Research any topic before you write.

Find related topics. | Discover entities. | See connections. | Build a topical map.

Chain (unit)

The chain (abbreviated ch) is a unit of length equal to 66 feet (22 yards), used in both the US customary and Imperial unit systems. It is subdivided into 100 links. There are 10 chains in a furlong, and 80 chains in one statute mile. In metric terms, it is 20.1168 m long. By extension, chainage (running distance) is the distance along a curved or…

Culture, Applications & Measurement

Use the mouse wheel or two fingers (on touchscreens) to zoom in and out of the map.

Research this topic

Explore the main themes, entities and connections around Chain (unit). Start with the topic map, then use the sections below for research and deeper semantic analysis.

Explore this topic

Start with a few of the strongest sections from the source topic. These are research directions, not a list of keywords you must use.

Key facts & relationships

High-confidence facts extracted from structured source data. Use them as anchors for further research.

Imperial/US units
22 yd, 66 ft, 100 links
Metric (SI) units
20.1168 m
Symbol
ch
Unit of
length
Unit system
Imperial/US units

Topics to explore

Browse the full topic structure. Each item opens a new analysis centered on that subject.

Overview

Definition

Modern use and historic cultural references

Advanced semantic analysis

Deeper signals for content research, entity SEO and topical coverage. The plain-language headings explain what each technical view is useful for.

Map overview Semantic statistics

Chain (unit)

Nodes52
Edges51
Triples13
Avg. degree1.96
Density0.038462
Components1

How this topic connects Entity context

See the strongest relationship patterns around the current topic before diving into the raw triples.

Chain (unit)

Top relations

Imperial/US units · 1
Chain (unit) → 22 yd, 66 ft, 100 links
Metric (SI) units · 1
Chain (unit) → 20.1168 m
Symbol · 1
Chain (unit) → ch
Unit of · 1
Chain (unit) → length
Unit system · 1
Chain (unit) → Imperial/US units

Important terminology Word statistics

Use these terms to understand the vocabulary surrounding the topic, not as a checklist for keyword stuffing.

Important terminology

chain chains used 20 feet unit united imperial length system links us land mile one survey 66 statute along new

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
Chain (unit)Imperial/US units22 yd, 66 ft, 100 links1.00infobox
Chain (unit)Metric (SI) units20.1168 m1.00infobox
Chain (unit)Symbolch1.00infobox
Chain (unit)Unit oflength1.00infobox
Chain (unit)Unit systemImperial/US units1.00infobox
bridgesinstance ofthe location of features0.80text
stations was indicated by a cumulative longitudinalinstance ofthe location of features0.80text
High Speed 1instance ofas there may be points at 112 miles 63 chains on other routes.On new railway lines built in the United Kingdom0.80text
the position along the alignment is still referred to asinstance ofas there may be points at 112 miles 63 chains on other routes.On new railway lines built in the United Kingdom0.80text
the New York City Subwayinstance ofSome subways0.80text
the Washington Metro were designed withinstance ofSome subways0.80text
continue with a chaining system using the 100-foot engineer's chain.In the United Statesinstance ofSome subways0.80text

Related concept clusters Concept neighborhoods

These clusters group vocabulary that occurs around closely connected concepts in the source material.

    Connections between topic areas Semantic bridges

    Bridges can reveal useful research angles that are easy to miss in a flat list of related terms.

    Min side: 3
    For writers, content strategists, SEOs, marketers and creators — from quick topic research to advanced semantic analysis.