8.4 Contour interval
The recommended contour interval is 2, 2.5 or 5 m. It must be the same all over the map. Parks and towns are often relatively flat, and the map maker should avoid "chasing" contour details. If a city base map (or similar) which often has 1 m interval, is used as base material, every second contour should be taken out in order to create a 2 m vertical interval.
