Important Definitions in Prismatic Survey
Important Definitions in Prismatic Survey
IMPORTANT DEFINITIONS:
The Magnetic North (MN)
Our Earth has a magnetic axis inclined to the line of longitude, which divides the earth into two equal parts. This magnetic axis is the property that influences the needle of a compass. When a compass needle is allowed to swing freely and settle, it points to the northern pole of this axis, and the direction so indicated is referred to as the…
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