ha·chure /n. hæˈʃʊər, ˈhæʃʊər; v. hæˈʃʊər/ noun, verb, -chured, -chur·ing.
1. one of a series of short parallel lines drawn on a map to indicate topographic relief.
2. shading composed of such lines; hatching.
verb (used with object) 3. Also, hatch. to indicate or shade by hachures.Also, hatchure.

[Origin: 1855-60; < F; see hatch, -ure]

Source: Dictionary.com.

It was an extreme close-up of an extremely old man, the contours of his face clearly defined by line and shade, hachures on a topographic map.

Source: White Teeth, Zadie Smith.