Traverse Surveying Tutorial

Summary

This video guides viewers through the process of conducting a traverse survey. It covers crucial steps such as preparing the site, setting up survey equipment, and the basics of traversing. The presenters explain the importance of accurate measurements using tools like total stations and prisms. They demonstrate setting up stations, measuring bearings and distances, and performing calculations like mean bearing, distance, and closure. The video also covers the use of the bondage method for calculating accuracy and determining the class of the traverse based on linear misclosure, providing a comprehensive step-by-step overview for successful surveying.

Takeaways

• 😀 Ensure you gather all necessary information about your site before starting the traverse survey.
• 😀 Essential survey equipment includes two stations, three tripods, and two prisms—one for back bearing and another for forward bearing.
• 😀 Traversing is a surveying method where connected survey lines form the framework, and both direction and distance are measured using an angle measurement instrument and tape or electronic devices.
• 😀 There are two types of traverses: a close traverse, where the survey line forms a circuit and ends at the starting point, and an open traverse, where the survey line ends elsewhere.
• 😀 The purpose of traversing is to locate unknown points relative to each other and relate all points within the traverse to a common group.
• 😀 Setting up the station involves planting a nail, creating a new station, and positioning the total station over it for accurate measurements.
• 😀 Properly setting up a total station involves unscrewing the clamps, adjusting the leveling bubble, and ensuring it is centered over the station point using an optical plummet.
• 😀 Once the total station is in place and level, use the compass to set the assumed bearing and start measuring the distances and bearings between stations.
• 😀 For accuracy, always record the measurements for both face left and face right when measuring bearings and distances, then calculate the average values.
• 😀 The final step involves performing a bondage method calculation to determine the accuracy and linear misclosure of the traverse, with a ratio that classifies the traverse into first or second class.

Q & A

What is the first step in conducting a traverse survey?

The first step is to assess the site thoroughly and gather all necessary information before proceeding with the survey.

What equipment is required for a complete traverse survey?

A complete traverse survey requires two stations, three tripods, and two prisms—one for back bearing and the other for forward bearing.

What is the definition of traversing in surveying?

Traversing is a type of survey where a series of connected survey lines form a framework, with the direction and length of each line measured using instruments like an angle measurement tool, tape, or electronic distance measurement.

What is the difference between a close traverse and an open traverse?

A close traverse forms a complete circuit that ends at the starting point, while an open traverse does not return to the starting point and ends elsewhere.

What is the purpose of conducting a traverse survey?

The purpose of a traverse survey is to locate unknown points relative to each other and to determine the positions of all points within the traverse, all referencing a common origin.

What is the significance of targeting the optical plummet when setting up a total station?

Targeting the optical plummet is essential to ensure that the total station is perfectly aligned with the marked station point for accurate measurements.

What does the 'face left' and 'face right' concept mean in the context of a traverse survey?

The 'face left' and 'face right' refer to the two positions of the total station. When measuring, you alternate between these two positions to ensure accurate bearings and distances from both angles.

Why is it important to calculate the mean bearing and distance during the survey?

Calculating the mean bearing and distance helps to average the measurements from the face left and face right positions, providing a more accurate result for each survey line.

How is the misclosure of a traverse survey calculated?

Misclosure is calculated by comparing the measured bearings to the expected bearings and determining the discrepancy. This value is then corrected by dividing it evenly across all stations.

What is the final step after correcting the bearing and distance data in a traverse survey?

The final step is to calculate the adjusted latitude and departure values, then determine the final coordinates using these adjusted values.