[OpenLayers-Users] spherical Mercator and google overlay

[Eric Lemoine]

Hi Andrea

If you use sphericalMercator and therefore the 900913 OpenLayers is
correct to use 900913 for the bbox coordinates.

Given that, if you know you have a feature in that bbox and if that
feature doesn't get displayed in the map, you definitely have a
problem, but that problem doesn't lie in the WFS/GetFeature request.

Maybe you could give us the GeoServer response (GML file) to check if
there's something wrong with that response.

PS: I would personally suspect something wrong in your GeoServer configuration.

Cheers,
--
Eric

On Feb 3, 2008 2:52 PM, Andrea Maschio <andrea.maschio at gmail.com> wrote:
> Hi, when building a Layer, there isn't a BBOX parameter in the options
> available. When I build a new WFS layer over a Google layer, I noticed
> that the http request string has a BBOX in srs 900913, which is
> correct because in geoserver my feature is in this srs.
>
> But, the problem is, geoserver seems not to manage properly the
> bouding box. I mean that if I pass manually the coordinates in the
> 4326 bounding box (BBOX=139,35,139.1,35.1) my feature is displayed
> correctly.
>
> I forgot to mention that this problem happens only when the
> sphericalMercator is set to 'true'. So, summing: i have google that
> overlays my layer in srs 4326. But unfortunately it has some little
> differences caused by the fact that google map isn't projected.
>
> When I import my feature in geoserver (who has been created in
> geoserver with srid=900913) i can see that GS tries to build a
> bounding box of 0.00012 and so which i noticed is 135 translated to
> 900913. Anyway the http request created by openlayers is
>
> ..wfs?typename=topp
> %3Akanagawa&SERVICE=WFS&VERSION=1.0.0&REQUEST=GetFeature&SRS=EPSG
> %3A900913
> &BBOX=15525210.003777895,4214737.6144324215,15544777.883015398,42343
>
>   which should be for proper visualization of the layer,
>
> .wfs?typename=topp
> %3Akanagawa&SERVICE=WFS&VERSION=1.0.0&REQUEST=GetFeature&SRS=EPSG
> %3A900913&BBOX=139,35,139.1,35.1
>
> I am not ashamed to say that I don't know very well projection and
> srid related issues, so if any could eventually link me to the point
> for understanding what I am doing wrong, it would be a lot helpful.
>
> Thanks
>
> --
> Andrea Maschio
> http://www.superandrew.it
>
>
>
>
>
>
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