During Railway alignment and topographical survey for 260km long rail corridor , I came across a process where a survey company followed the below procedure
1. Established DGPS Stations every 5 km using whole to part concept.
International Summer School 2014 - 5th edition 17 to 26 July 2014 - Roma and Castellana Grotte (Bari) Survey for Planning: New Technologies and Land Protection Knowledge Habitat for Living http://www.coifa.it/iss2014/iss_2014.html