Structural Analysis
Structural Analysis
6th Edition
ISBN: 9781337630931
Author: KASSIMALI, Aslam.
Publisher: Cengage,
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The diagram illustrates a surveying setup using a total station instrument located at Control Point 20. The instrument takes a backsight (BS) to Control Point 22, with the azimuth from CP 20 to CP 22 known to be 215°55'00". The total station's horizontal angle is initially set to zero, allowing for accurate measurement of additional points.

Key details of the layout:

1. **Control Points and Coordinates:**
   - **Point 20:** Northing (N) = 13000.00, Easting (E) = 8000.00.

2. **Observed Points:**
   - **Point 23:** Located with a metered distance of 192.31’ and a total angle of 255°39'0".
   - **Point 24:** Located with a metered distance of 154.33’ and a total angle of 224°20'0".

3. **Azimuth Angles:**
   - The angle from CP 20 to CP 23 is measured as 255°39'0".
   - The angle from CP 20 to CP 24 is measured as 224°20'0".

The task is to determine the expected Northing and Easting coordinate values for points 23 and 24, given the known coordinate information for CP 20. This involves calculating the new point coordinates using direction and distance measured from the known position.

A compass indicator is included for orientation, showing cardinal directions.

The setup is a foundational exercise in understanding how to use a total station for surveying tasks, emphasizing the importance of precision in angle and distance measurement for accurate plotting of new location points.
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Transcribed Image Text:The diagram illustrates a surveying setup using a total station instrument located at Control Point 20. The instrument takes a backsight (BS) to Control Point 22, with the azimuth from CP 20 to CP 22 known to be 215°55'00". The total station's horizontal angle is initially set to zero, allowing for accurate measurement of additional points. Key details of the layout: 1. **Control Points and Coordinates:** - **Point 20:** Northing (N) = 13000.00, Easting (E) = 8000.00. 2. **Observed Points:** - **Point 23:** Located with a metered distance of 192.31’ and a total angle of 255°39'0". - **Point 24:** Located with a metered distance of 154.33’ and a total angle of 224°20'0". 3. **Azimuth Angles:** - The angle from CP 20 to CP 23 is measured as 255°39'0". - The angle from CP 20 to CP 24 is measured as 224°20'0". The task is to determine the expected Northing and Easting coordinate values for points 23 and 24, given the known coordinate information for CP 20. This involves calculating the new point coordinates using direction and distance measured from the known position. A compass indicator is included for orientation, showing cardinal directions. The setup is a foundational exercise in understanding how to use a total station for surveying tasks, emphasizing the importance of precision in angle and distance measurement for accurate plotting of new location points.
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