[gradsusr] write in netcdf format

[M.Mahakur]

You can set sdfwrite with option -3dz, if your grads is 2.1.a2+ 
Please see the online doc, I have pasted the relevant lines here.. 


The -3dz, -3dt,-rt and -re options are available in version 2.1.a2+ . 



set sdfwrite <-3dz or -3dt or -4d or -5d> <-rt or -re> <-flt or -dbl> <-nc3 or -nc4> <-chunk> <-zip> fname 

where 

fname output filename (required) 

The following six optional arguments are not enabled by default; each new call to [ http://cola.gmu.edu/grads/gadoc/gradcomdsetsdfwrite.html | set sdfwrite ] will turn them off if they are not included. The default behavior is to write out a variable with the same number of varying dimensions as the defined variable and with no record (unlimited) dimension. -3dt 



forces the output data file to have at least 3 coordinate dimensions (lon, lat, and time) 
-3dz 



forces the output data file to have at least 3 coordinate dimensions (lon, lat, and lev) 
-4d 



forces the output data file to have at least 4 coordinate dimensions (lon, lat, lev, and time) 
-4e 



forces the output data file to have at least 4 coordinate dimensions (lon, lat, time, and ens) 
-5d 



forces the output data file to have 5 coordinate dimensions (lon, lat, lev, time, and ens) 
-rt 



sets the T axis as the record (unlimited) dimension 
-re 

sets the E axis as the record (unlimited) dimension 

From: "lpasmanoranjan" <lpasmanoranjan at gmail.com> 
To: "GrADS Users Forum" <gradsusr at gradsusr.org> 
Sent: Saturday, November 23, 2019 11:49:48 AM 
Subject: Re: [gradsusr] write in netcdf format 

Dear Jha and Dash, 
CDO does not work!! I am getting the following error: 

$> cdo -f nc import_binary data.ctl [ http://data.nc/ | data.nc ] 
Open Error: Unknown keyword in description file 
--> The invalid description file record is: 
--> pdef 38 28 lcc 46.00 5.00 19.00 14.00 30.00 60.00 5.00 60000. 60000. 
The data file was not opened. 
cdo import_binary (Abort): Open failed! 


Dear Mahakud, 
As per your suggestion, I can save only one variable at one level with x and y varying. How about varying the Z-dimension? 

Thank you Jha, Dash and Mahakur for your prompt suggestions. 




On Sat, 23 Nov 2019 at 15:02, M.Mahakur < [ mailto:mmahakur at tropmet.res.in | mmahakur at tropmet.res.in ] > wrote: 



replace newvars=vars 
with 
newvars=u (for example) 

you can write only one variable in a single netCDF. 


From: "Itesh Dash" < [ mailto:itesh.dash at gmail.com | itesh.dash at gmail.com ] > 
To: "GrADS Users Forum" < [ mailto:gradsusr at gradsusr.org | gradsusr at gradsusr.org ] > 
Sent: Saturday, November 23, 2019 10:58:53 AM 
Subject: Re: [gradsusr] write in netcdf format 

Use cdo to convert. Simple and easy. Follow the link below. 

[ https://code.mpimet.mpg.de/boards/1/topics/213 | https://code.mpimet.mpg.de/boards/1/topics/213 ] 




On Sat, Nov 23, 2019, 11:02 AM lpasmanoranjan < [ mailto:lpasmanoranjan at gmail.com | lpasmanoranjan at gmail.com ] > wrote: 

BQ_BEGIN

Dear Users, 
I have a dataset (.DAT format with a .ctl file). I would like to write it in netcdf format. My dataset have multiple variables with various level. Following are the details in my .ctl file: 

xdef 100 linear 55 0.2 
ydef 200 linear 60 0.2 
zdef 11 levels 1000 925 900 850 700 500 300 200 150 100 50 
tdef 120 linear 00Z15May2012 1hr 
VARS 5 
U 11 0 x-wind component (m s-1) 
V 11 0 y-wind component (m s-1) 
W 11 0 z-wind component (m s-1) 
Q2 1 0 QV at 2 M (kg kg-1) 
T2 1 0 TEMP at 2 M (K) 
My grads script to write my data in netcdf format is: 

'open data.ctl' 
'set time 00z15May2012 23z20May2012' 
'set gxout fwrite' 
'define newvars=vars' 
'set sdfwrite [ http://data.nc/ | data.nc ] ' 
'sdfwrite newvars 
'quit' 

This script is not working. 
Any help please?? 

Thank you in advance. 
Kind Regards, 
Mano 
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BQ_END



-- 
Kind Regards, 
Mano 

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