Re: IDV and NcML aggregation

• To: Rich Signell <rsignell@xxxxxxxx>
• Subject: Re: IDV and NcML aggregation
• From: Don Murray <dmurray@xxxxxxxxxxxxxxxx>
• Date: Fri, 16 Dec 2005 06:56:16 -0700

Hi Rich-

There are a couple of issues here:

- there was an error in your NcML, a corrected version is
attached.
- the corrected version turned up a bug in the nj22 library
which has been fixed
- the 1.3b1 version of IDV does not use the most recent
version of nj22 because there were changes made for that
release that we were unable to fully test before we
finalized 1.3b1

So, right now, NcML aggregation will not work in this
case with IDV 1.3b1.  When we get a version that works,
I'll let you know.

Don Murray


Rich Signell wrote:

IDV gang,

I tried using IDV with NcML for the first time, trying to aggregate two data sets along the time dimension (which is the actually called "ocean_time" in the netcdf file)

The data source comes up, but no Fields are displayed.

Here's my NcML:

http://stellwagen.er.usgs.gov/rps/share/test_agg.ncml

<?xml version="1.0" encoding="UTF-8"?>

<netcdf xmlns="http://www.ucar.edu/schemas/netcdf"; xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; xsi:schemaLocation="http://www.ucar.edu/schemas/netcdf http://www.unidata.ucar.edu/schemas/netcdfDataset2.xsd";>

<netcdf>
<aggregation dimName="ocean_time" type="joinExisting"/>

<netcdf uri="http://stellwagen.er.usgs.gov/adria/models/roms_sed/sed031/adria03_sed031_his_0014.nc"/> <netcdf uri="http://stellwagen.er.usgs.gov/adria/models/roms_sed/sed031/adria03_sed031_his_0015.nc"/>

</netcdf>
</netcdf>


My question:
Is this an IDV problem or a problem with how I formulated the NcML?

And could I have figured this out myself? (Is there a way to validate NcML?)

Thanks,

--
*************************************************************
Don Murray                               UCAR Unidata Program
dmurray@xxxxxxxxxxxxxxxx                        P.O. Box 3000
(303) 497-8628                              Boulder, CO 80307
http://www.unidata.ucar.edu/staff/donm
        "Time makes everyone interesting, even YOU!"
*************************************************************

<?xml version="1.0" encoding="UTF-8"?>
<netcdf xmlns="http://www.unidata.ucar.edu/namespaces/netcdf/ncml-2.2";>
<aggregation dimName="ocean_time" type="joinExisting"> 
<netcdf 
uri="http://stellwagen.er.usgs.gov/adria/models/roms_sed/sed031/adria03_sed031_his_0014.nc"/>
<netcdf 
uri="http://stellwagen.er.usgs.gov/adria/models/roms_sed/sed031/adria03_sed031_his_0015.nc"/>
</aggregation>
</netcdf>

• References:
  • IDV and NcML aggregation
    • From: Rich Signell