Home / Land Surveying / Linear measurements in the surveying by Direct Method

Linear measurements in the surveying by Direct Method

Linear Measurements in the Surveying by Direct Method

The Linear measurements in surveying can be performed by mainly 3 methods namely direct method, electromagnetic methods & optical methods. The direct method is the common method that employs the chain, tape or any other instrument to measure the linear distance.

Linear Measurements in the Surveying by Direct Method

Various methods coming under the direct method of the linear measurement are.

  1. Pacing
  2. Passometer
  3. Pedometer
  4. Odometer and speedometer
  5. Chaining

1 – Pacing

The pacing technique is mostly employed in the preliminary surveys & explorations. In this method the Land Surveyor is required to conduct the rough survey quickly. This also roughly check the distance measured by the other means.


In this method the number of the paces between the 2 points of the line is counted. Knowing the average length of pace helps to know the length of line. The length of pace is dependent on the person who is measuring the ground the speed of the pacing & the slope of the country.

Learn More 

  1. Transition Curve In Highways – Purpose-Requirements-Example

  2. Super-elevation And Design Formula | Advantages | Highway Engineering

  3. What Is Difference Between Camber and Super Elevation In Road

By walking on an approximate level ground over various lines of known lengths helps to the determine the length of one’s natural step. Performing pacing over rough ground or on slopes is the difficult process.

2 – Passometer

The Passometer is a watch like instrument that is the carried on the person’s pocket or tied on the man’s leg. This instrument records paces when the man moves from 1 point to another.


This technique hence overcomes the monotony & strain in counting the paces by the Land Surveyor. The distance is the calculated as the product of the number of the paces & the average length of the pace.

3 – Pedometer

Pedometer is the similar device like Passometer that automatically measures the distance. A pedometer is the best in measuring the vertical distances.


4 – Odometer

Odometer is an instrument that measures the number of the revolutions of a wheel. The number of the revolutions taken to cover the length multiplied by the circumference of the wheel gives value of the distance covered.


This instrument does not provide the accurate results on an undulating surface. When the surface is smooth and the speedometer used in the vehicles can be used.

Learn More 

  1. How To Calculate The Horizontal Distance Using With Auto Level Machine

  2. What is Difference Between Whole Circle Bearing and Quadrantal Bearing

  3. How To Calculate The Height Of Any Buildings And An Objects Using With Theodolite

5 – Chaining

Chaining method determines the distance by means of the tape or a chain. This is 1 of the accurate methods to determine the linear measurements. The chain is used for the ordinary precision. Tape or the special bar is used to measure distance with high precision.

Other Post

  1. What is The Benefits and Drawbacks Of Total Station.

  2. What is Drone Surveying And Benefits Of the Drone Surveying.

  3. Why Camber is Provided in Road Construction 

To Get More information, Visit Our Official websites

Land Surveying & Architects


About Raja Junaid Iqbal

Hi My name is Raja Junaid Iqbal and i am Land Surveyor by Profession but I've specialized in the field of Q,S and land development. As Professional Surveyor I engaged my self in all over the Gulf since 14 years.

Check Also

How To Convert Bearings and Distances to Coordinates

How To Convert the Bearings and Distances to Coordinates

How to Convert Bearings And Distances to Coordinates In This Article I will explain how …

error: Content is protected !!