[OpenLayers-Users] Problem to display a WFS layer with
OpenLayers.Layer.Vector()
gbrun
gbrun at myopera.com
Fri Jul 15 06:05:54 EDT 2011
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
>
>
>
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