85. The best method of interpolation of contours, is by
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86. For preparation of a contour plan for a route survey
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87. Accuracy of elevation of various points obtained from contour map is limited to
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88. While surveying a plot of land by plane tabling, the field observations
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89. The instrument which is used in plane tabling for obtaining horizontal and vertical distances directly without resorting to chaining, is known as
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90. The operation of revolving a plane table about its vertical axis so that all lines on the sheet become parallel to corresponding lines on the ground, is known
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91. In setting up a plane table at any station
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