Objective of photo-interpretation in remote sensing In the context of aerial and satellite imagery, state the principal objective of photo-interpretation.

Introduction / Context:
Photo-interpretation converts imagery into meaningful geographic information. Interpreters rely on tone, texture, shape, size, pattern, shadow, and context to recognise and classify features, and to derive insights about processes, land use, and change detection.

Given Data / Assumptions:

• Aerial or satellite images are available.
• Interpreter applies visual keys and ancillary data.
• Goal: transform pixels into thematic information.

Concept / Approach:
Photo-interpretation involves a progression: detection, recognition, identification, and evaluation. After locating features, interpreters assign labels (identification) and assess significance (e.g., hazard, suitability, trend), often cross-checking with ground truth or higher resolution data.

Step-by-Step Solution:

Verification / Alternative check:
Accuracy assessment with confusion matrices and field checks validates that recognition and identification steps were performed correctly.

Why Other Options Are Wrong:

• identification alone: misses recognition and evaluation.
• recognition alone: insufficient without labelling.
• judging significance alone: not possible without first recognising and identifying.
• None of these: incorrect because all are true components.

Common Pitfalls:
Overreliance on a single cue (e.g., tone), ignoring seasonal effects, and neglecting scale/resolution when assigning classes.

Final Answer:
All of these