A technical or architectural drawing, especially one that emphasizes the geometry of the object rather than the appearance of depth.
Techniques for representing three-dimensional space on a two-dimensional surface.
Examples of projection2 include Mercator, cylindrical, sinusoidal, and Goode's.
Monmonier 1996, p. 8 Map projections, which transform the curved, three-dimensional surface of the planet into a flat, two-dimensional plane, can greatly distort map scale. Although the globe can be a true scale model of the earth, with a constant scale at all points and in all directions, the flat map stretches some distances and shortens others, so that scale varies from point to point.