What is the term for the method of representing the curved Earth on a flat map?

• A. Map Projection
• B. Coordinate System
• C. Datum
• D. Scale

Answer: (A)

The method of representing the curved Earth on a flat map is map projection. A projection is the process of translating points from the globe onto a plane, and because a sphere or ellipsoid cannot be laid out flat without distortion, every projection changes some aspect of the geometry—shape, area, distance, or direction. The choice of projection determines which properties are preserved best and which are distorted. For example, some projections keep shapes accurate locally but stretch areas near the poles, while others keep areas proportional but distort distances or shapes elsewhere. Related concepts include the datum, which provides the reference shape of the Earth used by maps, the coordinate system, which gives a grid (like latitude and longitude) to locate points, and scale, which relates map distances to real-world distances.