Working on the maps and related data presented here has been a lot of fun and would not have been possible without the direct or indirect help of many, many, many folks. Thanks to you all, those I know and those I don't:
Gwillem Law and his wonderful site http://statoids.com has been invaluable to track administrative divisions.
The following individuals provided direct feedback and help to improve the FIPS 10-4 data: Jeroen Van Steirteghem, Andreas Hörstemeier.
The following individuals provided direct feedback and help to improve the VMAP0 data: Olaf Willenbrock.
Jesper Nørgaard Welen seems to know everything about time zones. The maps presented here have benefited immensely from his own map in WorldTimeExplorer and from his frequent contributions to the tz mailing list.
Chris Walton is my go-to person when it comes to timezones of Canada. I have “stolen” quite a bit from his own map.
The tz team, in particular Arthur Olson and Paul Eggert for running the show, but also all the folks on the lookout to enrich the tz database.
The following individuals provided direct feedback and help to improve the TZ maps: Eric Ulevic, Vernon Cole, Oscar van Vlijmen, Rob Ellison, Adam Green, Gary Baker, Boaz Stuller, Russel Sayers, Aldalbert Michelic, Dan O’Neill, Paul Salber, Pavol Vaskovic, Don Tong, James Diebel.
The providers of base maps:
The teams providing free GIS software:
All that represents an incredible amount of software that works amazingly well.