[mapserver-users] Problem GetFeature with geom filter on WFS

Rahkonen Jukka Jukka.Rahkonen at mmmtike.fi
Mon Aug 29 09:22:41 EDT 2011


Hi,

Ok, understood. Do you have enough material now for filing a bug report? The desired behaviour would be to apply && filter for the first PostGIS query with the maximun extents of the geometry included in the filter of the WFS request, but without limit [maxFeatures]?

-Jukka Rahkonen-


Stéphane Brunner wrote:
> 
> Hello,
> 
> 2011/8/24 Rahkonen Jukka <Jukka.Rahkonen at mmmtike.fi>:
> > Hi,
> >
> > I am not too familiar with PostGIS, but isn't this && 
> exactly an index based
> > BBOX query which is checking if the BBOX of the feature is 
> intersecting with
> > the BBOX of the reference geometry?
> > where geom &&
> >> >> GeomFromText('POLYGON((620000 218000,620000 278000,690000
> >> >> 278000,690000 218000,620000 218000))',-1)
> This BBox is the Extents of the mapfile than in our case it 
> always return true.
> 
> >
> >  Then perhaps what you wrote
> > "MapServer filters them correctly but as we get
> >> only the 100 first results from the DB, we miss many objects and/or
> >> they are not related to the area where we want to apply a 
> geographical
> >> filter. "
> >
> > could better be written "as we get only the 100 first 
> results within the
> > BBOX filtered with fast but inaccurate index search, the 
> result set after
> > Mapserver applying a geographical filter may have less that 
> 100 features".
> Yes, but with a so large BBOX (extent from the mapfile, not geometry
> extent) in most cases it returns 0 results.
> 
> Sincerely
> Stéphane Brunner
> 
> >
> > -Jukka Rahkonen-
> >
> >
> > _______________________________________________
> > mapserver-users mailing list
> > mapserver-users at lists.osgeo.org
> > http://lists.osgeo.org/mailman/listinfo/mapserver-users
> >
> >
> 
> 
> 
> -- 
> camptocamp.com
> mapfish.org
> 


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