A world map is a map of the surface of the Earth, which may be made using any of a number of different map projections. A map projection is any method of representing the surface of a sphere or other three-dimensional body on a plane.
World maps form a distinctive category of maps due to the problem of projection. Maps by necessity distort the presentation of the earth's surface. Distortions reach extremes in a world map. The many ways of projecting the earth reflect diverse technical and æsthetic goals for world maps.
World maps are also distinct for the global knowledge required to construct them. A meaningful map of the world could not be constructed before the European Renaissance because less than half of the earth's coastlines, let alone its interior regions, were known to any culture. New knowledge of the earth's surface has been accumulating ever since and continues to this day.
Maps of the world generally focus either on 'political' features or on 'physical' features. Political maps emphasize territorial boundaries and human settlement. Physical maps show geographic features such as mountains, soil type or land use. Geological maps show not only the surface, but characteristics of the underlying rock, fault lines, and subsurface structures.
Read more about World Map: Projections, Thematic, Historical
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