What is the contour line: The contour line is the line that defines the shape from the outside, and it is an ideal technique for improving eye-hand coordination in drawing skills, and it is the first technique adopted by children to draw people, houses and trees, we see contour drawings everywhere, the contour line appeared in primitive times In the walls of caves and mountains.

Tools for drawing the contour line: drawing the contour depends on pencils and is the basis, and includes many tools; Charcoal sticks, soft brushes, paper and pastels, soft brushes and graphite pencils, as these tools are simple and inexpensive, the time of the drawing process ranges from 20 minutes to 90 minutes, each artist according to his skills, where the artist expresses the underlying feelings inside.

There are several different types of contour line drawing: blind contour drawing, where the artist draws a contour of a subject without looking at the paper, continuous contour drawing: done without picking up the pencil from the paper, by adopting one long line, modified contour: where the artist looks at me Paper only 10% of the time.

Intersecting contour lines: which are somewhat similar to the terrain in the drawing.
What about the characteristics of the contour lines? All points on the same line have the same height and value, and the contour that locks itself is either a top or a depression, but in the case of terrain, the contour lines are far from each other.

Contour Maps: The contour line: an imaginary line that passes through points that have a height on the surface of the earth measured from sea level.
As for its importance: 1- It is possible to read the different terrain phenomena through it.
2- A terrain sector can be drawn. 3- It is of great importance in the fields of engineering construction and military purposes. 4- It helps to see the shape of the earth in three dimensions to determine the areas of depression and height.

The contour line appeared in primitive times, used by cartoonists, it needs calm and the ability to focus, and it is one of the difficult arts that seeks to establish a strong relationship between the hand, the brain and the eye, and one of the most important characteristics of these lines: - All points on the contour line have the same level . The undulation of the contour lines indicates the existence of a series of highs and lows, used in most maps of atlases, wall maps, and other small-scale maps.