[gradsusr] How to store a map, based on station data, in GRADS, in a NetCDF-file?

[Davide Sacchetti]

using define keyword or not does not affect the the result
the problem is that you cannot use the define statement (define x=... or x=... are the same statement because in the latter 'define' is implicit) starting from a station file as default file, you should have a gridded file.
The solution should be easy: set dfile gridded_file (1, 2, ...)
eg.: gridded file unit 2, stnfile unit 1:
set dfile 2
define x=oacres(t,t.1)


hoping it helps
Davide


Dott. Davide Sacchetti
Dipartimento Stato dell’Ambiente e Tutela dai Rischi Naturali
U.O. Clima Meteo Idro
Viale Brigate Partigiane 2, 16129 Genova (I)
tel: +39 0106437535
mail: davide.sacchetti at arpal.liguria.it  web: https://www.arpal.liguria.it/homepage/meteo.html



 Da:   Isimar de Azevedo Santos <isimar.uenf at gmail.com> 
 A:   <pavel at cyclone.tau.ac.il>, GrADS Users Forum <gradsusr at gradsusr.org> 
 Inviato:   13/09/2021 22:31 
 Oggetto:   Re: [gradsusr] How to store a map, based on station data, in GRADS, in a NetCDF-file? 


Hi, Pavel
Why not use simply: "x= ... ", without "define"
Isimar from Brazil.


Em seg., 13 de set. de 2021 às 12:43, Pavel Kishcha <pavel at cyclone.tau.ac.il> escreveu:




Hello to all users of grads, 


A Cressman objective analysis was conducted on the station data to obtain a map representing the station data.
 
'set gxout shaded'
 
'd oacres (gexpr, sexpr)' 
As a result, the map was successfully created.
To store the obtained map in a NetCDF-file, we tried to use the following GRADS commands:
 
'set sdfwrite map.nc' 
‘define x = oacres (gexpr, sexpr)' 
'sdfwrite x' 
  
Unfortunately, we got the following error info: 
DEFINE error: Define not yet valid for station data 
              Default file is a station data file 
  
How to solve this problem and to store the obtained map (based on station data) in GRADS, in a NetCDF-file? Any ideas? 
  
Thank you, 
Pavel Kishcha
 

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