[Qgis-developer] Error in WCS

[Radim Blazek]

On Mon, Sep 30, 2013 at 8:14 AM, Paolo Cavallini <cavallini at faunalia.it> wrote:
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> Il 27/09/2013 12:33, Paolo Cavallini ha scritto:
>> Hi all.
>> Using one layer from
>> http://www.pcn.minambiente.it/PCNDYN/catalogowcs.jsp
>> e.g.
>>
>> http://wms.pcn.minambiente.it/wcs/dtm_20m
>>
>> I immediately get an error:
>>
>> WCS provider: Impossibile recuperare i dati di test.
>> Raster layer: Sorgente dati non valida (sorgente dati: wcs, URI:
>> identifier=EL.DTM.20M&url=http://wms.pcn.minambiente.it/wcs/dtm_20m
>
> - From the log I get:
> Cannot verify coverage full extent:
> Impossibile verificare la completa estensione della coverage:
> no data received.

Because the extent of data reported in capabilities by server are
sometimes wrong (bigger), the WCS provider verifies true extent by
requesting reported full extent but low resolution (10x10). If the
server does not have overviews, it can take very long time (server
side problem).

> The request seem to get a timeout, but it does not wait more than a couple of
> seconds, whereas in my settings the timeout is 60000.

Default cache mode is "Always Cache" it could be that you got timeout
the first time and the timeout response is cached.

Radim

> Any hint?
> Thanks.
> - --
> Paolo Cavallini - Faunalia
> www.faunalia.eu
> Full contact details at www.faunalia.eu/pc
> Nuovi corsi QGIS e PostGIS: http://www.faunalia.it/calendario
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