What are the advantages and disadvantages of chain surveying?

What are the advantages and disadvantages of chain surveying?

Some of the disadvantages of chain surveying can be listed as follows:

• Chain surveying is not suitable for large areas.
• It is relatively difficult to be carried out in crowded areas or bushy areas.
• It is not suitable for areas with undulations where chaining is difficult and prone to errors.

What is a chain survey?

Chain surveying is the branch of surveying in which only linear measurements are made in the field. This is suitable for the survey of small areas with simple details and an area that is fairly flat. It derives its name from the fact that the principle equipment commonly used is the chain.

What are the uses of Chain survey?

Chains and scales are commonly used to directly measure the linear distance between two points above the earth’s surface. We will study the types of these chains and measurements and how the distances are measured by the primary purpose of the survey is to create maps. The maps are drawn in a horizontal plane.

What are the steps of chain surveying?

Chain survey steps:

1. Reconnaissance. The preliminary inspection of the area to be chain surveyed is called reconnaissance.
2. Marking stations. Stations are marked with ranging rod, or wooden peg, driving a nail or spikes if hard surface, or embedding stone with a cross mark.
3. Reference sketches.
4. Running survey line.

What are the disadvantages of chain?

Disadvantages of chain drives

• They can not be used where slip is the system requirement.
• They require precise alignment compared to belt drives.
• They require frequent lubrication.
• They have less load capacity compared with gear drives.
• Their operation is noisy and can cause vibrations.

What are the errors in chain surveying?

Errors in Chain Surveying – Types and Causes

• Erroneous Length of the Chain or the Tape.
• Errors due to Inefficient Ranging.
• Errors due to Inefficient Straightening.
• Errors due to Careless Holding and Markings.
• Error due to Sag in Chain.
• Personal Mistakes.
• Errors due to Variation in Pull.
• Errors due to Variation in Temperature.

What is the principle of chain survey?

Chain surveying is the type of surveying in which only linear measurements are made in the field. The main principle of chain surveying or chain triangulation is to provide a framework consist of number of well-conditioned triangles or nearly equilateral triangles. It is used to find the area of the field.

What are the instrument used in chain survey?

INSTRUMENTS: Prismatic compass, tripod, tape, chain, arrows and ranging rods.

What are the errors in chain survey?

What is chain survey error?

Erroneous Length of the Chain or the Tape This error is a cumulative error that can either take a negative or a positive value. If the length of the chain is long, then the measured distance is smaller and the error is negative. And when the length of the chain is short, then the measured distance is long.

What is an obstacle in chain survey?

The three main obstacles in chaining of a line are of the following types: 1. Chaining Free, Vision Obstructed 2. Chaining Obstructed, Vision Free 3. Chaining and Vision Both Obstructed. It sometimes happens that a survey line passes through some object such as a pond, a building, a river, a hedge etc.

What are the advantages of chain?

The main advantages of chain transmission are the possibility to convey either small or important powers with high security and in a positive way, with limited obstruction e good output which, if the chain is chosen correctly and suitably lubricated , can reach 98% .