>>           #map {
>>>               width: 560px;
>>>               height: 460px;
>>>               border: 1px solid black;
>>>           }
>>>       </style>
>>>
>>>       <script src="http://localhost:8090/geoserver/www/OpenLayers-2.9/OpenLayers.js"
>>> type="text/javascript"></script>
>>>
>>>       <!-- Google API-->
>>>       <script src='http://maps.google.com/maps?file=api&amp;v=2&amp;key=ABQIAAAAjpkAC9ePGem0lIq5XcMiuhR_wWLPFku8Ix9i2SXYRVK3e45q1BQUd_beF8dtzKET_EteAjPdGDwqpQ'></script>
>>>
>>>       <script defer="defer" type="text/javascript">
>>>
>>>       function init(){
>>>
>>>           var map = new OpenLayers.Map("map", {
>>>               projection: new OpenLayers.Projection("EPSG:900913")
>>>           });
>>>
>>>           var gphy = new OpenLayers.Layer.Google(
>>>               "Google Physical",
>>>               {type: G_PHYSICAL_MAP}
>>>           );
>>>
>>>           var roads = new OpenLayers.Layer.WFS(
>>>               "Roads",
>>>               "http://localhost:8090/geoserver/wfs",
>>>               {typename: 'topp:tasmania_roads'},
>>>               {
>>>                   typename: 'tasmania_roads',
>>>                   featureNS: 'http://www.openplans.org/topp',
>>>                   extractAttributes: false,
>>>                   version: "1.1.0",
>>>                   srsName: "EPSG:900913"
>>>               }
>>>           );
>>>           roads.style = OpenLayers.Util.applyDefaults(
>>>               {strokeWidth: 2, strokeColor: "#ff0000"},
>>>               OpenLayers.Feature.Vector.style["default"]);
>>>
>>>           var states = new OpenLayers.Layer.WFS(
>>>               "States",
>>>               "http://localhost:8090/geoserver/wfs",
>>>               {typename: 'topp:tasmania_state_boundaries'},
>>>               {
>>>                   typename: 'tasmania_state_boundaries',
>>>                   featureNS: 'http://www.openplans.org/topp',
>>>                   extractAttributes: false,
>>>                   version: "1.1.0",
>>>                   srsName: "EPSG:900913"
>>>               }
>>>           );
>>>           states.style = OpenLayers.Util.applyDefaults(
>>>               {strokeWidth: 3, strokeColor: "#333333"},
>>>               OpenLayers.Feature.Vector.style["default"]);
>>>
>>>           map.addLayers([gphy, roads, states]);
>>>
>>>           map.addControl(new OpenLayers.Control.Navigation());
>>>           map.addControl(new OpenLayers.Control.LayerSwitcher());
>>>
>>>           map.setCenter(new OpenLayers.LonLat(147, -42), 7);
>>>
>>>       }
>>>       </script>
>>>
>>>   </head>
>>>   <body onload="init()">
>>>       <h5>This is a reprojection test on Google Maps.</h5>
>>>       <div id="map"> </div>
>>>   </body>
>>> </html>
>>> _______________________________________________
>>> Users mailing list
>>> Users at lists.osgeo.org
>>> http://lists.osgeo.org/mailman/listinfo/openlayers-users
>>
>>
>