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2 cards from this section. Quick, good the night before a test.
What is the first step in measuring the height of a tower?
Recall the importance of line of sight.
Define vertical angle.
Think about angles in elevation.
What formula do you use to find height above the instrument axis?
Consider which equation defines the height.
True or False: The distance D is not necessary to calculate height.
Recall the relationship between angle, height, and distance.
You are standing 50 meters from a building. The vertical angle to the top is measured at 35 degrees. If your instrument is 1.8 meters above the BM, calculate the height of the building.
First, find the height above the instrument axis.
If the instrument is set up at two points 100 meters apart on level ground, measuring the heights of two towers with angles of 20° and 25° from each point, how do you calculate the height of the towers?
You will need to consider the different positions and angles when calculating each height.
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