[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[netCDFJava #KWA-143788]: query related to point datasets and GEOS Projection


Can you send me a sample file that has your point data?  I'd like to see what 
you mean by netcdf java not picking up the data variables.

Thank you,

> Regarding point data, pretty straight forward example would be
> H.1 Point Data in CF 1.6 doc. But only change would be i will have three
> different data variables (in my case u and v components of winds from 3
> different channels) along with corresponding set of lat/lon/time variables.
> In current netcdf java we are not able to pick all the three set of data
> variables. It picks only one. This is prett much specific to point
> datasets. However in case of grids if I have 3 grids with three different
> sets of lat/lon(time if present not necessary) works very well.
> For second query just search GEOS satellite projection. we have support for
> this in cf as far as I remember. Which particular projection classes do
> this.
> Ghansham
> address@hidden> wrote:
> > Ghansham,
> >
> > If I understand your first query correctly, you have data from three
> sources that perhaps nearly, but don't quite, line up in space and time.
> It is certainly possible to assign dimenions lat1, lon1, lat2, lon2, lat3,
> lon3 in netCDF to describe the datasets.  Alternatively, if you are using
> netcdf4, you can use the same names (lat and lon) for dimensions in three
> different groups.  I'm not sure what you mean when you say that netcdf-java
> only picks up one of the datasets.
> >
> > The best answer on how to package your data is to suggest looking at it
> from the perspective of the end user or application, as ultimately, this is
> what matters most.  For instance, you could fudge the three dataset grids
> into an average and report only one lat/lon grid, or you could trust the
> end user to interpret the three grids appropriately.
> >
> > As to your second query, can you clarify what you need or are trying to
> do?
> >
> > Regards,
> >   Lansing Madry
> >   Unidata
> >   Boulder, Colorado
> >
> >
> >
> >> Sir,
> >>
> >>
> >> First query is related to point data...
> >>
> >> I have winds from three channels (VIS/IR/WV) which have three different
> >> sets of lat/lon.  I am trying to follow CF conventions. Is it possible
> >> to pack all the three sets of winds in one hdf/netcdf file and then read
> >> them using netcdf-java enhanced data model...  What I am seeing is that
> >> it picks only one of the datasets?  Or is it possible using CDM....
> >>
> >> Second query is related to GEOS Projection.
> >>
> >> Is there any class in ucar.unidata.geoloc.projection and corresponding
> >> class in ucar.nc2.dataset.transform. I think it is already in there in
> >> the CF conventions.
> >>
> >> I can try writing if it is not available.
> >>
> >> regards
> >> Ghansham
> >>
> >>
> >
> >
> > Ticket Details
> > ===================
> > Ticket ID: KWA-143788
> > Department: Support netCDF Java
> > Priority: Critical
> > Status: Open
> >
> >

Ticket Details
Ticket ID: KWA-143788
Department: Support netCDF Java
Priority: Critical
Status: Open

NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.