📍 Important Points When Setting Base on a Benchmark (BM) | Surveying Guide Setting your instrument on a Benchmark (BM) is one of the most important steps in achieving accurate leveling and precise site measurements. A small mistake here can create major errors across the entire project. Here are the key points every surveyor must follow: ✅ Confirm the BM Elevation & Coordinates Always double-check the BM values from project drawings or the control point list. ✅ Ensure BM Is Stable & Undisturbed

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📌 Topographic Leveling – Complete Concept Explained Topographic leveling is an essential surveying method used to determine height differences between points on uneven ground. The image shows a clear step-by-step explanation using leveling staff readings, reference surface, and horizontal line of sight. 👷‍♂️ What’s Included in the Diagram? Leveling staff readings at points A, B, and C Height measurements (1.60 m, 3.10 m, 2.80 m) Surveyor using Auto Level on uneven terrain Reference line, verti