[OpenLayers-Users] Vector Layer, WFS Protocol and BBOX strategy problem

[Andreas Hocevar]

Hi,

do you have proj4js.js included in your html page? See
http://trac.openlayers.org/wiki/Documentation/Dev/proj4js

OpenLayers out of the box can only transform between EPSG:4326 and EPSG:900913.

Regards,
Andreas.

On 11/10/09, Pedro Baracho <pedropbaracho at gmail.com> wrote:
> Thanks for the reply.
>
> I changed to 1.1.0, but I am still having problems with projections.
>
> The BBOX filter of the request is being built with weird numbers on it:
>
> <ogc:BBOX><ogc:PropertyName>GEOLOC</ogc:PropertyName><gml:Envelope
> xmlns:gml="http://www.opengis.net/gml"
> srsName="EPSG:29193"><gml:lowerCorner>-4987936.2379319
> -2307634.0730985</gml:lowerCorner><gml:upperCorner>-4797149.4153663
> -2213769.4023813</gml:upperCorner></gml:Envelope></ogc:BBOX>
>
> Those numbers don't make any sense in EPSG:29193 (
> http://spatialreference.org/ref/epsg/29193/)
> The bounds should be limited to: 166020.2387, 7087605.5418, 833979.7613,
> 10000000.0000, and I am seeing some negative numbers.
>
> I also changed the displayProjection on the map to EPSG:29193 and those
> weird numbers are confirmed by OpenLayers.Control.MousePosition.
>
> My guess is that there is some problem with the reprojection routine from
> 900913 to 29193. I am also guessing this may be because 29193 is limited to
> a region of the globe while 900913 is a world-wide projection. Does it make
> sense? I don't know much about cartography and projections and I didn't dig
> in OpenLayers code yet.
>
> Do you have any other hint for me?
>
> On Mon, Nov 9, 2009 at 6:40 PM, Andreas Hocevar <ahocevar at opengeo.org>wrote:
>
>> Hi,
>>
>> WFS 1.0.0 does not support on-the-fly reprojection. You have to use WFS
>> 1.1.0, which is e.g. supported by GeoServer. And you have to specify the
>> version on the protocol:
>>
>> Pedro Baracho wrote:
>> > var layer = new OpenLayers.Layer.Vector("WFS", {
>> >                     strategies: [new OpenLayers.Strategy.BBOX(),
>> > saveStrategy],
>> >                     protocol: new OpenLayers.Protocol.WFS({
>>                             version: "1.1.0",
>> >                         url:  "http://localhost:8080/geoserver/wfs",
>> >                         featureType: "Regional",
>> >                         featureNS: "http://prodabel1062.pbh:8080/avis",
>> >                         geometryName: "GEOLOC",
>> >                         srsName: "EPSG:29193"
>> >                     }),
>> >                     projection: new OpenLayers.Projection("EPSG:29193")
>> >             });
>> >
>>
>>
>> Regards,
>> Andreas.
>>
>> --
>> Andreas Hocevar
>> OpenGeo - http://opengeo.org/
>> Expert service straight from the developers.
>>
>>
>


-- 
Andreas Hocevar
OpenGeo - http://opengeo.org/
Expert service straight from the developers.