Which term describes a photograph set that uses three wide-angle lenses to capture broad coverage?

• A. Terrestrial Photogrammetry
• B. Trimetrogon Photograph
• C. Aerial Photogrammetry
• D. Composite Photograph

Answer: (B)

The concept being tested is a multi-camera aerial photography setup designed to maximize ground coverage in one pass. A trimetrogon photograph refers to a set taken with three wide-angle cameras mounted together: one pointing straight down and two angled to capture the sides. This arrangement yields broad, overlapping coverage across a wide swath, which is especially useful for creating accurate maps and stereo models in photogrammetry.

This term is specific to that three-camera, wide-angle configuration. The other terms describe different ideas: terrestrial photogrammetry is ground-based; aerial photogrammetry covers aerial imagery in general (not defined by a three-camera trio); and a composite photograph is simply multiple images stitched together without the particular three-camera setup.