Thanks, Don. I didn't look closely enough at the URL to see it was a
fileServer URL and not an OPeNDAP URL.
Roland
On Wed, Nov 6, 2013 at 10:28 AM, Don Murray <don.murray@xxxxxxxx> wrote:
> Hi Roland-
>
> Another way you can define the ensemble dimension (in addition to/instead
> of) is to use the CDM's _CoordinateAxisType attribute
>
> _CoordinateAxisType: "Ensemble";
>
> Less CF'y, but guaranteed to work. ;-)
>
> I thought I had an NcML example, but I don't. Antonio's is pretty complex:
>
> http://www.meteo.unican.es/thredds/fileServer/WRFUC/
> 2013110412/oper_gfs_mgrama_2013110412_d02.ncml
>
> Your's will depend on the structure of your files. The simplest is to
> have 1 variable/1 ensemble per file.
>
> Don
>
>
> On 11/6/13 8:48 AM, Roland Schweitzer - NOAA Affiliate wrote:
>
>> Cofiño and Don,
>>
>> Thanks much for the input and the examples. This is extremely helpful.
>> It will take me a while to experiment with the examples and understand
>> the implications for what we are trying to accomplish.
>>
>> In particular, I'm going to use the examples to try to build my own
>> ensembles from separate files using NCML. Cofiño, if you can share a
>> bit of your NCML that would be a great.
>>
>> Thanks. I'll try to remember to report back anything I learn with my
>> experiments that might be useful.
>>
>> Roland
>>
>>
>> On Wed, Nov 6, 2013 at 9:24 AM, Don Murray (NOAA Affiliate)
>> <don.murray@xxxxxxxx <mailto:don.murray@xxxxxxxx>> wrote:
>>
>> All-
>>
>> This provides an example of the different ways that an ensemble
>> dimension can be used and that the CDM can handle. For Antonio's
>> example, the dimension ordering is:
>>
>> float tas(ensemble=5, time1=121, height=1, lat=126, lon=201);
>> :_CoordinateAxes = "ensemble time1 height lat lon ";
>> :standard_name = "air_temperature";
>> :long_name = "Surface air temperature";
>> :units = "Celsius";
>>
>> with ensemble as the leftmost dimension
>>
>> In the ensemble files I generate, they are:
>>
>> float Total_precipitation(time=1, ens=11, lat=27, lon=51);
>> :_FillValue = 9999.0f; // float
>> :units = "kg m-2";
>> :long_name = "Total_precipitation___Accumulation
>>
>> (Accumulation for Mixed Intervals) @ surface";
>>
>> I put time in the leftmost dimension.
>>
>> The nice thing is that the CDM does not care! You can structure it
>> according to your needs.
>>
>> Don
>>
>>
>> On 11/5/13 12:59 PM, Cofiño Gonzalez, Antonio Santiago wrote:
>>
>> Roland,
>>
>> This is an example with Ensemble coordinate axis
>>
>> http://www.meteo.unican.es/__thredds/catalog/WRFUC/__
>> 2013110412/catalog.html?__dataset=OPERWRF12DatasetScan/_
>> _2013110412/oper_gfs_mgrama___2013110412_d02.ncml
>>
>> <http://www.meteo.unican.es/thredds/catalog/WRFUC/
>> 2013110412/catalog.html?dataset=OPERWRF12DatasetScan/
>> 2013110412/oper_gfs_mgrama_2013110412_d02.ncml>
>>
>> Antonio S. Cofiño
>> Santander Meteorology Group
>> University of Cantabria
>>
>>
>>
>> El 05/11/2013, a las 16:45, "Roland Schweitzer - NOAA Affiliate"
>> <roland.schweitzer@xxxxxxxx <mailto:roland.schweitzer@xxxxxxxx>
>> <mailto:roland.schweitzer@__noaa.gov
>>
>> <mailto:roland.schweitzer@xxxxxxxx>>> escribió:
>>
>> Hi,
>>
>> I see hints in the Java netCDF API that it can understand a
>> grid that
>> has an ensemble axis. What's not clear to me is how one
>> constructs a
>> netCDF data source (either in the file or via some sort of TDS
>> aggregation) that represents the ensemble. The CF conventions
>> document doesn't seem say anything about ensembles.
>>
>> Google is failing me, can anybody offer some examples or
>> documentation
>> links for data sources with an ensemble axis?
>>
>> Thanks,
>> Roland
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>> --
>> Don Murray
>> NOAA/ESRL/PSD and CU-CIRES
>> 303-497-3596 <tel:303-497-3596>
>> http://www.esrl.noaa.gov/psd/__people/don.murray/
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> Don Murray
> NOAA/ESRL/PSD and CIRES
> 303-497-3596
> http://www.esrl.noaa.gov/psd/people/don.murray/
>
