Why do we use chain and tape?

1.1 Chain and Tape Chains or tapes are used to measure distances on the field. A chain (see Fig. 1) is made up of connected steel segments, or links, which each measure 20 cm. Sometimes a special joint or a tally marker is attached every 5 metres.

What is a chain measurement used for?

A chain was a unit of length. It is part of the imperial and United States customary systems. It was used for measuring land.

What is the length of a surveyor chain?

surveyor’s chain, also called Gunter’s chain, measuring device and arbitrary measurement unit still widely used for surveying in English-speaking countries. Invented by the English mathematician Edmund Gunter in the early 17th century, Gunter’s chain is exactly 22 yards (about 20 m) long and divided into 100 links.

What is chain and tape survey?

Definition. Chain survey is the simplest method of surveying. The necessary requirements for field work are chain, tape, ranging rod, arrows and sometime cross staff. It is a system of surveying in which sides of various triangles are measured directly in the field and NO angular measurements are taken.

What are used after every chain length measured on the ground?

arrow
9. What are used after every chain length measured on the ground? Explanation: An arrow is inserted into the ground after every chain length measured on the ground. Wooden Pegs or pegs and offset rods are the survey instruments used in the chaining process in surveying.

What is chain length chemistry?

For any chemical chain reaction, the chain length is defined as the average number of times that the closed cycle of chain propagation steps is repeated. It is equal to the rate of the overall reaction divided by the rate of the initiation step in which the chain carriers are formed.

What is tape surveying?

Tapes are used in surveying for measuring Horizontal, vertical or slope distances. Tapes are issued in various lengths and widths and graduated in variety of ways.

What is chain in survey?

The chain is a unit of length equal to 66 feet (22 yards). 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 straight survey line from a fixed commencing point, as given by an odometer.

Why is chain survey important?

It is suitable for small areas of fairly open ground. 2.It is used to fill in details on a map whose large features have been surveyed by other methods. 3. It is used in mapping small areas of flat or near-flat ground and associated objects, for example paths, roads and railways.

What is gunters chain in Agric?

Gunter’s chain (also known as Gunter’s measurement) is a distance measuring device used for surveying. It was designed and introduced in. 1620 by English clergyman and mathematician. Edmund Gunter (1581–1626). It enabled plots of land to be accurately surveyed and plotted, for.

Which tape is used for base line measurement?

Invar tape
Invar tape is used for the base line measurement.

How are distances measured on a map in Chains?

Early land surveyors measured distances based on the length of their equipment. For example, a chain consisted of 100 links, each measuring 0.66 feet in length for a total of 66 feet. Thus, to calculate a distance represented on a map in chains, you would have to multiply by 66 to get the number of feet.

What are the different types of chains used in surveying?

Following are the various types of chain in common use in surveying: 1. Metric Chain: Metric chains are made in lengths 20m and 30m. Tallies are fixed at every five-meter length and brass rings are provided at every meter length except where tallies are attached.

What are the different types of measuring tapes in surveying?

Types of Measuring Tapes in Surveying. Tapes are made of different materials: 1. Cloth or linen tape. Used for subsidiary measurements. Very light, easy to handle. May effect by moisture. 2. Metric steel tape.

How does a land surveyor determine distance between property lines?

Using specialized equipment, the surveyor will then pull exact distances from several points around the property to establish property lines. Early land surveyors measured distances based on the length of their equipment. For example, a chain consisted of 100 links, each measuring 0.66 feet in length for a total of 66 feet.