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7.1 - OS Maps

Ordnance survey - Skills

Scale The relationship between a distance on the map and the corresponding distance on the ground.
Easting The vertical co-ordinate.
Northing The horizontal co-ordinate.
Cardinal The 4 main points of a compass.
Green This colour indicates lowland areas up to 200 metres in altitude on a map.
Brown This colour represents upland areas on a map.
Triangulation pillars These can be found at the top of a hill or mountain.
Contours Lines on a map that join places of equal height.
Spot heights These give the exact height of a point.
Steep These slopes are indicated by contours that are tightly packed.
Flat Land that is indicated by an absence of contours.
Cliffs Indicated by contours that are ‘on top of one another’.
Convex This slope is steep at the bottom and gentle at the top.
Concave This slope is gentle at the bottom and steep at the top.
Cross-section A slice across and through a landscape to show its shape or profile.
1 kilometre squared The area of each square on a 1:50000 scale OS map.
Created by: boconnor