Talk:180th meridian

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End Meridian[edit]

This article cannot be named End Meridian because that name has no support whatsoever. It is a neologism which is unacceptable in Wikipedia. Wikipedia:Naming conventions requires, among other considerations, that the most common English name be used. You cannot create a name just to give some 'status' to a common name like the original name of this article, 180th meridian, or as Chris Dybala tried to justify, "To make the name more advanced like prime meridian". — Joe Kress 06:13, 31 December 2006 (UTC)

I agree!! If a "more advanced name" is desired, then the user could use "antimeridian," which can be found in the literature. "180th meridian" is the more common name, however, and should remain the title of the article. I will revert the move in about five days unless there is opposition. --Lasunncty 17:48, 13 January 2007 (UTC)
Page moved, per request. -GTBacchus(talk) 04:44, 1 February 2007 (UTC)


Not a country. . . .

Good point. I've edited the article accordingly. -GTBacchus(talk) 00:12, 3 February 2007 (UTC)

Article name[edit]

Following comment copied from User talk:Joe Kress#180th meridian article name:

Hi, I noticed that you prefer the article to be at 180th meridian as opposed to antimeridian, yet the edit summary says, "antimeridian depends on prime meridian". If this is the case, then would it not be better to name the article "antimeridian", since all the points on the antimeridian have an antipode on the prime meridian? Thanks.   Set Sail For The Seven Seas  357° 30' 00" NET   23:50, 3 August 2009 (UTC)

I regard both "antimeridian" and "prime meridian" as generic, not specific. An antimeridian is associated with every prime meridan listed in the Prime Meridian article. "Antimeridian" also refers to meridian opposite the meridian specified at Treaty of Tordesillas, which is not a prime meridian. — Joe Kress (talk) 22:30, 4 August 2009 (UTC)
I see, but half of the Prime Meridian article still specifically refers to the Greenwich Meridian, in particular, this, this and this. These parts should therefore be in an individual article labelled "Greenwich Meridian" or "Zero Meridian" as these sections refer to a specific meridian rather than a generic one.   Set Sail For The Seven Seas  342° 00' 00" NET   22:48, 4 August 2009 (UTC)
I see no good reason to rename this page. An antimeridian is simply the opposite of a meridian - so 90°E is the antimeridian of 90°W, etc - therefore "antimeridian" is potentially an ambiguous title. "180th meridian" is precise and unambiguous, assuming 0° is taken to be the Greenwich meridian, which these days it always is. A simple redirect from Antimeridian to 180th Meridian will suffice. Bazonka (talk) 18:21, 10 August 2009 (UTC)

United States[edit]

I'd like to point out that technically the anti-meridian also passes through the USA, as it cuts through the Aleutian Islands. (talk) 18:14, 27 March 2013 (UTC)

Map showing the meridian[edit]

I replaced the template instantiation {{Location map-line|lon=180}} with a map centered on the Pacific ocean, which makes the 180th meridian more obvious. It should be noted that, unlike what the template does, the red line and the label “180°” are now part of the image. This is not perfect. Ideally, the Template:Location map-line should be modified to allow this positioning of the map. I did not do it because the template is too complex for me to understand. If any one is willing to do it, I can upload a version of the map without the line and the label. — Edgar.bonet (talk) 12:46, 14 October 2015 (UTC)

Prime Meridian link[edit]

In the first sentence Prime meridian should be linked to IERS Reference meridian not the one in Greenwich. This is because the 180th meridian is not exactly opposite the greenwich observatory. The greenwich observatory is slightly west of the 0th meridian or as some people call the prime meridian or IERS Reference meridian. So the greenwich meridian is not 180 degrees east or west of the 180th meridian but the IERS Reference Meridian is. The Prime Meridian (Greenwich) article is mainly about a specific observatory on earth that is not opposite the 180th meridian. So thats 2 reasons it shouldn't be linked to Prime Meridian (Greenwich) but to IERS Reference meridian. Firstly its not opposite the 180th meridian and its about a place that is located near the Prime Meridian not at the Prime Meridian. Theultimateboss123 (talk) 15:27, 2 January 2017 (UTC)

It's worth noting that the 180th meridian existed way before the IERS. — Edgar.bonet (talk) 20:30, 2 January 2017 (UTC)
I don't see why it needs to be that specific. However you define the prime meridian, the 180th meridian is going to be exactly opposite. --Lasunncty (talk) 08:35, 3 January 2017 (UTC)
The Greenwich prime meridian and the IERS Reference Meridian are just two versions of the same thing: the Greenwich meridian is at 0° geographic longitude (the longitude relevant to celestial navigation), whereas the IERS meridian is at 0° geodetic longitude (the one relevant to satellite navigation). As for the link target, I propose Prime meridian#International prime meridian, as the “International prime meridian” is the real notion we are looking for, and that section covers both versions. — Edgar.bonet (talk) 09:43, 3 January 2017 (UTC)
Good choice. The link you suggest covers both the concept for which a reader is likely to be searching as well as an explanation for the more technical IERS. An encyclopedia is ment to be broadly useful, not merely pedantic. — Neonorange (talk) 13:01, 3 January 2017 (UTC)