[OpenLayers-Users] Problem to display a WFS layer with OpenLayers.Layer.Vector()

[gbrun]

So, for people who will come across the same problem, this is the way I  
solve it:

When you use the OpenLayers.Layer.Vector() method, you must specify the  
readFormat in the OpenLayers.Protocol.WFS() method, like this:

protocol: new OpenLayers.Protocol.WFS(
	{
	srsName: "EPSG:2154"
	,url: "http://192.168.168.199:81/geoserver/wfs"
	,featureNS :  "http://127.0.0.1:8080/wfs"
	,featureType: "unit_pay"
	,readFormat: new OpenLayers.Format.GML()
	}
);

For GeoJSON, you must also specify the outputFormat like this:
	,outputFormat: "json"
	,readFormat: new OpenLayers.Format.GeoJSON()

And finally, an other problem that I met: the map projection. Your  
features must be projected in the same projection as your map projection.  
Otherwise, your features will not be displayed.

Hope it will help :)

Geoffrey


On Wed, 13 Jul 2011 10:27:21 +0200, gbrun <gbrun at myopera.com> wrote:

> Hi!
>
> I have a quite incomprehensible error!
>
> I try to display a WFS layer from GeoServer.
>
> I tried two different ways by using Openlayers.Layer.WFS() and then  
> OpenLayers.Layer.Vector(). Only the first one works. This one uses a GET  
> protocol, and the second one a POST protocol (according to firebug).
>
> What is really curious is that, even if no features are displayed in the  
> second case, the XML returned mentions no errors and lists the required  
> features. But when I look at my WFS layer variable in firebug, the  
> property "feature" is empty!
>
> Above are my two codes:
>
> var up_wfs = new OpenLayers.Layer.WFS(
> 	"Unités paysagères en WFS",
> 	"http://192.168.168.199:81/geoserver/wfs",
> 	{typename:'unit_pay'}
> );
>
>
> var up_vector = new OpenLayers.Layer.Vector(
> 	"Unités paysagères en vector",
> 	{strategies: [new OpenLayers.Strategy.Fixed()],
> 	 protocol: new OpenLayers.Protocol.WFS(
> 		{
> 		srsName: "EPSG:2154"
> 		,url: "http://192.168.168.199:81/geoserver/wfs"
> 		,featureNS :  "http://127.0.0.1:8080/wfs"
> 		,featureType: "unit_pay"
> 		}
> 	)}
> );
>
> Has someone any clue?
>
> Geoffrey
>
>
>


-- 
Using Opera's revolutionary email client: http://www.opera.com/mail/