[Qgis-developer] WCS

[Marco Hugentobler]

Hi Radim

Nice to have a WCS client in QGIS!

If it goes via GDAL WCS driver, how does it work with Proxies (via 
libcurl?) Some poor users are sitting behind proxies, so it would be 
nice if the proxy settings from the options are applied to WCS client as 
well.

Regards,
Marco

Am 02.05.2012 12:23, schrieb Radim Blazek:
> Thanks to financial support from T4E s.r.l http://www.t4e.it/
> I could implement WCS support based on GDAL WCS driver.
>
> It is available here: https://github.com/blazek/Quantum-GIS branch wcs
>
> Because of WCS 1.1 bugs in GDAL (wrong axis order in bbox for latlong,
> no way to specify response CRS) and Mapserver (ignores  RangeSubset)
> we have to stick with WCS 1.0 but capabilities parser for 1.1 is
> ready.
>
> It was written with possible use of common base classes for W*S in
> mind: new classes QgsOWSConnection, QgsOWSSourceSelect.
>
> Open issues:
> - How to pass the raster to GDAL Tools. Currently the XML string is
> created on the fly by GDAL provider and passed as a string to
> GDALOpen, there is no XML file which could be given to GDAL Tools.
> - How to specify an extent and resolution in GDAL Tools.
> - How to implement save a copy of WCS part
>
> Related:
> I believe that it could be better to organize OWS by servers instead
> of by services, especially in the browser. Instead of adding a new
> connection for each service, user could add just one generic OWS
> connection and available services would appear under that connection
> in the tree. I have implemented this in OWS meta provider. It reads
> and combines all defined WMS, WFS and WCS connections and displays all
> available layers (if there are few) or  services under the connection:
> https://picasaweb.google.com/radim.blazek/OWS
>
> Radim
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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