[ncl-talk] confusion with reading attributes

[Rick Brownrigg]

I for one don't understand this line:

  float latitude at MetaData(nlocs) ;

Could you perhaps open the file and provide the output from
"printVarSummary(obsfile)" ??

Rick


On Thu, Nov 21, 2019 at 4:02 PM M P via ncl-talk <ncl-talk at ucar.edu> wrote:

> Hello,
>
> I have a file in the following format
> netcdf aod_viirs_obs_2018041500_f {
> dimensions:
>         nvars = 1 ;
>         nlocs = UNLIMITED ; // (27545 currently)
> variables:
>          ....
>         float latitude at MetaData(nlocs) ;
>
> with  latitude at MetaData just being a variable name
>
> That is falsely being read as an attribute with a code
>
>  obsfile   = addfile("./indata/aod_viirs_obs_2018041500_s.nc4","r")
>  ; lons, lats, AOD
>  lats  =   ndtooned(obsfile->latitude at MetaData(:))    ; Pull off lat
>
> and warning/error
>
> warning:["NclAdvancedFile.c":5317]:AdvancedFileReadVarAtt: (MetaData) is
> not an attribute of (latitude)
>
> How to correct it so that the variable latitude at MetaData is read properly?
>
> Thanks,
>
> Mark
>
>
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