[mapserver-dev] Re: problem with WFS DWithin

[Bart van den Eijnden (OSGIS)]

Okay, it seems it only returns features if they are totally contained within
the searchshape + distance (the buffered linestring).

Is this the way DWithin is supposed to behave? I am not a geometry operator
specialist unfortunately, but my expectation was to get any of the polygons
containing the buffered linestring.

A small buffer (500 m) selects nothing:
http://www.osgis.nl/download/umn/dwithin1.png

A bigger buffer (2500 m) only selects 3 polygons:
http://www.osgis.nl/download/umn/dwithin2.png

Best regards,
Bart

--
Bart van den Eijnden
OSGIS, Open Source GIS
http://www.osgis.nl


--------- Oorspronkelijk bericht --------
Van: Bart van den Eijnden OSGIS <bartvde at osgis.nl>
Naar: mapserver-dev at lists.osgeo.org <mapserver-dev at lists.osgeo.org>
Onderwerp: problem with WFS DWithin
Datum: 27/03/08 14:59

> 
> Hi list,
> 
> I can't get a DWithin filter containing a LineString to work. I am using a
> polygon layer. It doesn't select anything. Using 5.0.2.
> 
> A DWithin containing a Polygon works fine.
> 
> Any ideas what could be causing this?
> 
> Did anybody else experience the same thing?
> 
> Best regards,
> Bart
> 
> --
> Bart van den Eijnden
> OSGIS, Open Source GIS
> http://www.osgis.nl
> 
> 
> 
>