5) Which is the method used for locating contour points along the radial line from a common point at the centre?

6) Which instrument is used for tracing contour points directly in the field?

7) What method of contouring is used for small areas work with high precision?

8) Which method of contouring spot levels are taken along a series of lines laid over the area?

9) What is the another name of contouring by spot levels?