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[netCDFJava #JOH-194711]: Info about soil type variable in grib1 files

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  • Subject: [netCDFJava #JOH-194711]: Info about soil type variable in grib1 files
  • Date: Wed, 31 Jan 2018 10:25:18 -0700
Greetings again, Alessio,

It looks like, yes, they have overridden the WMO tables. The parameter you are 
likely looking for is:

'soiltyp'
table2Version = 202 ;
indicatorOfParameter = 57 ;
indicatorOfTypeOfLevel = 1 ;

In the WMO tables, this is called 

Evaporation
units=kg m^-2

So, in netCDF-Java, the variable you are looking for will be named 
"Evaporation_surface". It also has an attribute that more clearly identifies 
what it is:

Grib_Variable_Id = "VAR_80-255-202-57_L1"

Oh, the joys of GRIB.

Again, there is no way to know 100% if this is correct unless you have the 
actual table used when the program wrote out the GRIB1 file, but this is 
probably as good as it gets without it.

Sean

> Greetings Alessio,
> 
> I do not see any variables that indicate soil type, but that does not mean 
> the values are not in the file. Because this is a grib1 file, you do not 
> actually know what is in it unless you have the exact grib table that was 
> used to write the file; netCDF-Java assumes the WMO tables were used, but 
> often times people override the WMO tables because they cannot find their 
> variable in them. From where did you obtain this file?
> 
> Cheers,
> 
> Sean
> 
> > Good morning,
> >
> > I want to read soil type info from grib1 file, but I'm not know a variable
> > name. I expect that this variable contains a value between 1 and 9,
> > corresponding to the possible different types of soil for each grid point.
> >
> > I'm use NetcdfFile library but I can not find the variable.  I attached
> > the file to be checked
> >
> > Thanks in advance
> >
> > Best regards
> >
> > Alessio Frabotta
> >
> 

Ticket Details
===================
Ticket ID: JOH-194711
Department: Support netCDF Java
Priority: Normal
Status: Open
===================
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