[Qgis-developer] State of QGIS WFS provider

Jeremy Palmer JPalmer at linz.govt.nz
Thu Jan 31 13:17:17 PST 2013


Would also be great to be able to limit the functions and operators that are available in the expression dialog as well.

> -----Original Message-----
> From: Marco Hugentobler [mailto:marco.hugentobler at sourcepole.ch]
> Sent: Friday, 1 February 2013 9:52 a.m.
> To: Jeremy Palmer
> Subject: Re: State of QGIS WFS provider
>
> Hi Jeremy
>
> >Thanks for the comments. So I guess it's time to improve the
> current driver then.
>
> I'm glad you intend to work on the WFS provider (e.g. the
> filter sort model you mentioned would be a very usefull
> addition to the WFS dialog).
>
> >What I was referring to was the transformation from the QGIS query
> >expression to OGC XML filter which currently has >limitations
>
> That's true, there are certainly many things to improve here.
> One difficulty is that WFS does not standardize the filter
> function names.
> This problem might be easier to solve now that there is the
> possibility of declaring custom expression functions
> (http://woostuff.wordpress.com/2012/11/10/user-defined-express
> ion-functions-for-qgis/).
> Before that, it was somehow limited to the minimum default
> set of filter operations.
>
> cheers,
> Marco
>
>
>
> Am 31.01.2013 21:32, schrieb Jeremy Palmer:
> > Hi Marco,
> >
> > Thanks for the comments. So I guess it's time to improve
> the current driver then.
> >
> >> This is not a general limitation of the WFS provider.
> There is the possibility of writing the filter xml into the
> filter dialog as a string if needed. I know, it is not > very
> comfortable. But does the OGR driver come with a better GUI?
> > The OGR driver does not come with a better GUI. What I was
> referring to was the transformation from the QGIS query
> expression to OGC XML filter which currently has limitations.
> >
> > Cheers,
> > Jeremy
> >
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>
> --
> Dr. Marco Hugentobler
> Sourcepole -  Linux & Open Source Solutions Weberstrasse 5,
> CH-8004 Zürich, Switzerland marco.hugentobler at sourcepole.ch
> http://www.sourcepole.ch Technical Advisor QGIS Project
> Steering Committee
>
>

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