Julian Date format -- interval not dateTime (my thought)

[Peter McCartney]

julian days would be ratio.

YYYYDD would NOT be ordinal - it would be an odd representation of dateTime
that would be really confusing and not supported by most processing systems.
Its like trying to write 111 deg, 1 min, 1 second as 111 deg, 61 seconds -
in priciple, its correct, but why would you do it? 

Peter McCartney(peter.mccartney at asu.edu)
Center for Environmental Studies
Arizona State University


-----Original Message-----
From: Tim Bergsma [mailto:tbergsma at kbs.msu.edu]
Sent: Thursday, March 20, 2003 11:51 AM
To: Scott Chapal
Cc: eml-dev at ecoinformatics.org; Henshaw, Don; Spycher, Gody
Subject: Re: Julian Date format -- interval not dateTime (my thought)


Scott,

Did anyone reply to this yet?  I think the answers are yes and yes (and
yes), but I'm no expert yet on date formats (conveniently, I was out of
the country when that part of EML got finalized).

Tim.

Scott Chapal wrote:
> 
> So..
> 
> "Day of Year" 1-365(6)
> 
> measurementScale: RATIO
> unit: nominalDay
> 
> And, YYYYDDD would be ORDINAL (and a poor choice of date format)?
> 
> -Scott
> 
> Matt Jones <jones at nceas.ucsb.edu> writes:
> 
> > I agree.  We created the unit 'nominalDay' precisely for this purpose.
> > It represents an integer number of days.
> >
> > Matt
> >
> > Tim Bergsma wrote:
> > > Scott,
> > > I was also wondering about "this advice".  I was taught somewhere
> > > not to
> >
> > > confuse Julian Day with day-of-year.  I use day-of-year, but I don't
> > > really know what Julian Day is, and therefore hesitate to say too
> > > much. With regard to "saying that something takes 200 Julian Days",
> > > this is
> >
> > > clearly the same concept as eml dictionary unit nominalDay.
> > > Tim.
> 
> --
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-- 
Tim Bergsma
LTER Information Manager
W.K. Kellogg Biological Station
Michigan State University
Hickory Corners, MI   49060
269/671-2337
tbergsma at kbs.msu.edu
http://lter.kbs.msu.edu
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