This archive contains answers to questions sent to Unidata support through mid-2025. Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated. For the most up-to-date information on the use of NSF Unidata software and data services, please consult the Software Documentation first.
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 =================== 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.