[gradsusr] netcdf point (station) datasets in grads

[Jennifer Adams]

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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