---
title: "Define tilted photograph"
subject: "Surveying II"
chapter: 7
key: "semester_4/surveying_ii:define-tilted-photograph"
source: https://www.bctengineer.com/q/semester_4/surveying_ii/define-tilted-photograph
site: BCT Engineering
---

# Define tilted photograph

Surveying II · Chapter 7: Photogrammetry and Remote Sensing

- Asked in: 2069 Bhadra, 1 marks
- Video: [Important Terms in Aerial Photogrammetry](https://www.youtube.com/watch?v=MaoYKKGYBBg) — Salim K Tutorials
- Answer checked by Claude Opus 5.5 (high effort) on 2026-10-14
- Page: https://www.bctengineer.com/q/semester_4/surveying_ii/define-tilted-photograph
- Whole chapter: https://www.bctengineer.com/md/semester_4/surveying_ii/chapter-7

## Question

Define tilted photograph.

## Short answer

A tilted photograph is taken with the camera axis unintentionally inclined from the vertical by more than 3°. Its scale varies across the image and requires rectification before mapping use.

## Answer

A **tilted photograph** is an aerial photograph taken with the camera axis unintentionally inclined from the vertical by more than 3° (tilt up to about 3° is regarded as a vertical photograph). Its scale varies across the photo and it needs rectification before it can be used for mapping.

## Check yourself

The answer's key points as multiple-choice questions, with the correct option and why.

1. A tilted photograph has camera axis unintentionally inclined from vertical by:
   A. Less than 1 deg
   B. More than 3 deg
   C. Exactly 90 deg
   D. 0 deg
   Answer: B. Tilt up to about 3 deg is vertical; beyond it the photo is tilted. (Key point: Tilt threshold)

2. What differs tilted from oblique?
   A. Tilt is intentional
   B. No difference
   C. Oblique has no horizon
   D. Tilt is unintentional; oblique is intentional
   Answer: D. Tilted photos result from aircraft motion, not planning. (Key point: Intent)

3. A tilted photo needs:
   A. No correction
   B. Rectification before mapping
   C. Larger film
   D. More colour
   Answer: B. Its scale varies across the photo. (Key point: Consequence)