PRISMATIC COMPASS SURVEY
Basic terms used in compass survey
Introduction to the basic terms used in compass survey.
Instrument and its setting up
Overview of the prismatic compass instrument and how to set it up for surveying.
Bearing of lines
Understanding bearings including Meridian–True, Magnetic, and Arbitrary. Bearing– fore bearing, Back bearing, Whole circle bearing, Quadrantal bearing system and Reduced bearing, Conversion of bearings, finding include dangles from bearings.
Prismatic Compass
Components, construction, and use of the prismatic compass in surveying.
Local attraction
Causes, precautions to be taken to avoid and correction of bearings affected due to local attraction, calculation of included angles.
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