Which projection preserves local shapes and angles, making it conformal?

• A. Equal-area Projection
• B. Cylindrical Projection
• C. Mercator Projection
• D. Azimuthal Projection

Answer: (C)

Conformality means preserving angles and the shape of small features at a point. The Mercator projection is designed to be conformal, so at any location the scale is the same in all directions. That makes tiny shapes look like their true shapes locally, even though their overall size is distorted—especially toward the poles where distances get stretched. This angle-preserving property is what makes it ideal for navigation, since bearings map to straight lines.

The other choices emphasize different properties: an equal-area projection keeps areas accurate but distorts shapes; an azimuthal projection focuses on preserving directions from a center point and isn’t generally shape-preserving everywhere; a cylindrical projection is a broad category, and not all cylindrical maps preserve shape (only specific conformal cases do, with Mercator as the classic example).