The charts have a unit strongly stylized and standardized symbol of color, the black for devices
The charts have a unit strongly stylized and standardized symbol of color, the black for devices of rock, the objects made by chart and the devices linear like barriers, white for the clear ground, the brown one for forms of relief and cuttings, blue for water, yellows and greens which it is necessary that vegetation, and crimsons or the red marks the course orienteering. A chart is a matched single associative container which maintains a collection of principal pairs of value.