Ranging is the process of establishing many intermediate points to measure the survey lines in linear measurement. This can be done by ranging rods, offset rods, and ranging poles. The first step in any construction work is Surveying. Ranging is one of the important aspects of Surveying.
When the length of the surveying line is longer than the length of the measuring chain, the line can be measured by using intermediate points along with it by ranging.
Ranging can be done by using the following instruments:
Ranging rods are vertical rods used to mark survey points having 2-3 m height. it is painted with bands of red and white 20 cm each.