Hi Chris,
For some reason, the zlev coordinate variable is not being recognized as
a vertical coordinate axis. If I'm reading the CF spec correctly, the
zlev variable needs a "positive" attribute with value "up" (or "down")
or an "axis" attribute with the value "Z". I'm not able to test
GribDataset with those changes at the moment but you could try to wrap
the dataset with NcML that adds those attributes and see if that helps.
We'll have to look into improving those messages in parseInfo.
Ethan
Christopher Mueller wrote:
All,
I have an application which connects to OPeNDAP servers and allows the
user to subset the selected dataset and then retrieve a local copy of
the desired data. The application works well with most datasets that
are gridded – as long as the GridDataset contains GeoGrids. However
there are some datasets that don’t work for some reason, despite the
fact that they are DataType=Gridded.
Here is the url for one such dataset:
http://nomads.ncdc.noaa.gov:8085/thredds/dodsC/oceanwindsmon
The line I’m using to generate a GridDataset (from which GeoGrids are
obtained) is:
GridDataset gds =
(GridDataset)TypedDatasetFactory.open(thredds.catalog.DataType.GRID,
ncd, this, errlog);
Where ncd is the NetcdfDataset pointing to the OPeNDAP data and errlog
is a StringBuffer for recording any errors (of which there never are any).
The only information I can glean from stepping through my code comes
from the “parseInfo” field of the GridDataset. It is as follows (for
the dataset mentioned above):
"GridDataset look for GeoGrids
u(time, zlev, lat, lon) check CS zlev time lat lon: NOT complete
v(time, zlev, lat, lon) check CS zlev time lat lon: NOT complete
w(time, zlev, lat, lon) check CS zlev time lat lon: NOT complete
"
I’m hoping there’s another more “robust” method for generating a
GridDataset from a url as this is not the only dataset that this
occurs with, so a solution for this particular dataset isn’t of much use.
Any help/advice is most appreciated.
Thank you in advance,
Chris
--
*Christopher Mueller* | Scientist
Applied Science Associates
70 Dean Knauss Drive | Narragansett, RI 02882 USA
p: +1 401-789-6224 | f: +1 401-789-1932
e: cmueller@xxxxxxxxxxxxxx | www.asascience.com
*ASA **| Science. Services. Solutions
*
Imagination is everything. It is the preview of life's coming
attractions. - Albert Einstein
Whether you think you can or think you can't, either way you are
right. - Henry Ford
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Ethan R. Davis Telephone: (303) 497-8155
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