13) Tacheometric method of contouring the representative points are located by taking the staff readings of the wire in?

14) Which method of contouring is most accurate but slow and tedious?

15) Which method of interpolation is rapid, approximate result and used for small scale map?

16) Which method of interpolation of contour is laborious, tedious but most accurate?

17) What is the process of placing the contour lines proportionally between the plotted ground point is?