Surveying Chain Lengths: Key Facts

Accurate surveying requires knowledge of standard measurement units and tools, including the lengths of different chains used historically.

Standard Chain Lengths

• Gunter's Chain: This is a traditional unit of length used in surveying. Its standard length is 66 feet. It consists of 100 links, each measuring 0.66 feet.
• Engineer's Chain: This chain is typically 100 feet long and is made up of 100 links, with each link being exactly 1 foot long.
• Revenue Chain: Often synonymous with Gunter's chain, it is also typically 66 feet long, especially in historical land revenue contexts.

Statement Analysis

Let's evaluate each provided statement:

• Statement 1: "Length of engineering chain is 33 ft." This is incorrect. Engineer's chains are 100 ft.
• Statement 2: "Length of engineering chain is 66 ft." This is incorrect. The standard length is 100 ft.
• Statement 3: "Length of Gunter's chain is 66 ft." This is correct. It matches the established standard length for Gunter's chain.
• Statement 4: "Length of revenue chain is 33 ft." This is incorrect. Revenue chains are typically 66 ft.
• Statement 5: This option is empty.

Based on the analysis, only the statement defining the length of Gunter's chain is factually correct.