Ralph Street of the Orienteering Team of Great Britain, talks about using the technique of simplification, or finding the biggest, most obvious features in the terrain to help decide and secure your route.

Finding simple, unique features allows for faster running as the cognitive load is less with fewer visual cues to worry about.

Ralph talks too about using a more filtered view of contour lines, picking out which ones are showing which distinctive features and then ignoring the rest.

Great video!