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[THREDDS #VDG-489239]: grid and geogrid server-side DAP functions



Greetings Cesare,

To add to Dennis' reply, if I am reading the functionality of grid() 
and geogrid() correctly, these are subsetting functions? If so, you 
can use the NetcdfSubset Service, which is part of the THREDDS Data 
Server. I see you are also using pydap? If you are working in python, 
our library Siphon will setup the NCSS queries for you and hand you 
back a netcdf4-python Dataset object. For some examples, see here:

https://unidata.github.io/siphon/latest/examples/index.html#ncss

Cheers,

Sean

> We do not currently support server-side functions for Thredds.
> Our current recommendation is that you run a Jupyter server
> on the same machine as the Thredds server. That way you can upload
> programs to the Jupyter server to execute and obtain the rapid access
> to Thredds datasets by being on the same machine. This approach has
> the advantage that you can carry out much more sophisticated
> server-side computations in the Jupyter server than are likely
> to be supported by a more limited Thredds capability.
> 
> > Full Name: Cesare Rossi
> > Email Address: address@hidden
> > Organization: Terradue S.r.l.
> > Package Version: Version 4.6.11 - 2017-12-04T16:22:46-0700
> > Operating System: CentOS Linux release 7.6.1810 (Core)
> > Hardware:
> > Description of problem: Dear support,
> >
> > we are looking for DAP server-side processing functions [1] in THREDDS, in 
> > particular grid() and geogrid(). We did not find any reference to them in 
> > the documentation. Trying to invoke them [2], we obtain:
> >
> > Error 500 - opendap.servers.parsers.ASTfcn cannot be cast to 
> > opendap.servers.parsers.ASTprojection
> >
> > Are they supported?
> >
> > Thanks in advance
> >
> > Best regards,
> > Cesare Rossi
> >
> >
> > [1] https://docs.opendap.org/index.php/Server_Side_Processing_Functions
> > [2] 
> > https://pydap.readthedocs.io/en/latest/client.html#calling-server-side-functions
> >
> >
> 
> =Dennis Heimbigner
> Unidata
> 


Ticket Details
===================
Ticket ID: VDG-489239
Department: Support THREDDS
Priority: Normal
Status: Open
===================
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