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NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
Current content can be found at unidata.ucar.edu.
To learn about what's going on, see About the Archive Site.
Dear IDV users,
Our meteorologists make intensive use of IDV. NCEP GFS data is most,
served by a thredds data server via OpenDAP.
When selecting large data fields (e.g. for vertical soundings), it is
desirable to only select a sub-region of data to speed up loading
times. However, the screen where the data region is selected does not
allow the region to cross the 0-meridian. This is problematic when
forecasting for north west Europe.
To reproduce:
- select data source (NCEP global grib file)
- select variable (2 m temperature)
- select time steps in "Times" tab
- select spatial region in "Region" tab
The map shown in this region is (correctly) running from 0 to 360,
representing the grib file configuration. I cannot drag the region
past the 0 meridian.
Is there a way to work around this, other than re-writing the complete
set of grib files to encompass -180:180? We know how to do this
technically, but it's rather inpractical to re-grid gigabytes of data
every 6 hours just to deal with the 0 meridian ...
It would be great if IDV would allow drawing the region across the 0
meridian, effectively selecting a region from e.g. 340E:360E and from
0:20E, combining them into one. Any other workarounds are also much
appreciated!
Kind regards,
Hein Zelle
--
Dr. Hein Zelle
Advisor Meteorology & Oceanography
Tel: +31 (0)527-242299
Fax: +31 (0)527-242016
E-mail: hein.zelle@xxxxxxxxxxxxx
Website: www.bmtargoss.com
BMT ARGOSS b.v.
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services, goods or products supplied by BMT ARGOSS shall be subject
to and governed by BMT ARGOSS' own terms and conditions which are
available for inspection from BMT ARGOSS on request.
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