And where the slope is shallow, the lines are far apart. If I add contours to the map, I can see where the hills are and how steep they are. Symbols are often similar on different types of map.

With the contouring engine in Elevation Pro, developers created a contoured based Production Cut and Fill Map. The contours provide data-based cut and fill with no need to interpret points.

But there will always remain a dedicated few happy to navigate their way by interpreting the contours of a 1:25000 topographical paper map complete with legend to indicate disused railways ...