Aquaculture Engineering (2+1)

Unit 1- Surveying

Ranging, types of ranging

Ranging of survey line:

While measuring the length of a ‘Survey line’ or ‘Chain line’, the chain or tape must be stretched straight along the line joining its two terminal stations. If the length of the survey line is less than the length of the chain, there will be no difficulty in doing so. However, if the length of survey line exceeds the length of the chain, some intermediate points will have to be established in line with the two terminal points before chaining is started. The process of fixing or establishing such intermediate points is known as Ranging.