Re: GDS Datasets in Ferret - update

["Jennifer M. Adams" <jma@xxxxxxxxxxxxx>]

"Jennifer M. Adams" wrote:

> Once I do successfully open a GDS server-side analysis
> request, there is a shorthand name for the data set that is
> something like "_exprcache_104992113430013". The shorthand
> name is useful if you want to include the results of your
> first server-side analysis request in yet another
> server-side analysis request. This shorthand name is
> included in the output of 'query file' (a GrADS command
> similar to "show data"), but I don't know how to retrieve it
> with Ferret. "show data" gives me this (once again, sorry
> about the unsightly line wrapping):
> 
>      currently SET data sets:
>     1>
> 
> http://dataportal.ucar.edu:9191/dods/_expr_{C20C/C20C_A,C20C/C20C_B,C20C/C20C_C,C20C/C20C_D,C20C/C20C_E,C20C/C20C_F,C20C/C20C_G}{ave((slp.1+slp.2+slp.3+slp.4+slp.5+slp.6+slp.7)/7.0,t+0,t=601,12)}{0:358.125,-30:30,1000:1000,00z01jan1949:00z01dec1949}
> (default)
>  name    title                 I      J     K    L
>  RESULT  result of expression  1:192  1:34  ...  1:12
> 
> 
> I'm not exactly sure how GrADS knows the shorthand name, but
> I'm assuming it's part of the metadata that comes back from
> the GDS. Is there any way to recover the shorthand name with
> Ferret?

Since I wrote this, I have learned that the shorthand name
is part of the global attribute :title. In this case, the
title is (lines will wrap): 

"shorthand: /_exprcache_10499826058336 expression:
ave((slp.1+slp.2+slp.3+slp.4+slp.5+slp.6+slp.7)/7.0,t+0,t=601,12)
source datasets: /C20C/C20C_A /C20C/C20C_B /C20C/C20C_C
/C20C/C20C_D /C20C/C20C_E /C20C/C20C_F /C20C/C20C_G"

If I draw a shaded plot of 'result' the whole title appears
above my plot, so that string becomes a ppl label that I can
see using "ppl list labels". Is there a more direct way to
access the netcdf attributes without having to draw a plot? 

Thanks again,
Jennifer


-- 
----------------------------------------
Jennifer Miletta Adams
Center for Ocean-Land-Atmosphere Studies
4041 Powder Mill Road, Suite 302
Calverton, MD 20705-3106
Phone: (301)902-1278 or (301)595-7000
Fax:   (301)595-9793
Email: jma@cola.iges.org