I will add that:
my reading of the CF standard is that coordinate (AKA axis, AKA
dimension) variables must be numeric:
http://cf-pcmdi.llnl.gov/documents/cf-conventions/1.4/cf-conventions.html#terminology
says
"coordinate variable
We use this term precisely as it is defined in section 2.3.1 of the NUG.
It is a one-dimensional variable with the same name as its dimension
[e.g., time(time)], and it is defined as a numeric data type with values
that are ordered monotonically. Missing values are not allowed in
coordinate variables. "
So, it would be great if THREDDS could extract the date coordinates from
the file names and make a *numeric* time coordinate/axis/dimension variable.
I know that choosing the units brings up other issues. Perhaps they
could be specified by the THREDDS administrator, or perhaps THREDDS
could just always use units="seconds since 1970-01-01".
On 9/6/2011 3:37 PM, Roy Mendelssohn wrote:
Hi All:
The following has come up in a problem we are working on:
I'd like to aggregate files as in the example toward the bottom of:
http://www.unidata.ucar.edu/software/netcdf/ncml/v2.2/Aggregation.html
"Extracting date coordinates from the filename"
The text in the tutorial states:
'The net effect is to add a coordinate variable, whose values are ISO
8601 formatted date/time Strings, with a _CoordinateAxisType of
"Time" ..."
Is there any for this variable to be a timestamp rather than date/time
Strings?
Listing the values is not that practical since there are over 3000 files and
the number will grow. Thanks for any help.
-Roy
**********************
"The contents of this message do not reflect any position of the U.S. Government or
NOAA."
**********************
Roy Mendelssohn
Supervisory Operations Research Analyst
NOAA/NMFS
Environmental Research Division
Southwest Fisheries Science Center
1352 Lighthouse Avenue
Pacific Grove, CA 93950-2097
e-mail: Roy.Mendelssohn@xxxxxxxx (Note new e-mail address)
voice: (831)-648-9029
fax: (831)-648-8440
www: http://www.pfeg.noaa.gov/
"Old age and treachery will overcome youth and skill."
"From those who have been given much, much will be expected"
"the arc of the moral universe is long, but it bends toward justice" -MLK Jr.
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Sincerely,
Bob Simons
IT Specialist
Environmental Research Division
NOAA Southwest Fisheries Science Center
1352 Lighthouse Ave
Pacific Grove, CA 93950-2079
Phone: (831)658-3205
Fax: (831)648-8440
Email: bob.simons@xxxxxxxx
The contents of this message are mine personally and
do not necessarily reflect any position of the
Government or the National Oceanic and Atmospheric
Administration.
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