On 2020-01-13 09:15, Jeffery Nichols wrote:
On Fri, 10 Jan 2020 at 16:51, Paul Eggert wrote:
Thank you for those corrections. I installed the attached patch to tzdb's development version and these fixes should appear in the next release.> Great! I was also wondering whether anyone on your team has more data about what towns were part of America/Nipigon. I'm trying to map all of the Canadian IANA zones on OpenStreetMap. Your tzdb mentions that Nipigon was the largest town in its zone, which suggests that the zone wasn't limited to Nipigon town boundaries, but it doesn't give any clues about what other towns were found to follow it.
Look at the sites http://efele.net/maps/tz/canada/ and https://github.com/evansiroky/timezone-boundary-builder for Canadian boundary info and background; search in the mailing list archive from 2006 back for Nipigon and Ontario, and look in zone.tab and northamerica for comments about NW Ontario in context: $ egrep '^CA\s+.*\s-\sON' /usr/share/zoneinfo/zone.tab CA +4339-07923 America/Toronto Eastern - ON, QC (most areas) CA +4901-08816 America/Nipigon Eastern - ON, QC (no DST 1967-73) CA +4823-08915 America/Thunder_Bay Eastern - ON (Thunder Bay) CA +484531-0913718 America/Atikokan EST - ON (Atikokan); NU (Coral H) CA +4953-09709 America/Winnipeg Central - ON (west); Manitoba CA +4843-09434 America/Rainy_River Central - ON (Rainy R, Ft Frances) $ less '+/Ontario|Nipigon|Atikokan|Rainy_River|Thunder_Bay' northamerica If you can't find an online searchable tz mailing list archive, you can download about 18MB+ of archives starting from https://mm.icann.org/pipermail/tz/1986-November.txt.gz to the current month, gunzip to about 70MB+ of posts, import them into a folder in your mail client for convenient searching, and subscribe to the mailing list(s) to keep your local archive up to date. -- Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada This email may be disturbing to some readers as it contains too much technical detail. Reader discretion is advised.