The 'traversing by radiation' (polar method) plots detail points by:
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Measuring angles only along a chain
Measuring angle and distance from traverse station to each detail point — polar coordinates converted to rectangular for plotting
Only for levelling between stations
Connecting two benchmarks
Correct Answer
B. Measuring angle and distance from traverse station to each detail point — polar coordinates converted to rectangular for plotting
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Radiation: from one traverse station, angles and distances to all nearby detail points measured. Polar coordinates (distance + bearing/angle) → convert to rectangular (ΔN, ΔE). Advantage: can plot any number of detail points quickly. Suitable for: open terrain. Limitation: error in station position propagates to all detail. Used with total station (tachymetry) for rapid detail survey.
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