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A thin circle marking a control point's centre.
Also known as: Control marking, Control point circle
On an orienteering map a control is marked by a circle whose centre, not whose ring, is the feature. The ring is deliberately drawn thin and broken where it would hide detail, because the map beneath it is what the competitor navigates by.
Marks the position of a control point, the centre of the circle being the exact feature rather than the ring itself.
Contexts: Maps
Is broken where it would obscure map detail, because concealing terrain to draw a control would defeat the purpose of the mark.
Contexts: Maps
Is numbered in the order the controls must be visited, and joined to its neighbours by straight lines that are not routes.
Contexts: Maps
A thin circle drawn over the map detail with a number beside it and straight lines joining it to the circles before and after.