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A pictorial description sheet.
Also known as: Control description sheet
The international pictorial symbols describing an orienteering control's position.
Describe the feature at which each orienteering control is placed and where on it the marker sits.
Contexts: Navigation, Maps
Pictorial rather than written so that one description sheet serves competitors of every language at an international event, which is the same requirement that produced the signal flags and the spelling alphabet.
Contexts: Navigation, Maps
Read by column position: a symbol's meaning depends on which column it sits in, so the same pictogram means different things in different places on the sheet.
Contexts: Navigation, Maps
A grid of small pictograms in numbered columns, each column a category — feature, appearance, dimensions, position — read across a row for one control.