A thematic map is a type of map that portrays the geographic pattern of a particular subject matter in a geographic area. This usually involves the use of map symbols to visualize selected properties
Edmond Halley's New and Correct Chart Showing the Variations of the Compass (1701), the first chart to show lines of equal magnetic variation.
In cartography, a map is a representation or abstraction of geographic reality. Maps are used for a wide range of purposes, including navigation, scientific research, governance, and warfare. A common
Thematic map
…A thematic map is a type of map that portrays the geographic pattern of a particular subject matter (theme) in a geographic area. This usually involves the use of map symbols to…
The Cantino planisphere, created ten years after Columbus's first voyage, included the Americas.