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  in THREDDS, in > > particular grid() and geogrid(). We did not find any reference to them in > > the documentation. Trying to invoke them , 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 > > > > > >  https://docs.opendap.org/index.php/Server_Side_Processing_Functions > >  > > 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 =================== NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.
NOTE: All email exchanges with Unidata User Support are recorded in the Unidata inquiry tracking system and then made publicly available through the web. If you do not want to have your interactions made available in this way, you must let us know in each email you send to us.