what is angular surveying?

General field operations performed by a surveyor include linear and angular measurements.

• Points on the ground and on a map are related to each other through a horizontal distance and a horizontal angle.
• Horizontal angular measurement is made between survey lines to determine the angle between the lines.
• A horizontal angle is the angle between two measured directions.
• Measurement of horizontal angle is used in traverse surveying and other types of surveying.
• A survey line can be plotted if its length and direction are known. So, it is necessary to measure linear measurement (length) and angular measurement (direction and horizontal angle) of a survey line.