Which lens type is described as the simplest for mapping and uses a single lens?

• A. Single Lens
• B. Lens
• C. Normal Angle Lens
• D. Wide Angle Lens

Answer: (A)

Mapping from imagery relies on a predictable geometric relationship between the scene and the image. A single-lens setup provides one center of projection, one focal length, and one image plane. That makes the camera model straightforward, so interior and exterior orientation parameters are easier to solve and the perspective projection is simple to apply. With a single lens you also avoid parallax issues from multiple viewpoints and, in many cases, deal with less distortion to correct, compared with wider-angle or complex multi-lens systems that require more extensive calibration and distortion modeling.

Other options describe lenses or systems that introduce more complexity or aren’t explicitly about using just one lens, so they don’t offer the same simplicity for mapping.