One of the mysteries of the English language finally explained.
Short parallel lines used in hill-shading on maps, their closeness indicating steepness of gradient.
- ‘For example, British cartographers favoured showing height by means of contour lines while the French preferred hachures.’
- ‘A map drawn with contours contains all of the information that a map with hachures and tinting has, plus it contains elevations.’
- ‘In the background hachures and shading are used to represent the value of the current velocity.’
- ‘You may be able to work around the problem by turning off the hachures for all contours except the innermost closed contour.’
- ‘Although thicker hachures indicate steeper slopes, hachure density remains constant throughout the map area except in areas of gentle slope.’
Mid 19th century: from French, from hacher (see hatch).
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