grads does not recognize undefineds in netcdf file

[Don Hooper]

Geert Jan van Oldenborgh,

I decided to print out the data value, _FillValue, and valid_max
in hex to see if the bit patterns were somehow different.  I was
surprised at how different the latter data values were.  Then I
saw what neither of us saw initially:  _FillValue and valid_max
lacked the traditional "f" trailing designation after the values,
indicating they were doubles, not floats.  When I remade your test
file with the trailing "f" characters on those two values, life was
good.  GrADS did recognize the latter data values as missing.

-Hoop

> From owner-gradsusr at LIST.CINECA.IT  Tue Aug  7 02:43:49 2007
> From: Geert Jan van Oldenborgh <oldenbor at KNMI.NL>
>
> Does anyone know why GrADS does not recognize the undefined value in the
> attacjed netcdf file (from the ECMWF data server)?  If I do a 'q
> ctlinfo' it is right there, and when I make a .ctl file with dset the
> netcdf file and an explicit undef 1.7e38 it works, but without that
> grads just plots 1.7e38 values.
>
> More importantly, does anybody have a workaround that does not involve
> xdfopen, so that the Climate Explorer (http://climexp.knmi.nl) can plot
> this kind of data?
>
> Greetings from rainy Holland,
>
>         Geert Jan van Oldenborgh
>
> --
> Geert Jan van Oldenborgh
> Global Climate Division
> Royal Dutch Meteorological Institute (KNMI)
> oldenborgh at knmi.nl          http://www.knmi.nl/~oldenbor
>
>
> --
> Geert Jan van Oldenborgh
> Global Climate Division
> Royal Dutch Meteorological Institute (KNMI)
> oldenborgh at knmi.nl          http://www.knmi.nl/~oldenbor