Which Tape is Used for Base Line Measurement?

By Aina Parasher|Updated : July 26th, 2022

Which tape is used for base line measurement?

  1. Chain
  2. Metallic tape
  3. Steel tape
  4. Invar tape

Answer: D. Invar tape

Invar tape is generally used for base line measurement.

Solution

Base line is the longest line in the chain survey field which connects the main station line.

Invar tape consists of nickel (36%) and steel (64%). The thermal coefficient of invar tape is 130 In comparison to steel. So, the distance measured by this invar tape gives more accurate result. Hence, in survey field invar tape is used for base line measurement. Invar tape is generally used for base line measurement.

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