Practice Determination Of Height From Vertical Aerial Photographs (4.12) - Relief Displacement of a Vertical Photograph

Practice: Determination of Height from Vertical Aerial Photographs

Lesson 4.12Relief Displacement of a Vertical Photograph

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11 questions

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4 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
5 questions · about 3 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What is a stereo-pair?
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Think about how we perceive depth using two eyes.
Question 2.
Define parallax.
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Consider how you see objects from different positions.
3Question 3.
What is the primary purpose of using a parallax bar in aerial photography?
- To measure distances
- To determine parallax differences
- To enhance image quality
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Think about what it measures during the stereo image process.
4Question 4.
True or False: A higher elevation results in a smaller parallax measurement.
- True
- False
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Consider the relationship between height and parallax.
Question 5.
Given a known control point with an elevation of 100m, you measure a parallax difference of 8 mm at two points. Calculate the estimated height of the unknown point using heights and parallax relations.
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Look closely at the formula relating height and parallax before plugging values in!
Question 6.
If a photographer captures stereo-pairs with a tilt that you suspect may influence parallax measurements, outline how you can mitigate these errors.
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What adjustments could you make to account for tilt in your measurements?

7 more questions in this section. Enroll free to practise them all.