NOTE: The cf-satellite mailing list is no longer active. The list archives are made available for historical reasons.
Tom,I think your simple index coordinate variable and my label coordinate variable are pretty much the same thing. Yours would contain a numeric sequence, and mine would contain descriptive strings. They both are examples of parametric drivers. The remaining question is - what constitutes a sufficiently unambiguous way to identify the ensemble of variables used to describe each band? Put another way, are the existing conventions for identifying auxiliary coordinate variables sufficient to the task of identifying the descriptors for the bands?
Let's say that we have a parametric driver coordinate variable named band (with dimension band) that has an axis type of "index", and variables with axis types of "wavenumber", "bandwidth", and "polarization" (each with dimension band). Is it sufficient to identify the wavenumber, bandwidth, and polarization variables as auxiliary coordinates on our data variable (via the coordinates attribute)? Or is there a need to more explicitly declare the ensemble (perhaps via an attribute on the band coordinate variable)?
Jim On 7/25/2011 3:02 PM, Tom Whittaker wrote:
Hi Jim... On Mon, Jul 25, 2011 at 12:44 PM, Jim Biard<Jim.Biard@xxxxxxxx> wrote:Is this just too far out?Far out, man!! ;-) Seriously, though, I don't see the need for such a device ("...make the "band" coordinate variable an array of label strings..."). Based on what Tom Rink and John Caron have said, it looks like defining a "coordinate axis type" using a few select concepts is the best approach. We'll see what John as to say about the notion of a simple index being used as a coordinate variable...and go from there... tom
-- Jim Biard Government Contractor, STG Inc. Remote Sensing and Applications Division (RSAD) National Climatic Data Center 151 Patton Ave. Asheville, NC 28801-5001 jim.biard@xxxxxxxx 828-271-4900
cf-satellite archives: