The Chain That Measured Fields
Written by Studio AM.
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Before laser tools, many surveyors measured land with a metal chain. In England, Edmund Gunter described a standard chain in the early 1600s. It was 66 feet long and had 100 links. Markers showed groups of links so workers could count distance.
Two people carried the chain across a field. They pulled it straight and placed pins at each full length. On sloping ground, they had to hold it level. A chain laid along the slope would give a distance longer than the flat map needed.
The measurements went into a field book. Surveyors used them with angles to draw boundaries and maps. Steel tape later replaced many linked chains, and electronic tools came after that. Yet the old word chaining remained a name for measuring a survey line.
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Questions
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Question 1 of 4
What is the main idea of the passage?
The answer is B: Linked measuring chains helped surveyors turn field distances into mapped boundaries before modern instruments.
The passage explains the chain's standard length, its use across land, and how its measurements entered maps. It then places the tool before steel tape and electronics.
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Question 2 of 4
Why did workers hold the chain level on a slope?
The answer is C: They needed the horizontal distance used on a flat map, not the longer distance along the slope.
The text says a chain laid along the slope gives a longer distance than the flat map needs. Holding it level avoids measuring that extra sloping length.
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Question 3 of 4
What are "boundaries" in this passage?
The answer is D: Lines that mark the limits of areas of land
Surveyors combine distances and angles to draw boundaries and maps. In this land-mapping context, boundaries are lines showing where areas begin and end.
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Question 4 of 4
How many links did Gunter's standard chain have?
The answer is A: 100 links
The opening paragraph states that the chain was 66 feet long and had 100 links. The two numbers describe different features.
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