MAP PROJECTION

A way to represent the curved surface of the earth on the flat surface of a map Map projection depends on the scale of the map, purpose Map projection varies with the size and location of different areas on the earth’s surface Transferring globe-on a plane surface –preservation of area, shape, bearing(direction and distance) MAP PROJECTION

Equal area or homographical projections Correct shape or orthomorphic projections True bearing or azimuthal projections Groups of projections according to the quality they preserve

1.Perspective 2. Non-perspective Based on the developable surface used 1.Conical 2.Cylindrical 3.Azimuthal or zenithal 4.Conventional Based on the method of constructions

Homolographic or equal area Orthomorphic Azimuthal or true bearing projections Based on the position of tangent surfaces 1.Polar 2.Equatorial or normal 3.Oblique Based on the preserved qualities

Polar projection

Gnomonic Stereographic Orthographic Based on Geometric shape 1. Rectangular 2. Circular 3. Elliptical 4. Butterfly shape Based on the position of view or light

Elliptical Rectangular Butterfly shape

Zenital projection Conical projection Cylindrical projection Map scales

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