Chart; Data map
The graphical representation of quantitative data or qualitative data for a given geographic area (e.g., regional unemployment rate or type of crops grown).
Choropleth maps. In choropleth maps, the areas of the map are shaded or patterned in proportion to the value of the data to be displayed for a particular area.
Dot maps. These maps use equal sized dots to show the presence of a feature at a particular geographic location and thus display spatial distributions. A dot need not be restricted to a single occurrence; it may indicate any number of entities.
Proportional symbol maps. When drawing proportional symbol maps, a cartographer selects a symbol (e.g., a circle or a bar), places it at the spot on the map to which the data apply, and varies the symbol’s size from place...