Which photogrammetric method uses photographs taken at an angle to the ground?

• A. Photostat
• B. Oblique Photography
• C. Stereoscopic Vision
• D. Photolithography

Answer: (B)

Oblique photography involves taking images with the camera tilted away from the ground, so features are shown in perspective rather than as a flat plan. In photogrammetry, this angled view provides context and detail that vertical shots may not, such as the facades of buildings and the relationship between objects, though it comes with varying scale across the image. This makes oblique photographs the natural choice when the goal is to view terrain and structures in their real-world relationships from the air. The other terms refer to different concepts: a copy-focused process, a depth-perception method using two images, and a semiconductor fabrication technique, none of which define photographs taken at an angle to the ground.