Do you know : Orienteering is a truly global sport. If you are on a holiday and participate in any orienteering event if available. The understanding of Orienteering maps and the control description is universal and standardize world wide. The International Orienteering Federation (IOF) is the international governing body of the sport of orienteering. The IOF governs four orienteering disciplines: foot orienteering, mountain bike orienteering, ski orienteering, and trail orienteering. The IOF was founded in 1961 and recognised by the International Olympic Committee (IOC) in 1977. More informations about IOF can be found at https://orienteering.org/
Classic orienteering involves a race between controls in a preset order. The winner is the person who completes the course in the shortest time. You must visit the controls in the sequence shown in your map, different categories have a different map, do not follow any other racer during the course.
Competitors visit as many controls as possible within a time limit. There is usually a mass start (rather than staggered), with a time limit. Controls may have different point values depending on difficulty, and there is a point penalty for each minute late. The competitor with the most points is the winner.
Control points are placed on features on the map that can be clearly identified on the ground. Control points are marked in the terrain by white and orange “flags”.
Competitors receive a “control description sheet” or “clue sheet” which gives a precise description of the feature and the location of the kite, e.g., boulder, 5m, north side. For experienced orienteers, the descriptions use symbols (pictorial), in accordance with the IOF Control descriptions.
You can find more detailed information on the control description here –
Triangle : Represent the start location
Circle : The centre of the circle demarks the control location
Double Circle : Represent the Finish location, in some instead START and FINISH could be at the same location
Purple Line: This is a classific orienteering format, You must visit the control in this order, it does not shows you how to run to the control.