In which type of projection are distances true only from the center of projection or along a special set of lines?

• A. Equidistant
• B. Equal-area
• C. Rhumb line
• D. The dimensions of a sector

Answer: (A)

Distances are preserved only from the center of projection or along lines radiating from that center in an equidistant projection. This type is designed so the distance from the center to any point on the map is true (or proportional to true distance), and distances along straight lines through the center are also preserved. Distances between other points on the map aren’t kept accurate. The other options don’t describe this specific way of handling distance: equal-area focuses on preserving area, not distance; rhumb line is about lines of constant bearing for navigation, not a distance-preserving projection; and a nonstandard phrase like the dimensions of a sector isn’t a recognized projection type.