Contour lines connect points of equal elevation and do not cross except at cliffs. Contour lines are numbered according to height above sea level and indicate different landforms - widely spaced lines signify flat land, circular lines mark round hills, closely spaced lines show steep slopes, bending inward lines define valleys, and irregular lines portray uneven terrain. A cross section profile diagrams height changes between two map points along a line, representing landforms like valleys, mountains, and hills depicted by contour lines.

1. Contour, Relief Feature
and Profile
Karma Sonam Rigdel

2. What is Contour?
• A contour is an imaginary line connecting places
of equal height above the sea level.

3. Characteristics of Contour
• Contour lines are numbered as per the height.
• Contour lines do not merge or cross one another except
in case of cliff.
• Difference in height between the successive contour lines
is the contour interval.

4. 1. Relief Features
• Widely spaced contour indicates flat surface

5. Circular contour indicates a round hill

6. Closely spaced contour indicates steep slope.

7. Inner bending contour indicates a valley

8. Irregular contours indicate uneven surface landform

9. 3. Cross Section Profile
• A diagram showing change in height along a line drawn between two points
on a map.
• It is drawn to represent landform depicted by contours.
• Cross section is drawn across physical features like valley, mountain range
and a hill.

10. The Procedures for drawing are: