Principal meridian: Difference between revisions

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[[Image:Meridians-baselines.png|thumb|500px|right| This BLM map depicts the principal meridians and [[baseline (surveying)|baselines]] used for surveying states (colored) in the PLSS.]]
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A [[meridian (geography)|meridian]] is an imaginary line on the Earth's surface from the [[North Pole]] to the [[South Pole]] that connects all locations with a given [[longitude]]. Each is half of a [[great circle]] on the Earth's surface.
[[Image:Pmmap.jpg|thumb|404px|right| This BLM map depicts the principal meridians and [[baseline (surveying)|baselines]] used for surveying states (colored) in the PLSS.]]
 
In the [[United States of America]] [[Public Land Survey System]], a '''principal meridian''' is the [[meridian]] line used for survey control in a large region, and which  divides townships between east and west. The meridian meets its corresponding [[baseline (surveying)|baseline]] at the point of origin, or '''initial point''', for the land survey. For example, the Mount Diablo Meridian, used for surveys in California and Nevada, runs through the summit of [[Mount Diablo State Park|Mount Diablo]].
In the [[United States]] [[Public Land Survey System]], a '''principal meridian''' is the principal north-south line used for survey control in a large region, and which  divides townships between east and west. The meridian meets its corresponding [[baseline (surveying)|baseline]] at the point of origin, or '''initial point''', for the land survey. For example, the Mount Diablo Meridian, used for surveys in California and Nevada, runs through the summit of [[Mount Diablo State Park|Mount Diablo]].


Often, meridians are marked with roads, such as the Meridian Avenue in [[San Jose, California]] and Meridian Road in [[Vacaville, California]], both on the Mount Diablo Meridian.
Often, meridians are marked with roads, such as the Meridian Avenue in [[San Jose, California]] and Meridian Road in [[Vacaville, California]], both on the Mount Diablo Meridian.
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[[Category:Geography Workgroup]]

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This BLM map depicts the principal meridians and baselines used for surveying states (colored) in the PLSS.

In the United States of America Public Land Survey System, a principal meridian is the meridian line used for survey control in a large region, and which divides townships between east and west. The meridian meets its corresponding baseline at the point of origin, or initial point, for the land survey. For example, the Mount Diablo Meridian, used for surveys in California and Nevada, runs through the summit of Mount Diablo.

Often, meridians are marked with roads, such as the Meridian Avenue in San Jose, California and Meridian Road in Vacaville, California, both on the Mount Diablo Meridian.

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