What is the special importance of land surveying and interest to environmental discipline relating to quantity surveying?

As we know cost scope n schedule are pillars of any project and quality covers these three. Now indexes and variances help identify progress of a project, they help track if project is as per schedule or in budget

survey is the base of construction.First location then position location established .directions located. in bridges and roads ,elevation.these are basics of engineering.

   Interest to environmental relating to quantity I do not know add in my knowledge