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January 2008

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27 discussions

Theory file mentions CCME - CC3E is now available
by Jonathan Leffler Jan. 7, 2008

Jan. 7, 2008

In the distribution of the Olson database, the Theory file mentions "Calendrical Calculations, Millennium Edition" from 2001. There is a new edition of the book available now: Calendrical Calculations, 3rd Edn. 2008 Nachum Dershowitz, Edward M Reingold Cambridge University Press ISBN 978-0-521-88540-9 (hardback) ISBN 978-0-521-70238-6 (paperback) Web sites: http://www.cambridge.org/9780521885409 http://www.calendarists.org/ (Note: the latter web site does not mention the 3rd Edn as of 2008-01-06; I'm not clear whether it will be updated to do so. It does have an extensive set of errata for CCME on it.) -- Jonathan Leffler <jonathan.leffler(a)gmail.com> #include <disclaimer.h> Guardian of DBD::Informix - v2007.0914 - http://dbi.perl.org "Blessed are we who can laugh at ourselves, for we shall never cease to be amused."

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Shapefile for Olson time zone names
by Mark Shuttleworth Jan. 2, 2008

Jan. 2, 2008

Hi folks I'm trying to map from latitude and longitude to Olson time zone names, and haven't had any luck locating the relevant data. Does anyone know of an existing data set, in any format which I could ultimately get into PostGIS (Shapefile, or PostGIS, or anything similar), which would serve this purpose? If anyone is interested in helping to create such a data set I did find a potential starting point: this data set from BBN which is old (2002) and only maps to the UTC time offsets (+1, +2 etc): http://openmap.bbn.com/data/shape/timezone/ I would love to see such a data set becoming a standard part of the ZoneInfo repository, updated in an open fashion. If some funding would help to get that started, I'll gladly entertain proposals. Mark

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