Commonly Used Map Projections: Cylindric, Conic, Planar & Pseudo-Cylindric (Especially for GATE-Geospatial 2022)

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The appearance of the projected grid will change quite a lot depending on the type of surface it is projected onto, how that surface is aligned with the globe, and where that imagined light is held.

The following show some of the projected graticules produced by projection equations in each category:

This Diagram Shows Categories of Map Projection

Cylindric Projection

Cylindric projection equations yield projected graticules with straight meridians and parallels that intersect at right angles.

Conic Projection

Conic projection yields straight meridians that converge toward a single point at the poles, parallels that form concentric arcs. The example is an Albers Conic Equal Area, which is frequently used for thematic mapping of mid-latitude regions.

Planar Projection

It also yields meridians that are straight and convergent, but parallel from concentric circles rather than arcs. Planar projections are also called azimuthal because every planar projection preserves the property of azimuthally, directions from one or two points to all other points on the map.

Pseudo-Cylindric Projection

Pseudo-cylindric projections are variants on cylindric in which meridians are curved. Example of a Sinusoidal projection

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