Hi Hein:
What you are seeing is the limitations of aggregations. In this case, there are
3 different time coordinates in the collection, but NcML aggregation can only
aggregate on one of them.
You want to use feature collections instead. Replace your entire <dataset>
element with something like:
<featureCollection name="myCollectionName" featureType="GRIB"
path="grib/NCEP/GFS/etc">
<collection
spec="/pub/data/nccf/com/gfs/prod/gfs.2013060600/gfs\.t00z\.pgrb2f..$"
dateFormatMark="#prod/gfs.#yyyyMMddHH" />
</featureCollection>
you have to get the regexp right to pick out the files you need (rather than
just enumerate them as in ncml):
spec="/pub/data/nccf/com/gfs/prod/gfs.2013060600/gfs\.t00z\.pgrb2f..$
means all the files starting with
"/pub/data/nccf/com/gfs/prod/gfs.2013060600/gfs.t00z.pgrb2f"
and then the last two chars can be anything "..$"
Usually need to get a $ terminator in order to exclude the gbx9 and ncx index
files.
See
http://www.unidata.ucar.edu/projects/THREDDS/tech/tds4.3/reference/collections/FeatureCollections.html
for more details.
John
On 6/6/2013 3:30 AM, Hein Zelle wrote:
> Dear John,
>
> attached to this email is a complete ncml file that we place next to
> the data files. The data files themselves are too big to upload, but
> they are standard gfs grib2 files, you can find them at
>
> ftp://ftpprd.ncep.noaa.gov/pub/data/nccf/com/gfs/prod/gfs.2013060600
>
> (that's for this morning, modify the date as needed)
> The files are the grib2 files at 0.5 degree, e.g. gfs.t00z.pgrb2bf30
> (50 mb each).
>
> The previous snippet of ncml I sent should also work, you'll have to modify
> the paths to the correct folder of course. A variable to check is for
> example
>
> Total_precipitation_surface_3_Hour_Accumulation
>
> These should have multiple time steps, but I get only 1 time step (the
> first, for the +03 forecast). The +00 analysis doesn't contain the
> precipitation fields. Any variable with an accumulation or averaging
> interval exhibits the problem.
>
>
> Kind regards,
> Hein Zelle
>
>
>
>
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