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(iii) Propose three alternate routes to find out which is the most economically and technically feasible route (During this process, approximate Angle points are also fixed using Global Positioning System (GPS)).
(iv) The above exercises are shown in Topographical Maps issued by Survey of India.
(v) The next stage is whatever is there in the Map is transferred to the ground viz., marked in the ground.
(vi) The angle points are fixed on ground by using Global Positioning System (GPS) instruments.
(vii) A Detailed survey is conducted. For every 20 meters, ground level measurement is taken & Geographical details are collected and line peg mark fixed.
(viii) A profile is made on the above details. Normally, the space between two towers is 400 meters. The span will depend on the ground level, road, railway track, river and settlements and technical aspects.