inversely proportional to the scale of the map
directly proportional to the flatness of ground
larger for accurate works
larger if the time available is more
contour line
horizontal equivalent
contour interval
contour gradient
2 m
5 m
10 m
20 m
A contour is not necessarily a closed curve.
A contour represents a ridge line if the concave side of lower value contour lies towards the higher value contour.
Two contours of different elevations do not cross each other except in case of an over hanging cliff.
All of the above statements are correct.
steep slope
gentle slope
uniform slope
plane surface