Re: [ferret_users] time axis attribute "Time" not valid ?

[Ansley Manke <ansley.b.manke@xxxxxxxx>]

Hi Paulo,
Yes, the "axis" attribute is expected to take a single-letter as its 
value: X, Y, Z, or T.  However Ferret should issue a warning, not this 
error message.  Here's the text about the axis attribute for a time axis 
from the conventions:

http://cf-pcmdi.llnl.gov/documents/cf-conventions/1.6/cf-conventions.html#idp5333920

Also see the discussion of "coordinate types"
http://cf-pcmdi.llnl.gov/documents/cf-conventions/1.6/cf-conventions.html#coordinate-types

We'll fix Ferret so that it will just issue a "Note" in this instance.

Ansley


On 2/11/2013 5:13 AM, Paulo B. Oliveira wrote:
> Hi,
>
> I realized that the reason I'm not able to access the NEMO model results
> using the thredds server is the "axis" attribute of variable "time".
>
> I found that by downloading the data using ncks and changing the "Time"
> attribute to "T" using ncatted. (see LOG below)
>
> It would be much better not having to download the data, so I wonder if
> there is a way to tell ferret to accept the "Time" attribute.
>
> Regards,
>
> Paulo
>
> =====================================================================
> [pbo@oo tmp]$ ferret
>   	NOAA/PMEL TMAP
>   	FERRET v6.84
>   	Linux 2.6.32-279.14.1.el6.x86_64 32-bit - 12/18/12
>   	11-Feb-13 12:56
>
> yes? use
> "http://puertos.cesga.es:8080/thredds/dodsC/dataset-ibi-analysis-forecast-phys-005-001-daily";
>   *** NOTE:
> At line 174 of file nc_get_attrib.F
> Fortran runtime error: End of record
> ------------------------------------------------------------------------
>
>
> [pbo@oo tmp]$ ncks -d time,682,682 -d depth,0,0 -d longitude,252,504 -d
> latitude,324,648 -v temperature
> "http://puertos.cesga.es:8080/thredds/dodsC/dataset-ibi-analysis-forecast-phys-005-001-daily"; WIb_sst682.cdf
> --------------------------------------------------------------------------------
> [pbo@oo tmp]$ ferret
> ...
> yes? use WIb_sst682.cdf
>   *** NOTE:
> At line 174 of file nc_get_attrib.F
> Fortran runtime error: End of record
> --------------------------------------------------------------------------------
> [pbo@oo tmp]$ ncdump -h WIb_sst682.cdf | grep axis
> 		depth:axis = "Z" ;
> 		latitude:axis = "Y" ;
> 		longitude:axis = "X" ;
> 		time:axis = "Time" ;
> --------------------------------------------------------------------------------
> [pbo@oo tmp]$ ncatted -a axis,time,o,c,T  WIb_sst682.cdf
> [pbo@oo tmp]$ ferret
> ...
> yes? use WIb_sst682.cdf
> yes? sh da
>       currently SET data sets:
>      1> ./WIb_sst682.cdf  (default)
>   name     title                             I         J         K
> L         M         N
>   TEMPERATURE
>            Temperature                      1:253     1:325     1:1
> 1:1       ...       ...
>   
> yes? sh gr temperature
>      GRID GPS1
>   name       axis              # pts   start                end
>   LONGITUDE LONGITUDE          253mr   12W(-12)             5W(-4.9996)
>   LATITUDE  LATITUDE           325 r   35N                  44.001N
>   DEPTH     DEPTH (m)            1 r-  0.49403              0.49403
>   TIME      TIME                 1 r   10-FEB-2013 00:00    10-FEB-2013
> 00:00
>   normal    E
>   normal    F
> yes? shade temperature          !!!!!=== it works just fine!!!!
> yes? quit