Difference between revisions of "Somosomo, Fiji"

From Geohashing
imported>Benjw
m (Taveuni, Fiji moved to Somosomo, Fiji: Renaming by town & country, as per Naming conventions, instead of island and country.)
imported>Benjw
(expand and rewrite graticule page)
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{{graticule
 
{{graticule
|map = <map lat="-16" lon="-179" />
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  | map = <map lat="-16" lon="-179" />
| ne = [[Pacific Ocean]]
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  | nw = [[-15,179]]
|  e = [[Pacific Ocean]]
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  | n  = [[-15,-179]]
 +
  | ne = [[-15,-178]]
 +
  | w = [[-16,179]]
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  | name = [[Somosomo, Fiji|Somosomo]]
 +
  | e = [[-16,-178]]
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  | sw = [[-17,179]]
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  | s  = [[-17,-179]]
 +
  | se = [[-17,-178]]
 
}}
 
}}
{{note|The graticule map appears to be buggy for location -180, and the google maps data is also incomplete}}
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This graticule is located at [[-16,-179]]. [http://irc.peeron.com/xkcd/map/map.html?date={{LOCALYEAR}}-{{LOCALMONTH}}-{{LOCALDAY2}}&lat=-16&long=-179&zoom=9&abs=-1 Today's location]
  
Taveuni is the third largest island of Fiji in the Pacific, and is one of the few places where the 180th meridian crosses land. However, unlike the prime meridian, the neighbouring geohashes are NOT mirrored around the line. Rather, geohash algorithm meridians are at 30W and 180. ie, you use the different 30W formula adjustment on each side of the line - allowing for  neighbouring hashpoints to potentially be VERY close. (someone else can work out the odds for two graticule points to land on Taveuni for the same day)
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Somosomo is the largest urban area on the island of Taveuni, the third largest island of Fiji.  The island is one of the few places where the 180th meridian crosses land, just to the west of Somosomo itself.
  
A good example of this is the 12th May 2008, as shown below...
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Because of the [[30W Time Zone Rule]], neighbouring graticules' geohashes are NOT mirrored around the 180th meridian, unlike at the prime meridian, as the different 30W rules are used on each side of the line.  However, this does not prevent neighbouring hashpoints being arbitrarily close.  The chance of a hashpoint falling on Taveuni in the Somosomo graticule is about 2%, and in the next graticule to the west about 1.5%. Because of the 30W rule these probabilities are independent, so in theory every ten years or so the island will have the distinction of two land hashpoints on the same day.
  
* http://irc.peeron.com/xkcd/map/map.html?date=2008-05-12&lat=-17&long=-179&zoom=9&abs=1
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For retrohashes, the position is different, as before 24 May 2008 the 180th meridian ''did'' mirror neighbouring hashpoints.  A near-miss example was on 12 May 2008, as shown in these maps:
 +
* http://irc.peeron.com/xkcd/map/map.html?date=2008-05-12&lat=-17&long=-180&zoom=9&abs=1
 
* http://irc.peeron.com/xkcd/map/map.html?date=2008-05-12&lat=-17&long=179&zoom=9&abs=1
 
* http://irc.peeron.com/xkcd/map/map.html?date=2008-05-12&lat=-17&long=179&zoom=9&abs=1
  
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[[Category:Inactive graticules]]
 
[[Category:Fiji]]
 
[[Category:Fiji]]

Revision as of 17:07, 2 June 2009

-15,179 -15,-179 -15,-178
-16,179 Somosomo -16,-178
-17,179 -17,-179 -17,-178

[[Category:Meetup in {{{lat}}} {{{lon}}}| ]]

This graticule is located at -16,-179. Today's location

Somosomo is the largest urban area on the island of Taveuni, the third largest island of Fiji. The island is one of the few places where the 180th meridian crosses land, just to the west of Somosomo itself.

Because of the 30W Time Zone Rule, neighbouring graticules' geohashes are NOT mirrored around the 180th meridian, unlike at the prime meridian, as the different 30W rules are used on each side of the line. However, this does not prevent neighbouring hashpoints being arbitrarily close. The chance of a hashpoint falling on Taveuni in the Somosomo graticule is about 2%, and in the next graticule to the west about 1.5%. Because of the 30W rule these probabilities are independent, so in theory every ten years or so the island will have the distinction of two land hashpoints on the same day.

For retrohashes, the position is different, as before 24 May 2008 the 180th meridian did mirror neighbouring hashpoints. A near-miss example was on 12 May 2008, as shown in these maps: