Which method uses small curve hill-shaped lines to indicate relief on small maps?

• A. Hachures
• B. Isopleth mapping
• C. Trachographic relief drawing
• D. Contour mapping

Answer: (C)

Relief on small maps can be effectively suggested with curved hill-shaped lines that trace the form of the terrain. This approach, known as trachographic relief drawing, uses a network of short, curved lines that mimic the contours of hills and valleys. The curves cluster where the terrain rises steeply and space out in flatter areas, giving a quick, readable impression of elevation without crowding the map with dense contour data. It’s particularly well-suited to small-scale maps because it conveys three-dimensional form with a handful of curves, balancing legibility and informativeness.

Other methods differ in how they represent relief. Hachures rely on short lines to indicate slope direction, often with a more angular or straight appearance; isopleth mapping uses lines of equal value for continuous data rather than explicit relief; contour mapping uses precise elevation contours, which can become cluttered on small maps. The curved-hill depiction of trachographic relief drawing uniquely emphasizes the terrain’s rounded shapes in a clear, compact way.