This document defines key map terminology:
- Compass rose shows the 8 points of the compass. Contours join places of equal height. Contour interval is the height difference between contours. Direction is shown using compass points with north always at the top. Four figure grid references help locate squares. Grid squares represent map areas. Height is measured in meters above sea level. The key explains map symbols. Layer colouring uses colors to show height. Maps show reduced scale representations of earth areas. North signs point north, usually at the top. Ordnance Survey maps are official UK maps. Plans are detailed maps of small areas. Points of compass give directions. Relief shows land shape and height. Scale links map distances to real distances.