World Timezone Map

Fri May 9 00:16:14 UTC 1997

I was ever so glad to receive the recent email fro Chuck Ellis
of MaconUSA, LLC.  I have been busy behind the scenes collecting
and organizing the boundary data for the time zone map capability
previously discussed in the tz archive at elsie.nci.nih.gov.
This was without the knowledge of, or data from, maconusa.com.

I wanted to respond to Chuck Ellis' email in a timely fashion,
and in lieu of what I read in that email, I wanted to introduce
my internal time zone boundary numbering scheme for the current set
of countries with multiple internal time zones that I have been
working on to facilitate discussion of the status and accuracy
of the boundary data associated with these key otherwise missing
boundaries.

Following up on the ISO-3166 work already done with respect to the
Time Zone Database (tz), I organized my efforts around that standard
as well.  So, high level compatibility with maconusa.com should
already be achieved.

Likewise, I gathered the 1:1,000,000 scale Digital Chart of the
World (DCW) data and augmented it with 1:100,000 USGS state and
county data from the 1990 census.  I realized that many of the
poltical boundaries had changed since 1992, when the version
of DCW to which I obtained access was released.  I was hoping to
update that with the Vector Smart Map Level 0 (VMap0) data once
I could get my hands on it.  I was also prepared to work backward
from the .pdf map files that are posted by the CIA as part of
their web page providing access to "The World Factbook 1996", as
a last resort.  There is an actual a time zone map of the world
published there as well, for what it is worth.  This web page is
located at or near

	http://www.odci.gov/cia/publications/nsolo/wfb-all.htm

AS Chuck Ellis' email arrived, I still did not have accurate data
for, or descriptions of, the time zone boundaries inside of countries
with multiple time zones, although boundaries 05.01, 06.01, 07.01,
15.01, and 17.01 in the attached table may simply be the distinction
between the mainland and the island(s) in question.

As for viewing map data, I acquired a copy of GRASS and Grassland
(a beta copy for SunOS5 from LAS, Inc. of Canada of the latter)
which permit the viewing of VPF (DCW, VMap0) and SDTS (USGS) file
formats.  I am really new at all of this.  So, exactly how to proceed
to take any of the various .zip files at maconusa.com and to make use
of these Unix-based viewers would be appreciated.  (I would prefer
to stay Unix-based, if that is at all possible.)

The goal, as Chuck Ellis observed, should most definitely be to
create a set of time zone polygons, because the ability to automatically
update the gazetteer whenever a change is introduced is straightforward,
simple, and an already solved problem with already written available
code.

Anyhow, here is the ISO-3166 sorted list of internal time zone
boundaries to which I have been alluding.  Of the 30 ISO-3166 "countries"
with multiple zones in the tz database, there are only 23 which currently
have multiple time zones.  These 23 countries have 69 internal boundaries
by my current tally.  As we are all aware, multiple time zones include
the distinction between the boundaries when Daylight Savings Time is in
effect, e.g. the distinction between the U.S. Eastern Time Zone with and
without that portion of Indiana that does not observe daylight savings
time attached in the standard time October-to-April period (boundary 22.07)
and in the daylight time April-to-October period (boundary 22.08),
respectively, of any given year.  Note that Antarctica and Greenland
boundaries isolate the tz zones in question from the rest of the land
mass, as opposed to separating a series of mostly vertical strips from
each other like the boundaries of the other 21 ISO-3166 "countries" listed
below.

Dave Skinner
dave at kirdu.jpl.nasa.gov
818-354-0114 (voice)
818-393-9900 (fax)

---------------------------------------------------------------------------

01.	AQ	Antarctica

	------------------------------------------------------------- 01.01
	|Antarctica/Palmer			 --4:00	ChileAQ
	-------------------------------------------------------------|
	------------------------------------------------------------- 01.02
	|Antarctica/Mawson			 +6:00	None
	-------------------------------------------------------------|
	------------------------------------------------------------- 01.03
	|Antarctica/Casey			 +8:00	None
	-------------------------------------------------------------|
	------------------------------------------------------------- 01.04
	|Antarctica/DumontDUrville		+10:00	None
	-------------------------------------------------------------|
	------------------------------------------------------------- 01.05
	|Antarctica/McMurdo			+12:00	NZAQ
	-------------------------------------------------------------|

02.	AU	Australia

	Indian/Christmas			 +7:00	None
	------------------------------------------------------------- 02.01
	Australia, Western
		Australia/Perth		 	 +8:00	None
	------------------------------------------------------------- 02.02
	Australia, Central
		Australia/Adelaide		 +9:30	AS
		----------------------------------------------------- 02.03
		Australia/Darwin		 +9:30	Aus --> None
	------------------------------------------------------------- 02.04
	Australia, Eastern
		Australia/Brisbane		+10:00	AQ --> None
		----------------------------------------------------- 02.05
		Australia/Hobart		+10:00	AT
		----------------------------------------------------- 02.06
		Australia/Sydney		+10:00	AN
	------------------------------------------------------------- 02.07
	Australia/Lord_Howe			+10:30	LH

03.	BR	Brazil

	America/Porto_Acre			 --5:00	None
	------------------------------------------------------------- 03.01
	Brazil, Western
		America/Cuiaba			 --4:00	Brazil
		----------------------------------------------------- 03.02
		America/Manaus			 --4:00	None
	------------------------------------------------------------- 03.03
	Brazil, Eastern
		America/Fortaleza		 --3:00	None
		----------------------------------------------------- 03.04
		America/Sao_Paulo		 --3:00	Brazil
	------------------------------------------------------------- 03.05
	America/Noronha				 --2:00	None

04.	CA	Canada

	Canada, Pacific
		America/Vancouver	 	 --8:00	Vanc
	------------------------------------------------------------- 04.01
	Canada, Mountain
		America/Dawson_Creek	 	 --7:00	None
		----------------------------------------------------- 04.02
		America/Edmonton	 	 --7:00	Edm
	------------------------------------------------------------- 04.03
	Canada, Central
		America/Regina		 	 --6:00	None
		----------------------------------------------------- 04.04
		America/Winnipeg	 	 --6:00	Winn
	------------------------------------------------------------- 04.05
	Canada, Eastern
		America/Montreal	 	 --5:00	Mont
	------------------------------------------------------------- 04.06
	Canada, Atlantic
		America/Halifax		 	 --4:00	Halifax
	------------------------------------------------------------- 04.07
	Canada, Newfoundland
		America/St_Johns	 	 --3:30	StJohns

05.	CL	Chile

	Pacific/Easter				 --6:00	Chile
	------------------------------------------------------------- 05.01
	America/Santiago			 --4:00	Chile

06.	EC	Ecuador

	Pacific/Galapagos			 --6:00	None
	------------------------------------------------------------- 06.01
	America/Guayaquil			 --5:00	None

07.	ES	Spain

	Atlantic/Canary				 +0:00	EU
	------------------------------------------------------------- 07.01
	Europe/Madrid				 +1:00	EU

08.	FM	Micronesia

	Pacific/Yap				+10:00	None
	------------------------------------------------------------- 08.01
	Pacific/Ponape (Pohnpei)		+11:00	None
	------------------------------------------------------------- 08.02
	Pacific/Kosrae				+12:00	None

09.	GL	Greenland

	------------------------------------------------------------- 09.01
	|America/Thule				 --4:00	Thule
	-------------------------------------------------------------|
	------------------------------------------------------------- 09.02
	|America/Godthab (Nuuk)			 --3:00	EU
	-------------------------------------------------------------|
	------------------------------------------------------------- 09.03
	|America/Scoresbysund (Ittoqqortoormiit) --1:00	EU
	-------------------------------------------------------------|

10.	ID	Indonesia

	Asia/Jakarta				 +7:00	None
	------------------------------------------------------------- 10.01
	Asia/Ujung_Pandang			 +8:00	None
	------------------------------------------------------------- 10.02
	Asia/Jayapura				 +9:00	None

11.	JP	Japan

	Asia/Ishigaki				 +8:00	None
	------------------------------------------------------------- 11.01
	Asia/Tokyo				 +9:00	None

12.	KI	Kiribati

	Pacific/Tarawa				+12:00	None
	------------------------------------------------------------- 12.01
	Pacific/Enderbury			+13:00	None
	------------------------------------------------------------- 12.02
	Pacific/Kiritimati			+14:00	None

13.	KZ	Kazakhstan

	Asia/Aqtau				 +4:00	E--Eur
	------------------------------------------------------------- 13.01
	Asia/Aqtobe				 +5:00	E--Eur
	------------------------------------------------------------- 13.02
	Asia/Alma--Ata				 +6:00	E-Eur

14.	MX	Mexico

	Mexico, Pacific
		America/Tijuana		 	 --8:00	Mexico
	------------------------------------------------------------- 14.01
	Mexico, Mountain
		America/Mazatlan	 	 --7:00	Mexico
	------------------------------------------------------------- 14.02
	Mexico, Central
		America/Mexico_City	 	 --6:00	Mexico

15.	NZ	New_Zealand

	Pacific/Auckland			+12:00	NZ
	------------------------------------------------------------- 15.01
	Pacific/Chatham				+12:45	Chatham

16.	PF	French_Polynesia

	Pacific/Tahiti				--10:00	None
	------------------------------------------------------------- 16.01
	Pacific/Marquesas			 --9:30	None
	------------------------------------------------------------- 16.02
	Pacific/Gambier				 --9:00	None

17.	PT	Portugal

	Atlantic/Azores				 --1:00	EU
	------------------------------------------------------------- 17.01
	Europe/Lisbon				 +0:00	EU

18.	RU	Russia

	Europe/Kaliningrad			 +2:00	Russia
	------------------------------------------------------------- 18.01
	Europe/Moscow				 +3:00	Russia
	------------------------------------------------------------- 18.02
	Europe/Samara				 +4:00	Russia
	------------------------------------------------------------- 18.03
	Europe/Yekaterinburg			 +5:00	Russia
	------------------------------------------------------------- 18.04
	Asia/Novosibirsk			 +6:00	Russia
	------------------------------------------------------------- 18.05
	Asia/Krasnoyarsk			 +7:00	Russia
	------------------------------------------------------------- 18.06
	Asia/Irkutsk				 +8:00	Russia
	------------------------------------------------------------- 18.07
	Asia/Yakutsk				 +9:00	Russia
	------------------------------------------------------------- 18.08
	Asia/Vladivostok			+10:00	Russia
	------------------------------------------------------------- 18.09
	Asia/Magadan				+11:00	Russia
	------------------------------------------------------------- 18.10
	Asia/Kamchatka				+12:00	Russia
	------------------------------------------------------------- 18.11
	Asia/Anadyr				+13:00	Russia

19.	SJ	Svalbard_&_Jan_Mayen

	Atlantic/Jan_Mayen (Svalbard)		 --1:00	None
	------------------------------------------------------------- 19.01
	Arctic/Longyearbyen			 +1:00	EU

20.	UA	Ukraine

	Europe/Kiev				 +2:00	EU
	------------------------------------------------------------- 20.01
	Europe/Simferopol			 +3:00	Crimea

21.	UM	US_minor_outlying_islands

	Pacific/Midway				--11:00	None
	------------------------------------------------------------- 21.01
	United_States, Samoa
		Pacific/Johnston		--10:00	None
	------------------------------------------------------------- 21.02
	Pacific/Wake				+12:00	None

22.	US	United_States

	United_States, Hawaii--Aleutian
		America/Adak			--10:00	US
		----------------------------------------------------- 22.01
		Pacific/Honolulu		--10:00	None
	------------------------------------------------------------- 22.02
	United_States, Alaska
		America/Anchorage	 	 --9:00	US
	------------------------------------------------------------- 22.03
	United_States, Pacific
		America/Los_Angeles	 	 --8:00	US
	------------------------------------------------------------- 22.04
	United_States, Mountain
		America/Denver		 	 --7:00	US
		----------------------------------------------------- 22.05
		America/Phoenix		 	 --7:00	None
	------------------------------------------------------------- 22.06
	United_States, Central
		America/Chicago		 	 --6:00	US
	------------------------------------------------------------- 22.07
	United_States, Eastern
		America/Indianapolis		 --5:00	None
		----------------------------------------------------- 22.08
		America/New_York	 	 --5:00	US

23.	ZR	Zaire

	Africa/Kinshasa				 +1:00	None
	------------------------------------------------------------- 23.01
	Africa/Lubumbashi			 +2:00	None