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Beginning at each initial point a principle meridian was laid out.   Principle meridians are:                a)...

Beginning at each initial point a principle meridian was laid out.   Principle meridians are:

               a) Curved lines running east and west based on astronomic or true north

               b) True north-south lines run to the limits of the area to be covered

               c) True east-west lines run to the limits of the area to be covered

d) North-South lines based on magnetic north

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