Which grid system considers the portion of the earth between two selected parallels of latitude to be a horizontal slice of a cone?

• A. British Grid
• B. Transverse Mercator
• C. Orthomorphic
• D. World Polyconic

Answer: (B)

In this idea, a conic projection is used: the surface of the Earth between two chosen parallels of latitude is mapped onto a cone, so that that latitudinal band becomes a slice (a frustum) of the cone. The World Polyconic grid specifically implements this by using a series of cones for different latitude bands (polyconic), so each zone between two standard parallels is represented as that horizontal slice of a cone. That cone-based approach is what the question describes. The other options rely on cylindrical projections or general conformality rather than this latitude-band cone construction, so they don’t match the given description.