In plane table surveying, Lehmann's rule are associated with:
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Solution of all type of resection problems
Method of resection after orientation by compass
Method of resection by two-point problem
Method of resection by three-point problem
Method of resection by three-point problem
Lehmann's method
• Locating the position of a plane table station with reference to three point is known as three-point problem.
• The trial and error method of three-point problem also known as Lehmann's method.
• The accuracy with which a plane table station can be located through three-point problem is known as its fix.
• In plane tabling failure of fix occurs when the plane table is on the great circle.
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