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Projection System


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Classification 
Potentially there exits an unlimited number of map projections possessing one property or the other. The natures of these properties are so complex that they often possess one or more common properties. There is no projection, which can be grouped, in a single class. Moreover, if one attempts to obtain a rational classification of map projection, it will be rather difficult to achieve it. There can be as many classifications as many bases.

Depending on different bases the following classifications may be suggested:

Basis Classes
1. Method of Construction 1. Perspective
2. Non-perspective
2. Preserved qualities 1. Homolographic / Equal Area
2. Orthomorphic / Conformal 
3. Developable surface area  1. Cylindrical
2. Conical
3. Azimuthal / Zenithal 
4. Conventional
4. Position of tangent surface 1. Polar
2. Equation/Normal
3. Oblique
5. Position of viewpoint or light 1. Gnomonic
2. Stereographic
3. Orthographic
4. Others

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