Fixed Points on Main Survey Lines

In civil engineering, surveying plays a crucial role in determining the position, shape, and dimensions of physical features on the Earth's surface. Survey lines are established to divide the land into smaller sections, and fixed points on these lines are used as reference points for future surveys. A line joining these fixed points on the main survey lines is referred to as a traverse.

Traverse in Surveying

Traverse is a term commonly used in surveying to describe a series of connected survey lines that form a closed figure or polygon. It involves measuring both the angles and distances between fixed points on the survey lines. By measuring these angles and distances accurately, surveyors can determine the positions of various points on the ground.

Establishing Fixed Points

Fixed points on the main survey lines are established to provide a stable reference for future surveys. These points are carefully selected based on their stability, visibility, and accessibility. They are typically marked with permanent markers or monuments, such as concrete pillars or metal rods, to ensure their long-term visibility and durability.

Importance of Fixed Points

Fixed points on main survey lines serve several important purposes in surveying:

1. Control Network: The fixed points form the backbone of a control network, which is a network of accurately surveyed points used as a reference for all other surveys in the area. The control network helps ensure the accuracy and consistency of subsequent surveys.

2. Baseline for Measurements: The fixed points on the main survey lines serve as a baseline for measuring distances and angles in subsequent surveys. By referencing these fixed points, surveyors can accurately locate and position various features on the ground.

3. Verification: Fixed points provide a means for verifying the accuracy of survey measurements. By re-measuring the distances and angles between fixed points, surveyors can check for any errors or discrepancies in their measurements.

4. Property Boundaries: Fixed points on main survey lines are often used to establish property boundaries. These points serve as reference markers for determining the exact boundaries of individual properties.

5. Future Surveys: By establishing fixed points on main survey lines, surveyors create a foundation for future surveys in the area. These points can be easily identified and referenced in subsequent surveys, enabling a consistent and reliable surveying process over time.

In conclusion, a line joining fixed points on the main survey lines is referred to as a traverse. These fixed points serve as reference markers and provide stability, accuracy, and consistency in surveying. They form the basis for control networks, baseline measurements, property boundaries, and future surveys.