SDF file has no discernable X coordinate

[Karin Meier-Fleischer]

Hi,

have you tried to open the ddf file using xdfopen inside gradsnc?

Test the following ddf file:

dset ^ISBA_EVAP_exp2_2006.nc
dtype netcdf
undef -1e15 missing_value
unpack scale_factor add_offset
title evaporation daily cumul
xdef lon
ydef lat
zdef z
tdef time
vars 1
evap 1 t,x,y evaporation cumul
endvars

Try to open it with:

>> gradsnc -lc 'xdfopen isba.ddf'


Bye, Karin
---------------------------------\\---------------------------------------
Karin Meier-Fleischer             \\ Max-Planck-Institut fuer Meteorologie
Phone: +49-40-41173-431            \\   Abteilung Modelle & Daten
FAX:   +49-40-41173-476             \\    Bundesstr. 53
Email: karin.meier-fleischer at zmaw.de \\   D-20146 Hamburg
http://www.mad.zmaw.de/               \\  Germany
---------------------------------------\\---------------------------------

On Tue, 20 Nov 2007, Remi Meynadier wrote:

> Hi folks
>
> i want to open a netcdf file (see the ncdump -h below) but with no success :
>
> i've tried :
>
> -sdfopen myfile.nc :
> GRads answered :
> Scanning self-describing file:  ISBA_Evap_exp2_2006.nc
> SDF file has no discernable X coordinate.
>
> - i've created a ddf file (see below)
> GRads:
> "Scanning description file:  isba.ddf
> NetCDF Error (nc_open): Unable to open file"
>
> Does someone have an idea of what's going on ?
>
> Thanks in advance
> Remi
>
>
>
> netcdf ISBA_Evap_exp2_2006 {
> dimensions:
>        lon = 101 ;
>        lat = 51 ;
>        z = 3 ;
>        time = UNLIMITED ; // (365 currently)
> variables:
>        float lon(lon) ;
>                lon:valid_range = -20.f, 30.f ;
>                lon:associate = "lon" ;
>                lon:units = "degrees East" ;
>                lon:long_name = "lon" ;
>        float lat(lat) ;
>                lat:valid_range = -5.f, 20.f ;
>                lat:associate = "lat" ;
>                lat:units = "degrees North" ;
>                lat:long_name = "lat" ;
>        int z(z) ;
>                z:valid_range = 1, 3 ;
>                z:associate = "z" ;
>                z:units = "-" ;
>                z:long_name = "Level Index (increasing below surface)" ;
>        int time(time) ;
>                time:units = "timesteps since 2006-01-01 00:00:00" ;
>                time:title = "Time steps" ;
>                time:tstep_sec = 86400.f ;
>                time:long_name = "Time step axis" ;
>                time:time_origin = " 2006-JAN-01 00:00:00" ;
>        float Evap(time, lat, lon) ;
>                Evap:associate = "time lat lon" ;
>                Evap:units = "kg m-2 day-1" ;
>                Evap:long_name = "Total Evapotranspiration" ;
>                Evap:missing_value = 1.e+20f ;
>
> // global attributes:
>                :Conventions = "COARDS" ;
>                :filename = "ISBA_Evap_exp2_2006.nc" ;
>                :CreatedBy = "Aaron Boone at CNRM Meteo-France" ;
>                :title = "ISBA results for ALMIP" ;
>                :project = "ALMIP-PhaseI" ;
>                :production = "Transfered to the single file on 20071120
> at 155716.264" ;
> }
>
> ddf file
>
> dset ISBA_EVAP_exp2_2006.nc
> dtype netcdf
> undef -1e15 missing_value
> unpack scale_factor add_offset
> title evaporation daily cumul
> xdef 101 linear  -20.  0.5
> ydef 51 linear  -5  0.5
> zdef 3 linear 1 1
> tdef 365 linear 00z01jan2006 1dy
> vars 1
> evap 1 t,x,y evaporation cumul
> endvars
>