Which map type uses the polyconic projection?

• A. Municipal Base Maps
• B. Projection Maps
• C. Regional Base Maps
• D. Cadastral Map

Answer: (C)

The polyconic projection is a conic approach designed to handle regions that stretch across a fair amount of latitude, projecting each parallel from its own cone. This makes it possible to keep shapes reasonably accurate over a broad north–south extent without heavy distortion in a single central zone. That balance is especially useful for regional maps, where the map covers more area than a single city or parcel but isn’t global in scope.

Regional base maps aim to represent a wider area with practical accuracy, so a projection like polyconic—well-suited for mid- to large-regional extents—fits that purpose. Municipal base maps and cadastral maps tend to rely on local coordinate systems suited for precise, small-area work, while a generic “projection map” label doesn’t specify the regional framing that polyconic provides.