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Re: TDS questions

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 Note that the archive is no longer being updated. We provide the archive for reference; many of the answers presented here remain technically correct, even if somewhat outdated.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.

  • Subject: Re: TDS questions
  • Date: Tue, 03 Jun 2014 10:37:30 -0600
hi dean:

for subsetting, you can use CFGridWriter if its gridded data.
theres no way to stream a netcdf4 file. you have to write it to disk, then copy to stream. could use a SSD for performance.
The TDS ncss service does this for you, but can be slow. If thats not a problem you could use the TDS as a backend for a program that knows how to stuff it into a JMS queue, or whatever you want to do with it. 

john

On 6/3/2014 9:51 AM, Ericson, Dean - 0443 - MITLL wrote:

John,

I was hoping you might clear up some questions for me.  I am currently
looking to take a  netcdf 4 file, subset it by a bounding box, then put
that file onto a JMS topic.  I was wondering if I was duplicating
existing TDS functionality.  As I read the TDS documentation, it looks
as though this is something that TDS can do;  specifically the
subsetting and netcdf file streaming.  I know subsetting exists as a
service, but is there a way to stream the compressed information where a
client on the other side can then decompress it and write it to disk if
desired?  My hope is that by contacting you I can cease duplicate
efforts if they already exist.

Thank you,

Dean Ericson

Dean Ericson

MIT Lincoln Laboratory