[mapserver-dev] WFS GetFeatures and BBOX problem

[Guillaume Sueur]

Hi Martin,

Your fix works like a charm.
Thanks a lot.

Guillaume

Le 16/07/13 22:40, Martin Kofahl a écrit :
> Guillaum,
> thanks for identifying the cause of this error. I would set tolerance to
> 0 right in msWFSGetFeature() before calling msQueryByRect(). Are you
> able to test https://github.com/mapserver/mapserver/pull/4709?
>
> Martin
>
>
> 2013/7/16 Guillaume Sueur <no-reply at neogeo-online.net
> <mailto:no-reply at neogeo-online.net>>
>
>     OK, got it.
>     It's only the TOLERANCE which is applied there.
>     But where it makes sense for WMS getFeatureInfo thing (where you
>     click on the map to retrieve surrounding features) it does not
>     really fit with WFS use case, where you want to retrieve all
>     features from a precise BBOX.
>
>     Could there be a way in mapquery.c not to apply the tolerance if the
>     request relies on WFS ?
>
>     Best regards
>
>     Le 16/07/13 11:58, Guillaume Sueur a écrit :
>
>         Hi list,
>
>         I'm experiencing a weird situation here.
>         I'm using a PostGIS Layer in WFS. If I send a getFeatures
>         request, the
>         requested BBOX is transformed when getting in Postgis.
>         Everything here (data, requests...) is in EPSG:4326.
>
>         For example : my WFS Request has
>         &BBOX=1,45,2,46
>         Postgis SQL Query is (as seen from MS DEBUG)
>         geom && ST_GeomFromText('POLYGON((-10.__2941176470588
>         33.7058823529412,-10.__2941176470588
>         57.2941176470588,13.__2941176470588
>         57.2941176470588,13.__2941176470588
>         33.7058823529412,-10.__2941176470588
>         33.7058823529412))',4326)
>
>         I don't understand why the BBOX gets modified, and by sooo much!
>         I have tested with MS 5, 6.0 and 6.2.1 : same results
>         I have tried to add precision to my BBOX : same results
>
>         When moving a single coordinate of the bbox, only one coordinate
>         of the
>         SQL is affected. Changing the previous BBOX to
>         &BBOX=1.5,45,2,46
>         gives for SQL :
>         ST_GeomFromText('POLYGON((-9.__79411764705882
>         33.7058823529412,-9.__79411764705882
>         57.2941176470588,13.__2941176470588
>         57.2941176470588,13.__2941176470588
>         33.7058823529412,-9.__79411764705882
>         33.7058823529412))',4326)
>
>         it shows that all coordinates but minx haven't changed. So I
>         don't think
>         it's something related to projection.
>
>         I have looked in various source code files, but I can't find the
>         place
>         where the BBOX is replaced by a RectObj, because I don't know if
>         this
>         kind of request relies to wfs, query, or whatever else.
>
>         Any clue would be appreciated
>
>         best regards
>
>         Guillaume Sueur
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