Hi,
I'd like to add support for dimensionless vertical coordinates in ncWMS and I
have a few questions:
1. How common is it for the transformation between dimensionless coords
and natural coords to be time-dependent? Under what circumstances would this
occur? Does it happen when the coordinate depends on a pressure field that
varies with time?
2. If the VerticalTransform exists, can I assume that
getCoordinateArray() will always return a valid array, i.e. that nj4 has
automatically found all the auxiliary fields necessary to create the transform
(such as pressure)?
3. I can see how to get the units of the transformed vertical coordinate
(i.e. the "natural" coords, via VerticalTransform.getUnitString()) but how can
I get the "positive" direction? In other words, if the natural coordinates are
in metres, how do I know whether this is depth or height?
4. What would be the most "natural" interpolation method in the vertical
when transforming a gridded field from dimensionless coordinates into levels -
nearest-neighbour or linear? (Or something else?)
Thanks,
Jon
--
Dr Jon Blower
Technical Director, Reading e-Science Centre
Environmental Systems Science Centre
University of Reading, UK
Tel: +44 (0)118 378 5213
http://www.resc.reading.ac.uk<http://www.resc.reading.ac.uk/>
