Figure-ground (cartography)
Focus of attention on features in a map / From Wikipedia, the free encyclopedia
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Figure-ground contrast, in the context of map design, is a property of a map in which the map image can be partitioned into a single feature or type of feature that is considered as an object of attention (the figure), with the remainder of the map being relegated to the background, outside the current focus of attention.[1] It is thus based on the concept of figure–ground from Gestalt psychology. For example, in a street map with strong figure-ground contrast, the reader would be able to isolate and focus attention on individual features, like a given street, park, or lake, as well as layers of related features, like the street network.
Strong figure-ground contrast has been seen as a desirable goal of map design, because it helps the map reader to perceive distinct geographic phenomena in the map. This allows more complex composition techniques such as visual hierarchy to organize these phenomena into clear structures that help readers use the map for its intended purposes.