Basics of the map legend

Yellow = open areas

White to green = forest (from easy to pass through to almost impassable)

Blue = wet features

Purple = the course

Brown = contour features

Black = rocks & cliffs, and man-made features

For more details go to:
International Specification for Orienteering Maps (ISOM) or
International Specification for Sprint Orienteering Maps (ISSOM) - used for orienteering maps at larger scales.