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[netCDFJava #VSP-832015]: ncdf4: filling empty object with data?

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  • Subject: [netCDFJava #VSP-832015]: ncdf4: filling empty object with data?
  • Date: Tue, 07 Apr 2009 14:34:54 -0600
An IOSP is for creating a NetcdfFile object, populating it, and satisfying the 
read requests. You have to do all that. If you are pulling the data from 
somewhere other than a RandomAccessFile, you can pass in a null 
RandomAccessFile. So im thinking thats the best way to do it.

> Thanks, John.  It looks like IOSPs are for *reading files*.  I want to
> write data to an empty Object, not read from or write to a file.  In
> fact, I want to be able to create an GeoGrid from scratch without any
> file I/O.  Am I misunderstanding you?
> 
> Thanks,
> Tom
> > Hi Tom:
> >
> > Typically you have to create an IOSP for this kind of thing. See Section 4 
> > of:
> >
> >   http://www.unidata.ucar.edu/software/netcdf-java/tutorial/index.html
> >
> > If you know what you are doing, you can create the Dimensions, Variables, 
> > Attributes, etc. Data values must be stored in memory with 
> > Variable.setCache(). We dont have any docs for this "on-the-fly" creation, 
> > so i would recommend implementing an IOSP, which will be easier in the long 
> > run.
> >
> >
> >
> >> Hi John,
> >>
> >> I am looping through data; I want to create an empty ncdf4-compliant
> >> object and fill it with this data (defining Dimensions, Variables,
> >> Attributes, values...).  I am *not* asking about writing a file to disk;
> >> I am asking about creating/populating an object in memory.  For writing
> >> to disk, other resources/APIs will be used (e.g. the Lincoln Labs JNI
> >> for this purpose).
> >>
> >> The *NetcdfFileWriteable *object does this for ncdf3.  I don't see any
> >> way, in the Java API, to do so for ncdf4.  Can you tell me how I can
> >> loop through data in memory and populate a ncdf4-compliant object -
> >> perhaps a GeoGrid, or a GridDataset, or something?
> >>
> >> Thanks,
> >> Tom
> >>
> >>
> >>
> >
> >
> > Ticket Details
> > ===================
> > Ticket ID: VSP-832015
> > Department: Support netCDF Java
> > Priority: Critical
> > Status: Closed
> >
> 
> 


Ticket Details
===================
Ticket ID: VSP-832015
Department: Support netCDF Java
Priority: Critical
Status: Open