Question

The curvature of the earth's surface is taken into account if the extent of survey is more than

• A. 160 km${}^2$
• B. 260 km${}^2$
• C. 500 km${}^2$
• D. 100 km${}^2$

Answer 1

The correct option is B 260 km${}^2$

For survey upto 195.5 km${}^2$ in an area, plane surveying do not result in much discrepancy. Above this limit, curvature of the earth's surface should be taken in account. Since our options do not consist this value, option (d) is selected.