This is very nicely done. I'm browsing through the rendered maps and it appears to have much more accurate borders than the Efele maps. I've added it to the list of time zone geolocation projects here: http://stackoverflow.com/a/16086964/634824 -Matt ________________________________ From: tz-bounces@iana.org <tz-bounces@iana.org> on behalf of Evan Siroky via tz <tz@iana.org> Sent: Sunday, October 2, 2016 3:50 PM To: tz@iana.org Subject: [tz] New shapefile of world's timezones based off of Open Street Map data Hello All, I have just made a first release of a shapefile of the geographic extent of the timezone database based mostly off of Open Street Map data. All of the borders between countries, states and cities come directly from Open Street Map. This shapefile also includes the territorial waters of countries as defined in Open Street Map. Please see my github project for more details. The shapefile can be found in the project releases. https://github.com/evansiroky/timezone-boundary-builder Evan.

Congratulations on your work, it's impressive. I always dreamed of doing something like that, but was also stopped in my tracks every time I estimated the amount of work it would be. I will add a link from my pages. One suggestion: In timezones.json, when a timezone is more than just pulling OSM data, include some comment that documents the operation and/or the source of the data. America/Dawson is a good example: where did the geometry come from? I think that transparency is important to establish the legitimacy of the map (and if you happen to have taken it from my maps, you should bypass me and cite directly the source I used). Of course, that also means that things like "Ranking Inlet-tz" should be documented in OSM. Eric.