Re: OGC Temporal DWG. Was: space and time

Hi Chris,

who wrote:
One concern that I have is that we do not re-invent the
 wheel, and do nugatory work, hence this email. I do not
 envisage that we will need to do much with Calendars, which
 have been covered so well by Dershowitz and Reingold.

=====================================
No question the quality of the issue coverage (Calendars) is first rate.

However, the computations are not transparently self-evident and the references you cite in the Wiki are not available on-line - or are they ?

3. Calendrical Tabulations 1900-2200, Edward M. Reingold, Nachum Dershowitz. Hardcover: 636 pages. Publisher: Cambridge University Press (16 Sep 2002) Language: English ISBN-10: 0521782538 ISBN-13: 978-0521782531

4. Calendrical Calculations, Nachum Dershowitz, Edward M. Reingold. Paperback: 512 pages. Publisher: Cambridge University Press; 3 edition (10 Dec 2007) Language: English ISBN-10: 0521702380 ISBN-13: 978-0521702386 

Accessability to "Wheels known to have been invented" is a Wiki issue, I think.

--Gannon




--------------------------------------------
On Thu, 7/24/14, Little, Chris <chris.little@metoffice.gov.uk> wrote:

 Subject: OGC Temporal DWG. Was: space and time
 To: "Gannon Dick" <gannon_dick@yahoo.com>, "andrea.perego@jrc.ec.europa.eu" <andrea.perego@jrc.ec.europa.eu>, "frans.knibbe@geodan.nl" <frans.knibbe@geodan.nl>, "Simon.Cox@csiro.au" <Simon.Cox@csiro.au>, "Chris Beer" <chris@codex.net.au>
 Cc: "public-locadd@w3.org" <public-locadd@w3.org>, "public-egov-ig@w3.org" <public-egov-ig@w3.org>, "public-lod" <public-lod@w3.org>, "temporal@lists.opengeospatial.org" <temporal@lists.opengeospatial.org>, "Piero Campalani" <cmppri@unife.it>, "Matthias Müller" <matthias_mueller@tu-dresden.de>
 Date: Thursday, July 24, 2014, 9:36 AM
 
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 Dear Colleagues,
  
 OGC started a Temporal Domain Working Group last year
 to address a number of problems in the geospatial domain. In
 particular, that time is usually just viewed as Yet Another
 Attribute of Features, rather than a first class
 coordinate.
  
 We agreed earlier this year, in Geneva, that the OGC
 Naming Authority would have a branch to register Temporal,
 and index based, Coordinate Reference Systems, and we agreed
 on the fundamental attributes that a CRS should have to be
 registered. 
  
 We hope to produce a Best Practice document this year
 to help clarify many confusions between CRSs, notations,
 calendars, operations and calculations. I think that now we
 have a good enough understanding of the underlying
 conceptual issues and current
 geospatial standards.
  
 We have been accumulating info on an open wiki http://external.opengeospatial.org/twiki_public/TemporalDWG/WebHome
 and discussing via our
 mailing list, though we are not very disciplined about
 it.
  
 One concern that I have is that we do not re-invent the
 wheel, and do nugatory work, hence this email. I do not
 envisage that we will need to do much with Calendars, which
 have been covered so well by Dershowitz and Reingold.
  
 Best wishes, Chris
  
  
 Chris Little
 
 
 Co-Chair, OGC Meteorology & Oceanography Domain Working
 Group
 Co-Chair, OGC Temporal Domain
 Working Group
 
 
 
 IT Fellow -
 Operational Infrastructures
 
 
 Met Office  FitzRoy Road  Exeter  Devon  EX1 3PB 
 United Kingdom
 
 
 Tel: +44(0)1392 886278  Fax: +44(0)1392 885681  Mobile:
 +44(0)7753 880514
 
 
 E-mail: chris.little@metoffice.gov.uk  http://www.metoffice.gov.uk
  
 I am normally at work Tuesday,
 Wednesday and Thursday each week
  
  
  
  
  
  
  
  

Received on Thursday, 24 July 2014 16:24:19 UTC