I thought to indicate longitudinal curvature using colour, shading convex slopes in red and concave in blue. Cross-sectional curvature is indicated with dots, which are white for diverging slopes and black for converging. Both of these are normalised by the square root of the segment area relative to the minimum segment area.
|Newquay in Cornwall. Convex slopes appear in red, concave in blue.|
|Cadair Idris. Some strongly curved areas create very large dots that fill entire segments above Llyn Cau|
|Rescaling the dots to half their radius.|