Types of Meridian

True meridian:

It is at a point a grade circle passing through the geographical north and south pole of earths surface.

Magnetic meridian:

It is a direction shown by a magnetic north when it is freely suspended.

Grid meridian:

It is a reference line established by state governments in the middle of the state for their projects in various departments.

Arbitrary meridian:

It is a local reference point taken for measurements.

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