On Wed, Mar 16, 2011 at 5:06 PM, Steve Hankin <steven.c.han...@noaa.gov>wrote:
> > > > P.S. Together with enhancing udunits to handle the formatting of > date-time strings,it would be natural to add the same functionality for > longitudes, too. Ditto degrees of temperature -- degrees F, C and K. > Again -- the challenges of handling times are found in the other units, too > (admittedly with less complexity and MUCH less baggage attached). > > I have to admit I extended udunits for perhaps these problems a long time ago, but there was no way to get my changes back in the original code. I added another component to the units structure so that it would keep track of the direction, so that degrees_north and degrees_east were distinguishable, and I was careful to distinguish between degree_Celsius (no origin) and Celsius_scale (origin) (which is not a code change, just a change in the .dat file that holds all the unit definitions to define terms with clear meanings). As for time, I did define both seconds and years as different physical units, but that was long before multiple calendars which is the better solution. I agree with Steve that we still need to discuss and debate the fundementals -- the discussion so far would invalidate a lot of our current data files for no particular reason. Benno -- Dr. M. Benno Blumenthal be...@iri.columbia.edu International Research Institute for climate and society The Earth Institute at Columbia University Lamont Campus, Palisades NY 10964-8000 (845) 680-4450
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