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3 cards from this section. Quick, good the night before a test.
What is parallax?
Think about how you see objects differently from various viewpoints.
What does a parallax bar measure?
Consider how we calculate elevation based on seen images.
What does the parallax bar measure?
Think about what the device is specifically designed to do.
True or False: Higher points have less parallax than lower points.
Recall the relationship between height and observed displacement.
A stereo pair photograph shows a known control tower height of 200 meters. If the parallax readings indicate a difference of 5 mm for a new building, what is the estimated height of the building?
Use the established relationships and examine similarities to find the new height.
You measure a parallax of 2 mm for a low hill. If the corresponding known elevation for the reference point is 80 meters, how would you calculate the approximate height of that hill?
Think about how minor changes in parallax help us calculate differences in height.
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