Question

Define the characteristics of Contours _________________.
A. Contour line must close , not necessarily in the limits of the plan.
B. Widely spaced contour indicates flat surface.
C. Closely spaced contour indicates steep slope ground.
D. All of the above.

Answer 1

Hint:
These are a series of lines representing mountains, valleys and landforms on maps.
If these lines are closely spaced, it means that the ground is very steep, which means that the ground is flatter if the contours are widely spaced.
These are used to understand the map and to know where steep or flat land is going to be.

Complete solution:
Contour lines on a map describing the intersection of a real or imaginary surface with one or more horizontal planes are curved, straight or a combination of both lines. The configuration of these contours makes it possible for map readers to infer a parameter's relative gradient and estimate the parameter at specific locations.
 The features of contour lines that assist in mapping or interpreting a contour map are as follows;
The contour lines must be closed, not even within the plan's limits.
The horizontal distance between each of the two contour lines shows the slope quantity, and the slope quantity varies inversely.
A flat surface is marked by a widely spaced outline.
A steep slope floor shows a closely spaced contour.
Some other characteristics:
Both points are of the same height on a contour line.
Except in the extreme case of an overhanging vertical cliff or wall, no two contour lines will meet or cross one another.
Close spaced lines of the contour suggest a steep slope
Extensively spaced lines of contour suggest a gentle slope
Uniform slope is shown by evenly spaced contour lines
Closed higher elevation contour lines towards the middle suggest hills
Option A is not the correct answer because the statement is the part of the answer, it is not the whole answer.
Option B is not the correct answer because the statement is the part of the answer, it is not the whole answer.
Option C is not the correct answer because the statement is the part of the answer, it is not the whole answer.
Option D is the correct answer because all the options are correct.

Hence, the correct answer is option .

Note:
Contour lines can either be traced on a visible three-dimensional surface model, such as when a photogrammetrist views elevation contours from a stereo model, or interpolated from the approximate surface elevations, such as when a computer programme threads contours through a network of region centroid observation points.