Strange historic timezone in Nigeria

Hi, tz emailing list I have stumbled over a peculiarity in the historic data about Nigeria, the africa file contains: Zone Africa/Niamey 0:08:28 - LMT 1912 -1:00 - WAT 1934 Feb 26 0:00 - GMT 1960 1:00 - WAT Since the timezone abbreviation 'WAT' is the same seemingly for both GMT-1 and GMT+1, my suspicion is that it should rather be Zone Africa/Niamey 0:08:28 - LMT 1912 1:00 - WAT 1934 Feb 26 0:00 - GMT 1960 1:00 - WAT which would make more sense from the lunar mean time value ... As a side-question, I'm trying to determine a meaningful area for the timezones Atikokan and Nipigon, it seems to me that they would be small, like a US county for instance, but I can't find anything about it. It seems they most be within the larger areas Rainy River district and Thunder Bay district, but how would it look on a map? Regards, Jesper

From: Jesper Norgaard Welen Date: Mon, 30 Oct 2006 00:43:39 -0600 Subject: Strange historic timezone in Nigeria
As a side-question, I'm trying to determine a meaningful area for the timezones Atikokan and Nipigon, it seems to me that they would be small, like a US county for instance, but I can't find anything about it. It seems they must be within the larger areas Rainy River district and Thunder Bay district, but how would it look on a map?
Chris Walton put a lot of effort in researching the Canada situation. <http://www3.sympatico.ca/c.walton/canada_dst.html> Very detailed! And then there is of course the Matthews-Vincent 1998 article everybody refers to. It is quite possible that there is simply no more detail available....

Jesper, I understand your confusion in trying to draw time zone boundaries for Atikokan and Nipigon. The "Township of Atikokan" and the "Township of Nipigon" are municipalities in Northern Ontario. Both townships have official boundaries and are officially recognized as municipalities by the province. The "town" of Atikokan is the built up area (townsite) within the Township of Atikokan. The "town" of Nipigon is the built up area (townsite) within the township of Nipigon. Before reading further, please understand that there are both "geographical townships" and "municipal townships" in Ontario. A "geographic township" is an area of land (usually rectangular in shape) that was given a name by the land surveyors many years ago. A "municipal township" is a municipality with some local political structure and generally a small population. The municipality of the "Township of Nipigon" lies exactly within the boundaries of the Nipigon geographic township. Total area is 109.65 square km with a population density of 17.9 people per square km. The north half of municipality of the "Township of Atikokan" is comprised of the geographic townships of Schwenger and Freehorn. The south half of is comprised of an area that was not surveyed in the original Ontario land surveys. Total area of the municipality is 316.81 square km with a population density of 11.5 people per square km. Note: there isn't (and never was) a geographic township named "Atikokan". The time zone boundaries for both Atikokan and Nipigon should presumably follow the municipal township boundaries. The best way to get the boundaries would be from paper copies of the federal 1:50000 topographical maps. Here are some online maps that give a general idea of the areas involved: Atikokan: Look for the black square near the east end of the Rainy River district. http://www.mah.gov.on.ca/userfiles/page_attachments/Library/1/1652085_E_2006... Here is a more detailed map with some latitude and longitude markings. The Township of Atikokan is the larger of the two black squares in the center of the map. http://crownlanduseatlas.mnr.gov.on.ca/tilemaps/pdfs/_920485.pdf Nipigon: Look for the black rectangle south of Lake Nipigon http://www.mah.gov.on.ca/userfiles/page_attachments/Library/1/3519577_E_2006... Here is a more detailed map with some latitude and longitude markings. The Township of Nipigon is near the bottom of the map. http://crownlanduseatlas.mnr.gov.on.ca/tilemaps/pdfs/_890490.pdf If you are making a time zone map you have to decide whether to lump Quetico Provincial Park in with Atikokan. Quetico is a large wilderness park. At 4758 square kilometres it is more than ten times the size of Atikokan itself. It is mostly used by canoeists in the summer and cross country skiers in the winter. The head office for Quetico is inside the town of Atikokan. The park staff uses Atikokan time for official purposes. Campers, canoeists, skiers, etc. can use what ever time they wish. Also, if you are creating time zone maps for all of Canada, please be aware of recent changes in Quebec time legislation. If I understand the new legislation, the time zone boundary will no longer follow the 63rd meridian starting next year. See my notes in: http://www3.sympatico.ca/c.walton/canada_dst.html Let me know if you need any more info. If I come across any better maps I will let you know. -chris -----Original Message----- From: Oscar van Vlijmen [mailto:ovv@hetnet.nl] Sent: October 30, 2006 5:29 PM To: tz@lecserver.nci.nih.gov Subject: Re: Canada details
From: Jesper Norgaard Welen Date: Mon, 30 Oct 2006 00:43:39 -0600 Subject: Strange historic timezone in Nigeria
As a side-question, I'm trying to determine a meaningful area for the timezones Atikokan and Nipigon, it seems to me that they would be small, like a US county for instance, but I can't find anything about it. It seems they must be within the larger areas Rainy River district and Thunder Bay district, but how would it look on a map?
Chris Walton put a lot of effort in researching the Canada situation. <http://www3.sympatico.ca/c.walton/canada_dst.html> Very detailed! And then there is of course the Matthews-Vincent 1998 article everybody refers to. It is quite possible that there is simply no more detail available....

Thanks to Oscar for the input. Chris Walton has obviously put a big effort into the documentation site (page) you mention. However, my problem remains: how big is for instance the Nipigon timezone? We know that the center of Nipigon city must lie in the timezone, and the timezone must be equal to or (most certainly) less than the Thunder Bay District that contains Nipigon city http://en.wikipedia.org/wiki/Thunder_Bay_District%2C_Ontario but this page is of little help: http://en.wikipedia.org/wiki/Nipigon%2C_Ontario so I made my own little map of the Nipigon timezone, as good a guess as any I imagine, just painting an arbitrary circle around Nipigon city, from a map fraction taken from http://www.canadiangeographic.ca . I'm attaching that in the file Nipigon.zip which contains an image file Nipigon.jpg Can anyone guess better than that? I certainly hope so, because I'm not very happy with my guess, but I don't know how to improve it. Perhaps I could try to pin-point bigger cities surrounding Nipigon, for which we can assume they did not join the Nipigon timezone, and then make a border that goes midways between these cities and Nipigon itself. That would be a bit more reasonable approach. If anyone can help me, I would really appreciate it. Regards, - Jesper -----Original Message----- From: Oscar van Vlijmen [mailto:ovv@hetnet.nl] Sent: Lunes, 30 de Octubre de 2006 16:29 To: tz@lecserver.nci.nih.gov Subject: Re: Canada details
From: Jesper Norgaard Welen Date: Mon, 30 Oct 2006 00:43:39 -0600 Subject: Strange historic timezone in Nigeria
As a side-question, I'm trying to determine a meaningful area for the timezones Atikokan and Nipigon, it seems to me that they would be small, like a US county for instance, but I can't find anything about it. It seems they must be within the larger areas Rainy River district and Thunder Bay district, but how would it look on a map?
Chris Walton put a lot of effort in researching the Canada situation. <http://www3.sympatico.ca/c.walton/canada_dst.html> Very detailed! And then there is of course the Matthews-Vincent 1998 article everybody refers to. It is quite possible that there is simply no more detail available....

Jesper, About an hour before you sent your e-mail titled "Nipigon timezone" I sent an e-mail which hopfully has all the answers you are looking for. Subject of the my e-mail was "Re: Canada details". Make sure you have a look and let me know if you have questions. -chris -----Original Message----- From: Jesper Norgaard Welen [mailto:jnorgard@prodigy.net.mx] Sent: Tue 10/31/2006 1:20 AM To: TZ-list Cc: Paul Eggert Subject: Nipigon timezone Thanks to Oscar for the input. Chris Walton has obviously put a big effort into the documentation site (page) you mention. However, my problem remains: how big is for instance the Nipigon timezone? We know that the center of Nipigon city must lie in the timezone, and the timezone must be equal to or (most certainly) less than the Thunder Bay District that contains Nipigon city http://en.wikipedia.org/wiki/Thunder_Bay_District%2C_Ontario but this page is of little help: http://en.wikipedia.org/wiki/Nipigon%2C_Ontario so I made my own little map of the Nipigon timezone, as good a guess as any I imagine, just painting an arbitrary circle around Nipigon city, from a map fraction taken from http://www.canadiangeographic.ca . I'm attaching that in the file Nipigon.zip which contains an image file Nipigon.jpg Can anyone guess better than that? I certainly hope so, because I'm not very happy with my guess, but I don't know how to improve it. Perhaps I could try to pin-point bigger cities surrounding Nipigon, for which we can assume they did not join the Nipigon timezone, and then make a border that goes midways between these cities and Nipigon itself. That would be a bit more reasonable approach. If anyone can help me, I would really appreciate it. Regards, - Jesper -----Original Message----- From: Oscar van Vlijmen [mailto:ovv@hetnet.nl] Sent: Lunes, 30 de Octubre de 2006 16:29 To: tz@lecserver.nci.nih.gov Subject: Re: Canada details
From: Jesper Norgaard Welen Date: Mon, 30 Oct 2006 00:43:39 -0600 Subject: Strange historic timezone in Nigeria
As a side-question, I'm trying to determine a meaningful area for the timezones Atikokan and Nipigon, it seems to me that they would be small, like a US county for instance, but I can't find anything about it. It seems they must be within the larger areas Rainy River district and Thunder Bay district, but how would it look on a map?
Chris Walton put a lot of effort in researching the Canada situation. <http://www3.sympatico.ca/c.walton/canada_dst.html> Very detailed! And then there is of course the Matthews-Vincent 1998 article everybody refers to. It is quite possible that there is simply no more detail available....

Jesper Norgaard Welen <jnorgard@prodigy.net.mx> writes:
Zone Africa/Niamey 0:08:28 - LMT 1912 -1:00 - WAT 1934 Feb 26 0:00 - GMT 1960 1:00 - WAT
Since the timezone abbreviation 'WAT' is the same seemingly for both GMT-1 and GMT+1, my suspicion is that it should rather be
Zone Africa/Niamey 0:08:28 - LMT 1912 1:00 - WAT 1934 Feb 26 0:00 - GMT 1960 1:00 - WAT
No, "WAT" is used for both -0100 and +0100. Very strange, but there's commentary about this issue in the "africa" file. The offsets faithfully reflect Shanks (the "WAT" is my own invention).
participants (4)
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Chris Walton
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Jesper Norgaard Welen
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Oscar van Vlijmen
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Paul Eggert