[CF-metadata] Ocean CTD data following CF Conventions v1.6

From: andrew walsh <awalsh>
Date: Thu, 5 Apr 2012 10:42:44 +1000

Hi John,

Thank for your offer to check a sample netCDF CTD data file. At moment we don't
have
some real .nc file but when we do I can send you a file for checking.

Andrew

----- Original Message -----
From: John Caron
To: cf-metadata at cgd.ucar.edu
Sent: Wednesday, April 04, 2012 5:55 AM
Subject: Re: [CF-metadata] Ocean CTD data following CF Conventions v1.6


Hi all:

Lets see, I havent followed the entire conversation, but:

1) Andrew if you can send me a sample file (not just the CDL) I can check if it
works in the CDM with the new 1.6 conventions, and maybe give you some advice
from my POV.

2) Aggregation in the CDM comes in 2 flavors. 1) The original implementation
simply appends multidimensional arrays together, eg "joinNew " and
"joinExisting" NCML aggregation. I call it "syntactic aggregation" because it
doesnt know what its aggregating, and the homogeneity requirements are strict.
2) "Feature Type collections" (aka "semantic aggregation") are the more recent
development. These understand the coordinate information of the data, and so can
handle variations in the representation, eg ragged arrays, scalar coordinates,
etc. In this case, the CDM understands a dataset as a collection of "features
objects", which can be stored in a collection of files. The interfaces to these
collections is still under development. Most current and future work in the CDM
is in this category.

John

snip ....
Received on Wed Apr 04 2012 - 18:42:44 BST