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Re: [netcdfgroup] ncdump (snapshot2009102000) missing some coordinate variables for OPeNDAP data set

  • To: Jennifer Adams <jma@xxxxxxxxxxxxx>
  • Subject: Re: [netcdfgroup] ncdump (snapshot2009102000) missing some coordinate variables for OPeNDAP data set
  • From: John Caron <caron@xxxxxxxxxxxxxxxx>
  • Date: Tue, 27 Oct 2009 23:14:34 -0600
Jennifer Adams wrote:

I don't know about other OPeNDAP servers, but GDS won't allow a .dods request without any constraints.

the TDS doesnt care if there are constraints or not, but it will refuse requests larger than a configurable size. The default i think is 500 Mb for binary, and 50 Mb for ascii.

I guess I'm not happy about having to tell users they need to add something in order to use URL's which have worked for a number of years, or about having to change application code so it recognizes and passes a prefix on through to the open-nc routine.
I agree completely.

the netcdf-java opendap client doesnt support prefixes. in fact, it doesnt 
allow you to open a constrained dataset. you open the entire dataset, then send 
constraints to read the data. the idea is to treat a remote dataset the same as 
a local dataset. sometimes that doesnt work very well, but mostly it works ok, 
and its often a great advantage to the application who only sees the netcdf API.



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