Science and art of preparing maps from photos

• A. Photogrammetry
• B. Orthodrome
• C. Loxodrome
• D. Uranography

Answer: (A)

Photogrammetry is the science and art of preparing maps from photographs. It uses overlapping photos, typically aerial, to extract precise measurements and 3D information about the terrain. By analyzing parallax between images and applying camera geometry—both interior and exterior orientation—surveyors can determine distances, elevations, and coordinates, then rectify and combine data to produce accurate maps or orthophotos. This approach is specifically about turning photographic data into reliable cartographic products, not about routes on a sphere or celestial mapping. For instance, orthodrome and loxodrome refer to navigation paths on the globe, while uranography relates to mapping the heavens; none describe the process of creating maps directly from photographs like photogrammetry does.