Ghansham, In theory, your suggestion should work. In practice, we will see how well the CDM handles a non-georeferencing coordinate axis. We will be pleased to have a sample file when you have it assembled. Regards, Lansing Madry Unidata Boulder, Colorado On 8/13/2013 8:17 PM, ghansham sangar wrote: > New Client Reply: variable aggregation within a single dataset > > Ok fine... let me give a try. It will be a great one if it works. > Getting into more details, we have a geostationary sounder with radiance > coming from as many as 18 IR channels. > So I want to stack them with in a single file with radiance central > wavelength as the dimension (where I will try to use > the discrete axis concept.) Lets see if it works. > If I use that then it should work with NetCDF-Java. (I mean does NCJ has > support for discrete axis built in?) > > Ghansham > > > address@hidden> wrote: > >> Ghansham, >> >> I do not have a sample dataset with a discrete axis that I can think of >> offhand. If you were to create a new dimension (axis) for aggregation >> using NcML, you would do it as described here: >> >> >> http://www.unidata.ucar.edu/software/netcdf/ncml/v2.2/Aggregation.html#joinNew >> >> Note that you would not be able to do this inside of a single dataset, per >> your original question. >> >> Regards, >> Lansing >> >>> Can you attach a sample datset or how discrete axis looks in ncml or >> cdl? >>> Ghansham >>> >>> address@hidden> wrote: >>>> Ghansham, >>>> >>>> As near as I might suggest, your wave number axis would probably fall >>> under the description of a "discrete axis." There is a discussion in the >>> most recent CF document here: >>>> >> http://cf-pcmdi.llnl.gov/documents/cf-conventions/1.6/cf-conventions.html#discrete-axis >>>> Regards, >>>> Lansing >>>> >>>>> Actually I dont want to go away from CF conventions. AFAIK wavenumber >> has >>>>> not been yet accepted as a standard dimension. If I am wrong in >> stating >>>>> that just let me know and I will go ahead to do that. I am more than >>> happy >>>>> doing that. It reduces the number of variable in my file. >>>>> >>>>> regards >>>>> Ghansham >>>>> >>>>> >>>>> address@hidden> wrote: >>>>> >>>>>> Ghansham, >>>>>> >>>>>> I'm afraid that you will not be able to aggregate your variables as >> you >>>>>> are describing using NcML or any of our aggregation tools. Your >> best >>>>>> solution is probably to rewrite the files with the wavenumber >> dimension >>>>>> included from the start. >>>>>> >>>>>> Regards, >>>>>> Lansing Madry >>>>>> Unidata >>>>>> Boulder, Colorado >>>>>> >>>>>>> R/Sir >>>>>>> >>>>>>> I have mulitple variables (3-d namely time, lat, lon) within a >> single >>>>>>> dataset, and I want to join them on fourth dimension wavenumber >> (to >>> be >>>>>>> created in the dataset). Is it possible using NcML or any other >>> solution >>>>>>> >>>>>>> Ghansham >>>>>>> >>>>>>> >>>>>> >>>>>> Ticket Details >>>>>> =================== >>>>>> Ticket ID: YHY-505756 >>>>>> Department: Support netCDF Java >>>>>> Priority: Critical >>>>>> Status: Open >>>>>> >>>>>> >>>>> >>>> >>>> Ticket Details >>>> =================== >>>> Ticket ID: YHY-505756 >>>> Department: Support netCDF Java >>>> Priority: Critical >>>> Status: Open >>>> >>>> >>> >> >> Ticket Details >> =================== >> Ticket ID: YHY-505756 >> Department: Support netCDF Java >> Priority: Critical >> Status: Open >> >> > > > Ticket Details > =================== > Ticket ID: YHY-505756 > Department: Support netCDF Java > Priority: Critical > Status: Open > Link: > https://www.unidata.ucar.edu/esupport/staff/index.php?_m=tickets&_a=viewticket&ticketid=22278 Ticket Details =================== Ticket ID: YHY-505756 Department: Support netCDF Java Priority: Critical Status: Open
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