On Thu, Jun 2, 2016 at 3:28 AM, Ben Caradoc-Davies <b...@transient.nz> wrote:
> On 01/06/16 20:12, Daniele Romagnoli wrote:
>
>> On Tue, May 31, 2016 at 11:06 PM, Ben Caradoc-Davies <b...@transient.nz>
>>
>>> - When using a custom dimension like sigma, should it be specified in the
>>> indexer.xml?
>>>
>> Yes. each domain/dimension involved in your mosaic should be declared.
>>
>>> - If an indexer dimension for sigma is required, what form should it
>>> take?
>>>
>> You should declare it in the <domains> section.
>> As an instance
>> <domains>
>> <domain name="sigma"> <!-- See Note1 -->
>> <attributes><attribute>sigma</attribute></attributes> <!-- See Note2
>> -->
>> </domain>
>> Note1: you can put any name you want here. It will represent the dimension
>> exposed in GeoServer.
>> Note2: the attribute here should match the real dimension name on the
>> underlying NetCDF dataset.
>>
>>> - Does sigma need an entry in the granule schema in indexer.xml?
>>>
>> Yes.
>> Your <coverage> should refer that sigma domain as well as include a column
>> in the schema
>> <coverage>
>> <name>u-component_of_wind_sigma</name>
>> <domains>
>> .... time?
>> <domain ref="sigma" />
>> </domains>
>> <schema name="u-component_of_wind_sigma" >
>> <attributes>.........., sigma: java.lang.Float</attributes> <!--
>> See Note 3 -->
>> </schema>
>> Note 3: the attribute in the schema should match the attribute of the
>> previously declared domain.
>>
>
> Thank you so much, Daniele. That works almost perfectly.
>
> The one problem is that Float is not supported, only times, Integer,
> Double, and String (and unsupported types like Float are treated as String
> and fail because String cannot be a coordinate variable type):
>
> https://github.com/geotools/geotools/blob/master/modules/plugin/coverage-multidim/netcdf/src/main/java/org/geotools/imageio/netcdf/utilities/NetCDFUtilities.java#L852
>
> Mmm... I should already have fixed that several months ago. I'll double
check it again.
> If I add a sigma domain as you described above and a schema attribute
> "sigma:Double", then enable both time and sigma in the Dimensions tab in
> the web UI, the coverage is returned with both time and sigma dimensions as
> expected. I also had to increase my heap to -Xmx2048m. I am now looking at
> a 647MB NetCDF-4 file with 4 time values and 50 sigma layers in Panoply.
> :-)
>
> Good news :-)
Cheers,
Daniele
> Thanks also for your other suggestions. I have not yet tried them.
>
>
> Kind regards,
>
> --
> Ben Caradoc-Davies <b...@transient.nz>
> Director
> Transient Software Limited <http://transient.nz/>
> New Zealand
>
--
==
GeoServer Professional Services from the experts! Visit
http://goo.gl/it488V for more information.
==
Ing. Daniele Romagnoli
Senior Software Engineer
GeoSolutions S.A.S.
Via di Montramito 3/A
55054 Massarosa (LU)
Italy
phone: +39 0584 962313
fax: +39 0584 1660272
http://www.geo-solutions.it
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