What are Hachures how it is represented?

The short lines of shading drawn on a map to show differences in the slope of the ground are known as Hachures.

When the slope is steep, the lines or hachures are thick and close together; when the slope is gentle, they are thinner and farther apart. The darkest portions of a hachures map, represent crags and very steep slopes, while the lighter shades show the gentler slopes; The white parts shows plateaux, very high level mountain tops, hillside shelves, or deep level valley bottoms. Such a map, hung at a distance from the eye, thus gives a fairly good impression of the land configuration