What are the different tapes use in Surveying

 In surveying, tapes are used to measure linear distances and are commonly divided into three main categories: metallic tapes, steel tapes, and Invar tapes.

  1. Metallic Tapes - These are flexible tapes made from metal, such as copper or brass, and are used for general purpose linear measurements. They are known for their durability, but their measurements may be affected by temperature changes.
  2. Steel Tapes - These are strong and durable tapes made from high-quality steel, with a locking mechanism that allows for quick and accurate linear measurements. Steel tapes are often used in construction and engineering applications where accuracy is important.
  3. Invar Tapes - These are made from a special metal alloy known as Invar, which has a low coefficient of thermal expansion. This means that the tape's length remains constant over a wide range of temperatures, making it suitable for precise measurements in both indoor and outdoor conditions. Invar tapes are commonly used in high-precision surveying and engineering applications

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