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MapRef.org: CRSGlossary by Stefan A. Voser
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Meridian
04.10.2011
A meridian is a line of constant
longitude
on a
mathematical earth model
.
A meridian is defined by a plane that contains the earth axis of the mathematical earth model.
The shape of a merdian of a sphere is a great circle and on an ellipsoid an ellipse.
A set of meridians and
parallels
with constant coordinate offsets defines a
graticule
.
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07.12.2017