MASTEREDGE ACADEMY

@masteredgeacademy

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MasterEdge Academy

Discipline. Learning. Precision. Mastery. M – Mapping & Machine Learning A – Analytics (Data) S – Software & Surveying T – Training & E – Education R – Resources

2 videos

Why it worked

The video effectively uses animation to visually demonstrate a technical surveying concept, breaking down complex calculations into understandable steps. The clear on-screen text and logical progression make it an accessible educational resource.

Summary

This animated video from MasterEdge Academy explains the process of leveling in surveying, demonstrating how to take Backsight (BS), Intermediate Sight (IS), and Foresight (FS) readings. It then shows how to calculate the Height of Instrument (HI) and Reduced Level (RL) for different points using these readings.

Structure

1Introduction to leveling and the role of MasterEdge Academy
2Taking a Backsight (BS) reading on a known TBM
3Taking Intermediate Sight (IS) readings on new points
4

Original caption

Understanding Leveling & Its Calculations - Part 1 How does leveling work in surveying? And how do you calculate HI and RL from your field readings? In this Part 1 tutorial, we go from the field observation to the actual calculations. You’ll see how a surveyor takes: ➡️ BS = 1.20 m on a TBM ➡️ IS = 1.16 m at Point 1 ➡️ IS = 2.01 m at Point 2 ➡️ FS = 1.90 m at Point 3 Then we calculate: HI = RL + BS and RL = HI − IS/FS By the end, you’ll understand why the HI remains constant when the instrument stays in the same position, while different staff readings produce different RLs. #survey #level #student #masteredgeacademy

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Product placement

MasterEdge Academy (ACTS): Provides training and educational resources in surveying. Removing it would change the context of the video, as it's the creator and provider of the educational content.

On-screen text

MASTEREDGE ACADEMY BACK SIGHT (BS) BS = 1.20 m BS IS FS HI RL REMARK 1.20 98.20 TBM 1.16 2.01 1.90 UNDERSTANDING LEVELING - PART 1 CALCULATING HI AND RL BS IS FS HI RL REMARK 1.20 99.40 98.20 TBM 1.16 98.24 Point 1 2.01 97.39 Point 2 1.90 97.50 Point 3 1. HEIGHT OF INSTRUMENT (HI) FORMULA: HI = RL + BS THEREFORE: HI = 98.20 + 1.20 HI = 99.40 m HI is the height of the line of sight from the instrument. 2. CALCULATING RL OF EACH POINT POINT 1 (Using IS) FORMULA: RL = HI - IS RL = 99.40 - 1.16 RL = 98.24 m POINT 2 (Using IS) FORMULA: RL = HI - IS RL = 99.40 - 2.01 RL = 97.39 m POINT 3 (Using FS) FORMULA: RL = HI - FS RL = 99.40 - 1.90 RL = 97.50 m THE TEACHING MOMENT Notice something important: The HI remains 99.40 m because we haven't moved the instrument. What changes is the staff reading, and from that reading we calculate the RL of each point. SUMMARY Same instrument position = Same HI Different staff readings = Different RLs MASTEREDGE ACADEMY

Transcript

Our first reading is called the backsight or BS. We take this reading on a point whose reduced level is already known. Our TBM has an RL of 98.20 meters. Then we go to point 1 to start the project. Because this is not our turning point and we're simply checking the elevation of this point, this reading is called an intermediate sight or IS. This time, we move to another point. Again, this is an intermediate site because we're determining the RL of another point from the same instrument position. This time, it's a foresight or FS. A foresight is normally the last reading taken from the instrument position before we move the instrument. BS IS FS HI REMARK 1.20 98.20 TBM 1.16 98.24 Point 1 2.01 97.39 Point 2 1.90 97.50 Point 3 Understanding Leveling - Part 1 Calculating HI and RL HI is the height of the instrument. Formula: HI = RL + BS. Therefore: HI = 98.20 + 1.20. HI = 99.40 m. HI is the height of the line of sight from the instrument. Calculating RL of each point. Point 1 (Using IS). Formula: RL = HI - IS. RL = 99.40 - 1.16. RL = 98.24 m. Point 2 (Using IS). Formula: RL = HI - IS. RL = 99.40 - 2.01. RL = 97.39 m. Point 3 (Using FS). Formula: RL = HI - FS. RL = 99.40 - 1.90. RL = 97.50 m. The Teaching Moment. Notice something important: The HI remains 99.40 m because we haven't moved the instrument. What changes is the staff reading, and from that reading we calculate the RL of each point. Summary: Same instrument position = Same HI. Different staff readings = Different RLs. MasterEdge Academy.