Explain any two methods of overcoming chaining problem in the following cases: (i) the obstructi

step 1 Number 59, we are minimizing the distance it takes to go from point C1 to point C2. This is a lo

Explain any two methods of overcoming chaining problem in...

Key Concepts

Indirect Measurement Methods

To overcome the chaining problem, surveyors use indirect measurement techniques that involve bypassing the obstruction and later correcting the measured distances. Two common strategies include the offset or lateral chaining method and the use of triangulation. In the offset method, points are established on either side of the obstruction and additional cross?sight distances are measured; trigonometric relationships are then used to compute the true distance that would have been measured in a direct chain run. Triangulation, on the other hand, involves taking angle measurements from intermediate points and relating them to known distances, thus allowing the calculation of the inaccessible distance around the obstruction. Both methods effectively ‘bridge’ the gap caused by a pond or building, ensuring that the overall mapping or land measurement remains accurate.

Chaining in Surveying

Chaining is a fundamental technique in land surveying where distances on the ground are determined directly by using a physical chain or tape. In practice, surveyors lay out a series of connected chain lengths along a straight line to measure distances. However, when natural or man?made obstructions such as ponds or buildings lie along the intended line of measurement, the chaining technique cannot be applied directly. This situation is known as the chaining problem and requires alternative measurement methods to ensure accuracy.

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