[gradsusr] netcdf point (station) datasets in grads

[James T. Potemra]

Sorry if I misread the initial question, but you're right having 
multiple stations in a single file will not work.  On the other hand if 
you have a single station in a single file, and this file is CF-1.6, you 
can access this via GrADS with an appropriate control file.  And yes, 
IDV can recognize the new CF-1.6 discrete geometry, but other client 
tools may need a work-around for the missing lat/lon dimensions.

Jim

On 10/30/13 2:18 AM, Jennifer Adams wrote:
> There is no interface in GrADS for handling station data in netcdf 
> format. There has been no demand or need for it because no standard 
> existed for representing station data with the netcdf data/metadata 
> framework. The CF discrete sampling geometry convention was put 
> forward by Unidata in order to establish a standard for the community, 
> but data providers and software developers have not rushed to 
> adopt/implement this standard. That sort of effort generally requires 
> dedicated funding. Unidata is doing its part by supporting the 
> convention in the netcdf java library and in IDV. If you want to look 
> at this data with GrADS, you will have to write some external code to 
> convert it to the GrADS station data format.
>
> In some cases, you can try to map your station data into the gridded 
> data interface in GrADS, but that is awkward -- X becomes the 
> dimension for station id, lat and lon become data variables, and you 
> cannot display an aggregation of stations in lat/lon space. The 
> relative success of this strategy would depend on the way the metadata 
> is presented in your data file.
>
> --Jennifer
>
>
> On Oct 29, 2013, at 1:47 PM, Ghansham Sangar wrote:
>
>> R/Sir
>> Is it possible to open point datasets in netcdf format following CF 
>> conventions (see discrete sampling geometry in cf metedata 
>> conventions1.6 document available online). I could not find online 
>> documentation regarding same. I am using grads 2.0.2. The dataset is 
>> satellite derived wind vectors having relevant fields (ucomp,  vcomp, 
>> wind speed, Windows direction, latitude, longitude,  date/time of 
>> each observation).
>> Ghansham
>>
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