Identify the photogrammetry term that is performed using ground-based cameras at known positions.

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

Answer: (A)

Terrestrial photogrammetry is the method that uses cameras on the ground at known locations to capture overlapping images. By analyzing the parallax between stereo pairs taken from fixed, measured ground positions, you can determine precise three-dimensional positions of objects and features in the scene. This approach is ideal for detailed measurements of structures, facades, or sites where ground-based control and accuracy are essential.

The other terms refer to methods or configurations that involve photography from above or different image-combination concepts. Aerial photogrammetry uses cameras mounted on aircraft or drones to map larger areas from above. Composite photograph describes a merged image rather than a specific measurement technique, and trimetrogon photograph refers to a three-photo aerial setup with vertical and oblique views.