[netcdfgroup] Using file:// protocol to retrieve opendap data...

• To: opendap-tech-request@xxxxxxxxxxx, netcdfgroup <netcdfgroup@xxxxxxxxxxxxxxxx>
• Subject: [netcdfgroup] Using file:// protocol to retrieve opendap data...
• From: Dennis Heimbigner <dmh@xxxxxxxxxxxxxxxx>
• Date: Mon, 10 Jan 2011 17:21:46 -0700

The netcdf snapshot
 (ftp://ftp.unidata.ucar.edu/pub/netcdf/snapshot/netcdf-4-daily.tar.gz)
available TOMORROW (Tuesday)
now supports the ability to access opendap data stored in files.

If you have a file called, say, dataset.dods, it is expected that
it contains the on-the-wire data for a request to an opendap server.
Such a file can be created using, for example, wget or a web browser.
Similarly, one can save .das and .dds data in files.

Suppose you have such a file at absolute path /home/abc/dapdata.dods.
You should now be able to access it using, for example the command:
    ncdump file:///home/abs/dapdata
You could also use nccopy instead of ncdump.
NOTE: the final .dods is left off.

There are some things to note:
1. You must have at least a .dods file (e.g. dataset.dods).

2. If there is also a /home/abs/dapdata.das,
   it will be used to obtain attributes.

3. If there is a /home/abs/dapdata.dds
   it will be used.  If this does not exist,
   then the dds part of the .dods file will be used.

If you are in a position to try this out, please do so
and let me know if there are any problems.

=Dennis Heimbigner (dmh@xxxxxxxx)
 Unidata

• Follow-Ups:
  • [netcdfgroup] apparent bug in the latest beta snapshot of nccopy
    • From: ed zaron
  • Re: [netcdfgroup] Using file:// protocol to retrieve opendap data...
    • From: ed zaron