Q. What is Reconnaisance Survey explain?

This item should apply to all rough and rapid investigations of an area with a view to determine the technical feasibility and approximate cost of one or more routes for a projected railway line from a general and some what hazy examination with a help of countered survey of India maps and other available material with out a more case for investigation in the field and with a use of only those instruments that will rapidly give approximate distance and heights such as prismatic compass hand levels etc.