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Considered the following statements about the characteristics of contours - (1) Closed contour lines with higher values inside show a lake, (2) Contour is an imaginary line joining points of equal elevations, (3) Closely spaced contour lines indicate a steep slope. (4) Contour lines of equal height may not converge nor continue as one line but a single contour line may split into two lines Which of the statements given above are correct?

Considered the following statements about the characteristics of contours - (1) Closed contour lines with higher values inside show a lake, (2) Contour is an imaginary line joining points of equal elevations, (3) Closely spaced contour lines indicate a steep slope. (4) Contour lines of equal height may not converge nor continue as one line but a single contour line may split into two lines Which of the statements given above are correct? Correct Answer 2 and 3

Explanation:

Contour: A Contour line may be defined as an imaginary line passing through the points of equal elevation.

Characteristics of Contour line:

  • Closed contour lines with higher values inside show a hill.
  • The variation of the vertical distance between any two contour lines is assumed to be uniform.
  • To contour lines having the same elevations cannot unite and continue as one line. Similarly, a single contour cannot be split into two lines
  • The horizontal distance between any two contour lines indicates the amount of slope and varies inversely on the amount of slope.
  • The steepest slope of terrain at any point on a contour is represented along the normal of the contour at that point. They are perpendicular to ridge and valley lines where they cross such lines.
  • Contours do not pass through permanent structures such as buildings.
  • Contours of different elevations cannot cross each other (caves and overhanging cliffs are the exceptions).
  • Contours of different elevations cannot unite to form one contour (a vertical cliff is an exception). 
  • Equally spaced contour represents a uniform slope and contours that are well apart indicate a gentle slope.
  • Closely spaced contours indicate a steep slope.
  • Whereas in the case of depressions, lakes, etc the higher figures are outside and the lower figure is inside.

Related Questions

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