Which term is the science of creating maps from photographs?

• A. Protractor
• B. Photogrammetry
• C. Pull-u
• D. Photolitography

Answer: (B)

Photogrammetry is the science of creating maps from photographs. It relies on overlapping photos—often taken from aircraft, drones, or ground surveys—to measure distances and elevations. By analyzing how a point shifts between photos taken from slightly different positions (parallax), you can reconstruct the three-dimensional layout of the terrain. This geometric information lets cartographers produce accurate maps and even 3D models. Modern photogrammetry also uses software to automatically match features across images and refine measurements for precision.

The other terms don’t describe this process. A protractor is simply an instrument for measuring angles on a flat surface. Photolithography refers to patterning materials with light in microfabrication, not mapping from photos. And pull-u isn’t a recognized term in this context.