Due to the current gap in continued funding from the U.S. National Science Foundation (NSF), the NSF Unidata Program Center has temporarily paused most operations. See NSF Unidata Pause in Most Operations for details.
Due to the current gap in continued funding from the U.S. National Science Foundation (NSF), the NSF Unidata Program Center has temporarily paused most operations. See NSF Unidata Pause in Most Operations for details.
Don On 4/22/20 1:17 PM, Antonio S. Cofiño wrote:
Hi Don, On 4/22/20 5:24 PM, Don Murray via netcdf-java wrote:Hi All-I'm looking at storing forecast model data (NMME and GEFS) in netCDF format and am wondering if anyone out there is doing that and using netcdf-java to access and subset.Yes. You can take a look at: https://meteo.unican.es/trac/wiki/udg/ecoms/dataserver/catalogIn particular System4, CFSv2 and glosea5 datasets which corresponds to different seasonal forecasts systems.For GRIB data, netcdf-java/THREDDS uses a 2D time dimension with dimensions (reftime, time, ens, lat, lon) where time is stored as time(reftime, time). I'm looking for examples that use netCDF as the storage format, particularly if they are served up via THREDDS. I'm using the ucar.nc2.dt.grid classes to read netCDF files at the present.In particular we are using netcdf-java for accessing data from client side and TDS from server side to aggregate data in common datasets.In the attached files you can find the opendap info for on of the datasets which includes "realization" coordinate and 2D time, among level, lat and lon coordinates (level it's a particular case).https://www.unidata.ucar.edu/software/netcdf-java/v4.3/v4.2/javadocAll/ucar/nc2/ft/grid/Grid.html#makeSubset(ucar.ma2.Range,%20ucar.ma2.Range,%20ucar.ma2.Range,%20ucar.ma2.Range,%20ucar.ma2.Range,%20ucar.ma2.Range)The client use de makeSubset method from the Grid object which allows to subset along the realization coordinate and 2D time:https://www.unidata.ucar.edu/software/netcdf-java/v4.3/v4.2/javadocAll/ucar/nc2/ft/grid/Grid.htmlThe dataset are the original GRIB1 files aggregated using netcdf-java ncml aggregation and published it by TDS.This is been used from a different R packages we developed, but in particular the central part it's the loadeR which interacts directly with the netcdf-java API (by rJava):https://github.com/SantanderMetGroup/loadeR You have some academic reference and use cases there. Please, let me know if you need more info. Regards Antonio -- Antonio S. Cofiño Dep. de Matemática Aplicada y Ciencias de la Computación Universidad de Cantabria http://www.meteo.unican.es _______________________________________________ NOTE: All exchanges posted to Unidata maintained email lists are recorded in the Unidata inquiry tracking system and made publicly available through the web. Users who post to any of the lists we maintain are reminded to remove any personal information that they do not want to be made public. netcdf-java mailing list netcdf-java@xxxxxxxxxxxxxxxx For list information or to unsubscribe, visit: https://www.unidata.ucar.edu/mailing_lists/
-- Don Murray NOAA/PSL and CU-CIRES 303-497-3596 https://www.psl.noaa.gov/people/don.murray/
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