[mapguide-users] WFS FDO Ignores Filter When RestrictToBBox is True

[Crispin Hoult (TrueViewVisuals)]

Hi,

I documented this more at https://trac.osgeo.org/fdo/ticket/1009 but think that is fairly unmonitored and as it obviously affects MGOS4 I hope it can get some attention as affecting MapGuide issue.
As MGS is by it's nature as a web mapping viewer, it applies a BBox / Intersects query for every web map page request.
The issue is that if the new format RestrictToBBox = True is applied to the WFS query connection parameters then all property/aspatial filters are stripped/ignored when sent to the WFS server; resulting in an unexpected return of ALL data within the map window.

See sample MGP package attached, based on open British Geological Survey data. The attached screen grab shows the WebLayout preview highlighting in red Basalt lithography (use the WebLayout as it zooms/centres to a sensible scale and area).  The initial display used the connection format WITHOUT the BBox parameter.
If the other Filtered themed layer is turned on, even though it has a filter for lithology='Basalt', all data is returned.
It is the BBox parameter that results in unexpected results, even though filter and BBox are possible.

See FDO ticket for details or use Fiddler etc and apply proxy parameters to the WFS connection to capture web traffc.

 Best regards,

  Crispin

Crispin Hoult
Founder & CEO :: Linknode Ltd, trading as TrueViewVisuals



Tel: +44 141 374 2741<tel:+441413742741>
Web: TrueViewVisuals.com<https://trueviewvisuals.com/> and RoadsOnline.co.uk<https://www.roadsonline.co.uk/>

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