Hi all,
I'm wondering how to properly apply the 'axis' attribute to coordinate
variables in a curvilinear/two-dimensional coordinate system.
I have data in a Lambert conformal projection, so I have coordinate
variables in x & y, and auxiliary coordinate variables in lat & lon.
Like this:
dimensions:
yc = 135 ;
xc = 160 ;
time = UNLIMITED ; // (5848 currently)
variables:
double yc(yc) ;
yc:long_name = "y-coordinate of Cartesian system" ;
yc:units = "km" ;
double xc(xc) ;
xc:long_name = "x-coordinate Cartesian system" ;
xc:units = "km" ;
double lon(yc, xc) ;
lon:long_name = "longitude" ;
lon:units = "degrees_east" ;
double lat(yc, xc) ;
lat:long_name = "latitude" ;
lat:units = "degrees_north" ;
double time(time) ;
time:long_name = "time" ;
time:axis = "T" ;
time:units = "days since 1979-01-01 00:00:0.0" ;
float temp(time, yc, xc) ;
temp:units = "K" ;
temp:long_name = "Surface Temperature";
temp:coordinates = "lon lat" ;
My question is, which variables is it appropriate to define an 'axis'
attribute with the value "X" for: xc, lon, both, or neither?
Thanks,
Seth
----
Seth McGinnis
Associate Scientist
ISSE/NCAR
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Received on Thu Jul 05 2007 - 17:31:06 BST
