Linear measurements in surveying can be performed by mainly three methods namely direct method, electromagnetic methods and optical methods. The direct method is the common method that employs a chain, tape or any other instrument to measure the linear distance.
Various methods coming under the direct method of linear measurement are:
1 Linear Measurement by Pacing
2 Linear Measurement by Passometer
Linear Measurement by Pedometer
Linear Measurement by Odometer and speedometer
Linear Measurement by Chaining