Re: [thredds] Switch to TDS 4.5 on thredds.ucar.edu on June 16

• To: John Caron <caron@xxxxxxxx>
• Subject: Re: [thredds] Switch to TDS 4.5 on thredds.ucar.edu on June 16
• From: Heiko Klein <Heiko.Klein@xxxxxx>
• Date: Tue, 24 Jun 2014 19:39:50 +0200

Hi John,

Best regards,

Heiko

On 2014-06-24 19:09, John Caron wrote:

Hi Heiko:

The names of the time dimensions are arbitrary and you cannot count on
which variable uses which time dimension. Im surprised you were able to
assume constant name even in the 4.3 version.

You must use the coordinate variable that matches the dimension name
used by the variable, eg float timex(timex). You dont need the
netcdf-java coordinate system layer, that info is available in the
netcdf-C API and all languages that use it.

John


On Tue, Jun 24, 2014 at 7:46 AM, Heiko Klein <Heiko.Klein@xxxxxx
<mailto:Heiko.Klein@xxxxxx>> wrote:

    Hi,

    we're using the GFS data from
    
http://thredds.ucar.edu/__thredds/catalog/grib/NCEP/GFS/__Global_onedeg/catalog.html
    
<http://thredds.ucar.edu/thredds/catalog/grib/NCEP/GFS/Global_onedeg/catalog.html>

    We've been using it for several weeks now without problems, but the
    data from 20140624_00 got suddenly very strange, in particularly,
    the time-dimensions (time, time1, time2, time3) swapped, e.g.

    The time-dimension of u-component_of_wind_height___above_ground is
    0624_06: time2
    0624_00: time3
    0624_00 - threddsbackup.ucar.edu <http://threddsbackup.ucar.edu>: time


    Since we are using some programs which are not aware of
    coordinate-systems and don't detect time-dimensions automatically
    (i.e. they are not netcdf-java based), these files are very
    difficult for us to use. Is this a temporary problem on
    thredds.ucar.edu <http://thredds.ucar.edu> due to the upgrade, or
    will the names of the time-dimension swap arbitrary in the future?


    Best regards,

    Heiko Klein

    On 2014-06-13 17:57, John Caron wrote:

        As detailed in last weeks announcement, the TDS server at
        http://thredds.ucar.edu/__thredds/
        <http://thredds.ucar.edu/thredds/>  will be switching to use
        version 4.5
        on Monday, June 16.

        To help in the transition:

        1) The new "release candidate" server is currently running at
        http://threddsRC.ucar.edu/__thredds/
        <http://threddsRC.ucar.edu/thredds/>
        <http://threddsrc.ucar.edu/__thredds/
        <http://threddsrc.ucar.edu/thredds/>>.
        Please take the time to test it and give us feedback sooner than
        later.

        2) The 4.3 server will continue to be available at
        http://threddsBackup.ucar.edu/__thredds/
        <http://threddsBackup.ucar.edu/thredds/>
        <http://threddsbackup.ucar.__edu/thredds/
        <http://threddsbackup.ucar.edu/thredds/>> for at least a week
        after the
        switch, in case there are any mission critical issues that arise.

        3) IDV users can use a special plugin that will automatically remap
        their bundles for testing purposes; there is also a plugin to
        remap to
        the threddsBackup server if issues arise. Both plugins can be
        found in
        the IDV plugin manager under the "Data Sources" category. For
        information on how to use plugins in the IDV, please see
        
http://www.unidata.ucar.edu/__software/idv/docs/userguide/__misc/Plugins.html
        
<http://www.unidata.ucar.edu/software/idv/docs/userguide/misc/Plugins.html>

        4) If you have IDV bundles (.xidv) that you would like us to add
        to the
        IDV testing suite to help detect problems in the future, please
        submit
        at http://motherlode.ucar.edu/__repository/alias/TestMyBundle
        <http://motherlode.ucar.edu/repository/alias/TestMyBundle>


    --
    Dr. Heiko Klein                              Tel. + 47 22 96 32 58
    <tel:%2B%2047%2022%2096%2032%2058>
    Development Section / IT Department          Fax. + 47 22 69 63 55
    <tel:%2B%2047%2022%2069%2063%2055>
    Norwegian Meteorological Institute http://www.met.no
    P.O. Box 43 Blindern  0313 Oslo NORWAY

--
Dr. Heiko Klein                              Tel. + 47 22 96 32 58
Development Section / IT Department          Fax. + 47 22 69 63 55
Norwegian Meteorological Institute           http://www.met.no
P.O. Box 43 Blindern  0313 Oslo NORWAY

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    • From: John Caron

• References:
  • [thredds] Switch to TDS 4.5 on thredds.ucar.edu on June 16
    • From: John Caron
  • Re: [thredds] Switch to TDS 4.5 on thredds.ucar.edu on June 16
    • From: Heiko Klein
  • Re: [thredds] Switch to TDS 4.5 on thredds.ucar.edu on June 16
    • From: John Caron