On 10/22/2010 9:46 AM, Julia Collins wrote:
Hello,
Benno's comment provides a convenient entry point for me to describe a
recent problem.
On Fri, 22 Oct 2010, Benno Blumenthal wrote:
Note: if the time zone is omitted the default is UTC, and if both time
and time zone are omitted the default is
I can't imagine this change having any traction for the coordinate variable of
time, as some of the answers show.
However, if one thinks about non-coordinate variables, standard_names of
local_time and sidereal_time seem arguably useful.
Even allowing for Roy's perfectly valid arguments agai
Hello-
I don't think I have any standing to vote on CF matters, but I just wanted to
say that I quite agree with Steve Hankin's viewpoint. I personally like
ISO8601 date/time strings for text display, but agree that under-the-hood
encodings such as CF "days since T" or Unix "seconds since the
I agree completely. Using ISO date strings as an encoding for time coordinates
sounds terrible to me, doubly so if you consider that they would have to be
not-quite-ISO in order to accommodate non-Gregorian calendars.
That said, I also agree that it would be great if netcdf tools all knew how to
Hi again,
I must admit that your data is very different to the types of data I work with
and I don't fully understand issues with composite images. Typical data for me
are time series where a series of parameters, including position are logged
every 30 seconds or so as a ship sails along. Year
It is not really a problem to represent this in CF, just less than pretty.
time becomes a function of more than one dimension.
So, if by "local time" you mean that time is such that noon local time
has the sun directly overhead, i.e. local time before the railroads
established time zones, then we
Hi,
On Fri, 22 Oct 2010, Lowry, Roy K wrote:
I wonder how many existing CF data files would have the meaning of their
time channel changed were this suggestion to be adopted.
I am sure many. In some cases it might even make them accurate. :-) At some
level, it's a tradeoff between "breaking" e
On 10/18/10 1:32 AM, Bryan Lawrence wrote:
That's the narrow technical perspective. The "social" question is
whether there is a significant benefit to the community from defining
is a single approach that is general enough to handle the necessary
range of model-generated tracer particle clouds.
Dear All,
I wonder how many existing CF data files would have the meaning of their time
channel changed were this suggestion to be adopted.
If I were Julia I would be reworking my data so that the time channel was true
UT. I've had so many problems in the past with local time co-ordinates.
Hello,
Benno's comment provides a convenient entry point for me to describe a
recent problem.
On Fri, 22 Oct 2010, Benno Blumenthal wrote:
Note: if the time zone is omitted the default is UTC, and if both time
and time zone are omitted the default is 00:00:00 UTC.
To clarify, this is the time
On Fri, Oct 22, 2010 at 6:27 AM, Jon Blower wrote:
> Hi Roy,
>
> Yes, but *only* if the ISO string contains time information. If it only
> contains a date (e.g. "2009-09-01") you can't add a time zone as I understand
> it. Furthermore, there's no default to UTC - in fact the default is local
Sorry, didn't read your original message thoroughly enough. Must stop doing
e-mail before waking up properly.
Cheers, Roy.
-Original Message-
From: Jon Blower [mailto:j.d.blo...@reading.ac.uk]
Sent: 22 October 2010 11:28
To: Lowry, Roy K
Cc: cf-metadata@cgd.ucar.edu
Subject: RE: [CF-m
Hi Roy,
Yes, but *only* if the ISO string contains time information. If it only
contains a date (e.g. "2009-09-01") you can't add a time zone as I understand
it. Furthermore, there's no default to UTC - in fact the default is local time.
(And I'm not sure your syntax is right - I think you us
Hi Jon,
Full ISO8601 does carry time zone expressed in hours relative to UT in the
syntax Zx where x is the offset from Zulu at the right-hand end of the string.
Cheers, Roy.
-Original Message-
From: cf-metadata-boun...@cgd.ucar.edu
[mailto:cf-metadata-boun...@cgd.ucar.edu] On Behalf
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