Concial projection



Conic projections are a Map projection that is geometrically based on projecting the earth's surface on a cone that has been wrapped around the globe. When produced using the normal (and most common) polar aspect, meaning the tip of the cone lies directly over one of the earth’s poles, conic projections feature two main characteristics: meridians that converge at a pole and come together at a regular rate, and parallels that cross meridians at right angles with map distortion equal along the parallels. Conic projections have at least one standard parallel (map is tangent to the earth’s surface), but often have two surrounding the area being mapped to reduce distortion (map is secant to the earth’s surface). Due to their distortion pattern and location of standard parallels, conic projections are often used to map temperate areas of the world such as the United States, Europe, or Russia. Conical projections are best used to map relatively small areas because a small area map limits conical projection distortion.

Types of Conical Projections

 * Equidistant Conic projection


 * Lambert conformal conic


 * Lambert azimuthal equal-area projection


 * Albers conic


 * Polyconic Projections