On Thu, Sep 29, 2011 at 10:37 AM, quan huynh <[email protected]> wrote:
> Hi all,
>
> After trouble shooting the issue with ESRI (ArcGIS), it turned out
> that ArcGIS was tested using an older version of geoserver (GeoServer
> 1.7.2.). The describe coverage query string does not contain identifier.
> Here is the whole URL:
>
>
> http://apps.who.int/tools/geoserver/ows?REQUEST=DescribeCoverage&SERVICE=WCS&VERSION=1.0.0
>
> This was O.K. with 1.7.2. It returns the description of all coverages.
> In the latest stable Geoserver release, without specifying the identifier
> MissingParameterValue exception was returned.
>
> Does any one know if this change is intentional, and the rationale
> behind it?
>
I can't comment on wheter the change is intentional, but it's a valid one.
The WCS 1.0 specification says:
If the Coverage element is absent, the server may return full descriptions
of every coverage offering
available, or return a service exception
GeoServer goes for the second option, which is a valid one, a compliant
client should be able
to support this case too.
That said, changing the code to support also the lack of said parameter
should not be too hard.
This of course does not mean that will magically make ArcGis work, the next
step is ArcGis
understanding the response and performing a GetCoverage request that
GeoServer understands,
if the ArcGis client has not been written considering all the possible cases
in the spec
there might be more failures ahead (and GeoServer could have its own bugs
there too).
Cheers
Andrea
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Ing. Andrea Aime
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