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

open each file seperately as a grid dataset, and make homogenous groups. build
an ncml on the fly, and open that as the aggregation.

> I want to be able to detect whether a submitted aggregation indeed
> points to data sets with homogenous sets of variables.  We are building
> an automated app, not an app wherein a human knows a priori what is in a
> proposed aggregation.
>
> I want to point to any semi-arbitrary set of NetCDF files as an
> aggregation, receive an aggregated GridDataset object, and somehow query
> that object to see if the aggregation is indeed valid.  In other words -
> I want to be able to do a "sanity check" on an aggregated GridDataset.
> Originally I was going to loop through the grids in the aggregated
> GridDataset and look to see if they are homogenous, but apparently that
> won't work.
>
> How would you suggest I perform a sanity check on an aggregated
> GridDataset?  The API doesn't seem to support "is this valid?" checks
> for such data sets.
>
> Thanks,
> Tom
> >> John,
> >>
> >> I can't replicate this problem with the <scan> element, but it is easily
> >> replicated with the <aggregation> element, using "joinExisting".  Point
> >> to a few NetCDF data sets with differing numbers/types of variables and
> >> you should see the problem.
> >>
> >
> > Im not sure i know what you mean by "data sets with differing numbers/types
of variables". A joinExisting has to have homogenous sets of variables. it
picks one to be a prototype for the aggregation. If the files differ, you will
get different result.
> >
> > is that the problem? what were you expecting to happen? perhaps you are
thinking of a "union" aggregation?
> >
> >
> >
> >
> >> Thanks,
> >> Tom
> >>
> >>> I just fixed a bug like that in FmrcSingle, but i havent seen it for
joinExisting. Are you sure its happening for joinExisting?
> >>>
> >>>
> >>>
> >>>> Hello again!
> >>>>
> >>>> Thanks for your help with the IOSP issue - the more I dig into Unidata's
> >>>> NetCDF Java API, the more I like it.
> >>>>
> >>>> I am using an NCML file to aggregate NetCDF files into a single
> >>>> GridDataset, and I see the following odd behavior:  a call to
> >>>> aggregatedGridDataset.getGrids() sometimes returns all the grids in the
> >>>> aggregate, and sometimes returns only some of these grids - apprarently,
> >>>> the grids in only one of the aggregate members.  This occurs when I use
> >>>> the <netcdf> element and when I use the <scan> element:
> >>>>
> >>>> <aggregation dimName="time" type="joinExisting">
> >>>> <netcdf location="/path/to/member_1.nc"/>
> >>>> <netcdf location="/path/to/member_2.nc"/>
> >>>> <netcdf location="/path/to/member_3.nc"/>
> >>>> <netcdf location="/path/to/member_4.nc"/>
> >>>> </aggregation>
> >>>>
> >>>> <aggregation dimName="time" type="joinExisting">
> >>>> <scan location="/path/to/members/directory" suffix=".nc"/>
> >>>> </aggregation>
> >>>>
> >>>> Any ideas why I am getting inconsistent results?
> >>>>
> >>>> Thanks,
> >>>> Tom
> >>>>
> >>>>
> >>>>
> >>>>
> >>> Ticket Details
> >>> ===================
> >>> Ticket ID: VSP-832015
> >>> Department: Support netCDF Java
> >>> Priority: Critical
> >>> Status: Open
> >>>
> >>>
> >>
> >
> >
> > Ticket Details
> > ===================
> > Ticket ID: VSP-832015
> > Department: Support netCDF Java
> > Priority: Critical
> > Status: Open
> >
>
>


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