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

[Scott Chapal]

Peter McCartney <peter.mccartney at asu.edu> writes:

> julian days would be ratio.

 day-of-year ? :)
> 
> 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? 

I wouldn't.

But I have seen dates encoded that way.  I'm guessing by data-loggers
that were attempting to conserve bits.?  But then again, I've seen
dates formatted a lot of silly ways.

dateTime non-Standard YYYYDDD - Year-and-day-of-year

-Scott

> 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
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> W.K. Kellogg Biological Station
> Michigan State University
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