Aerial Photography – identify the incorrect statement about high oblique photographs Which of the following statements is incorrect regarding high oblique aerial photographs?

Introduction / Context:
Oblique aerial photographs are captured with the camera axis tilted away from the vertical. High oblique photographs, in particular, are intentionally inclined enough that the horizon appears in the image. Understanding these classes is important for reconnaissance, mapping limits, and relief displacement interpretation.

Given Data / Assumptions:

• High oblique implies a significant tilt (commonly up to a few tens of degrees).
• Horizon visibility is the distinguishing feature from low oblique photographs.
• Statements are assessed for general correctness used in photogrammetry instruction.

Concept / Approach:

Low oblique photos are tilted but do not show the horizon; high obliques do show the horizon. Typical tilts can reach around 30° (varies with altitude and lens). Because horizon inclusion is the defining characteristic of a high oblique, any statement claiming a high oblique may not include the horizon is incorrect.

Step-by-Step Solution:

Verification / Alternative check:

Training manuals classify obliques explicitly: low oblique (no horizon), high oblique (horizon visible). This confirms the status of each statement.

Why Other Options Are Wrong:

Options A, B, and E are consistent with accepted definitions; option D (“None of these”) is invalid because one statement (C) is indeed incorrect.

Common Pitfalls:

Confusing tilt magnitude with altitude effects; assuming any tilted photo is “high oblique” even if no horizon appears.

Final Answer:

They may not include the image of the horizon