Measurement, calculation, and accuracy

Measurement, calculation, and accuracy

Understanding Measurements in Surveying

  • Units of Measurement: In surveying, measurements are typically made in metric units (metres and millimetres) or imperial units (feet and inches) depending on the context. Familiarise yourself with both.

  • Measurement Tools: Variety of tools are used in surveying - from simple tape measures to advanced Total Stations. Understand their applications and learn how to use them effectively.

  • Conversion of Units: It is essential to understand how to convert units from metric to imperial or vice versa.

  • Field Notes: Maintain clear and accurate field notes when conducting surveys. These records will be used to analyse and interpret data.

Calculation Techniques

  • Trigonometry: Understanding of basic trigonometry is crucial in surveying for calculating distances, angles and elevations.

  • Coordinate Geometry: Use of coordinate geometry helps in pinpointing exact locations on a map or plan.

  • Area Calculations: Ability to calculate areas of different shapes (like square, rectangle, circle, trapezium) is useful in planning and design.

  • Volume Calculations: Knowledge of volume calculation can aid in determining material quantity for construction or earthworks.

Ensuring Accuracy

  • Calibration: Always begin surveys with a properly calibrated instrument. Equipment should be checked and set as per manufacturer’s guidelines.

  • Double-checking: To minimize errors in measurement, consider double-checking the data. This can be achieved by measuring the same attribute using different methods or tools.

  • Data Analysis: After the data is collected, carefully review it for inconsistencies. Cross-reference your findings with computed results for accuracy checks.

  • Error Rectification: Understand the difference between human errors (like misunderstanding, miscalculation) and instrumental errors. Learn how to rectify these to maintain accuracy.

Remember, precision in surveys is achievable with a thorough understanding of measurement and calculation techniques and a careful, focused approach to accuracy.