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 <[email protected]> wrote: Subject: OGC Temporal DWG. Was: space and time To: "Gannon Dick" <[email protected]>, "[email protected]" <[email protected]>, "[email protected]" <[email protected]>, "[email protected]" <[email protected]>, "Chris Beer" <[email protected]> Cc: "[email protected]" <[email protected]>, "[email protected]" <[email protected]>, "public-lod" <[email protected]>, "[email protected]" <[email protected]>, "Piero Campalani" <[email protected]>, "Matthias Müller" <[email protected]> Date: Thursday, July 24, 2014, 9:36 AM #yiv4303497829 #yiv4303497829 -- .yiv4303497829EmailQuote {margin-left:1pt;padding-left:4pt;border-left:#800000 2px solid;}#yiv4303497829 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: [email protected] http://www.metoffice.gov.uk I am normally at work Tuesday, Wednesday and Thursday each week
