Intepretation of Aerial Imagery

Question 1

What is the definition of Photo Interpretation

Answer 1

The process of studying and gathering information required to identify the various cultural and natural features,

Question 2

What are important factors to consider when interpreting a feature?

Answer 2

• Shape
• Size
• Tone/Colour
• Texture
• Pattern
• Shadows
• Association/Site
• Time

Question 3

IS what you interpret dependant on what you see?

Answer 3

yes!

Question 4

How do you get an Increased Angular Field when taking aerial photos?

Answer 4

Lower Altitude

Question 5

Whats the effect of focal lengths?

Answer 5

Different focal lengths have different Angular Fields of View (AFOV)

Question 6

What does a larger AFOV lead too?

Answer 6

Larger AFOV = longer B/D which leads to increases in vertical exaggeration

Question 7

Principle Point?

How is it found?

Answer 7

Is the exact centre of a photograph.

Found by using adjacent fiducial marks.

Question 8

Define NADIR

Answer 8

Directly under the focal plane

Question 9

Relief displacement formula (D)?\

How can you find height form this?

Answer 9

D = r(h)/H

h = d(H)/r
r = distance from nadir
H = height of base of object
h = height above ground level of object

Question 10

Define Parallax?

Answer 10

The displacement of an object caused by the movement of the observer relative to that object.