Shaded or marked with fine parallel lines or cross-hatching, typically in drawing, engraving, or mapmaking.
Past participle of hachure, from French hachurer (to shade with fine lines), derived from hache (axe), because the parallel lines resemble axe marks or strokes.
Cartographers use hachured shading on old maps to show terrain and elevation before modern color printing—the pattern and direction of the lines actually indicated slope direction, so trained map-readers could understand the landscape's shape just from the hatching.
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