3.0 Introduction
What is a horizontal angle?
The lines of sight in angle BAC
Expressing horizontal angles
2. Horizontal angles are usually expressed in degrees. A full
3.0 Introduction |
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What is a horizontal angle? |
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| 1. In topography, the angle made by two ground lines is measured horizontally, and is called a horizontal angle. You may replace these ground lines by two lines of sight AB and AC. These lines of sight are directed from your eyes, which form the summit A of the angle BAC, towards permanent landmarks such as a rock, a tree, a termite mound, a telephone pole or the corner of a building. |
The lines of sight in angle BAC |
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Expressing horizontal angles |
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2. Horizontal angles are usually expressed in degrees. A full | ||