What is the projection called when the scale is the same in any direction at a point?

• A. Conformal
• B. Equal-distance
• C. Equal-area
• D. Isometric

Answer: (B)

The main idea is how scale behaves around a point on a map projection. If the scale is the same in every direction at a point, tiny shapes are stretched equally in all directions there, which means angles are preserved locally. This property is the hallmark of a conformal projection: it preserves local shapes by keeping the directional scale isotropic at each point, even though the overall scale can vary from point to point across the map.

So, the projection described by equal scaling in all directions at a point is conformal, because it ensures angles are preserved locally. Equal-distance would imply preserving distance from a central point along rays, which is a different constraint and doesn’t guarantee angle preservation. Equal-area focuses on preserving areas rather than shapes, and isometric would require exact distances everywhere, which isn’t achievable for a sphere-to-plane map.