Which type of projections could be considered conical projections?

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Multiple Choice

Which type of projections could be considered conical projections?

Conical projections come from projecting the Earth's surface onto a cone and then unfolding that cone onto a plane. Distortion is managed best along the latitude where the cone touches the globe, called a standard parallel. The polyconic projection fits this idea directly: each meridian is projected from its own cone with the apex at the pole, so the construction is inherently conic, even though it uses multiple cones for different meridians. Lambert conformal conic is the classic example of a conic projection. It uses a single cone with two standard parallels, producing a conformal (angle-preserving) map along those latitudes. Bonne is often described as pseudocylindrical, but its geometry can be interpreted as a conic development in disguise. By viewing its construction through the cone-and-plane lens, you can recognize its conic origin. Because each of these can be understood as arising from projecting onto a cone (or from a conic development), they can all be considered conical projections.

Conical projections come from projecting the Earth's surface onto a cone and then unfolding that cone onto a plane. Distortion is managed best along the latitude where the cone touches the globe, called a standard parallel.

The polyconic projection fits this idea directly: each meridian is projected from its own cone with the apex at the pole, so the construction is inherently conic, even though it uses multiple cones for different meridians.

Lambert conformal conic is the classic example of a conic projection. It uses a single cone with two standard parallels, producing a conformal (angle-preserving) map along those latitudes.

Bonne is often described as pseudocylindrical, but its geometry can be interpreted as a conic development in disguise. By viewing its construction through the cone-and-plane lens, you can recognize its conic origin.

Because each of these can be understood as arising from projecting onto a cone (or from a conic development), they can all be considered conical projections.

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