direct method
square method
cross-sections method
tacheometric method
Contour interval on any map is kept constant.
Direct method of contouring is cheaper than indirect method.
Inter-visibility of points on a contour map cannot be ascertained.
Slope of a hill cannot be determined with the help of contours.
depression
hillock
plain surface
none of the above
the vertical distance between two consecutive contours
the horizontal distance between two consecutive contours
the vertical distance between two points on same contour
the horizontal distance between two points on same contour
hypsometry
barometric levelling
spirit levelling
trigonometrical levelling