[CF-metadata] interpreting time and vertical axis

From: Yilmaz Arslanoglu <yilmaz.arslanoglu>
Date: Tue, 9 Nov 2010 15:59:24 +0100

Hello;

I had a number of questions regarding interpretation of time and
vertical axis in a given NetCDF file
(vertical especially for ocean current data)

1) What should be the default interpretation of the timestamps on a
given time axis
when there is no explicit CF convention based information in a given
file (in COARDS format we can say)

Should they be taken the centers of time intervals, or the starting
point of the intervals ?

2) Should the corresponding values be assumed to be the average of
values on that interval or measurements
at that specific timestamp?

3) For vertical layer if I have the following depths: [0.0, 10.0,
50.0], should this be interpreted as three layers with
boundaries [0.0, 10.0] [10.0, 50.0] [50.0, +inf] ?

4) And finally, is it usual to apply interpolation in these axes
(time, vertical) or just locating the closest time record
and vertical layer is the general approach since they are in general
the averaged values on that time interval or on that vertical layer?

Thanks in advance,
Yilmaz
Received on Tue Nov 09 2010 - 07:59:24 GMT