Hi Alessandro
>Since OGC FILTER parsing is already implemented in QGIS, would it be
possible make the WMS understand OGG FILTER encoding in addition to the
custom syntax?
The problem is that the filter has the subset syntax of the data
provider. So it would need translation OGC syntax -> provider syntax (or
the possibility to choose between db server side filtering or QGIS side
filtering with unified syntax).
Regards,
Marco
On 09.01.2014 15:13, Alessandro Pasotti wrote:
Hi,
I'm trying to build an improved legend for QWC as explained in my
previous email.
The idea was to create an helper script (like those already existing
for search) that returns json data and base64-encoded images to allow
building of the legend on the client. The script currently query
GetStyles to get the classes and get the image for each RULE with
GetLegendGraphic, so far so good.
The legend is then cached on the file system for speed.
The important missing point is that I would be able to build an
interactive legend, so that the user can for example click on
individual classes and change visibility or maybe highlight or zoom to
extent, this is why I need FILTERS.
The work is almost done, but I've come to a stop with filter
generation. I can easily obtain ogc filters for each rule (they are in
the SLD) but it seems like the FILTER parameter in QGIS mapserver WMS
follows its own syntax.
The only option I see now is to convert OGC FILTER to the custom QGIS
FILTER syntax. This is easy for simpler rules but can become difficult
when rules have complex conditions.
Any idea or suggestion ?
Since OGC FILTER parsing is already implemented in QGIS, would it be
possible make the WMS understand OGG FILTER encoding in addition to
the custom syntax?
--
Alessandro Pasotti
w3: www.itopen.it <http://www.itopen.it>
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--
Dr. Marco Hugentobler
Sourcepole - Linux & Open Source Solutions
Weberstrasse 5, CH-8004 Zürich, Switzerland
marco.hugentob...@sourcepole.ch http://www.sourcepole.ch
Technical Advisor QGIS Project Steering Committee
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