Surveying has been an essential element in the development of the human environment for so many centuries that its importance is often forgotten. It is an imperative requirement in the planning and execution of nearly every form of construction.
   It has been widely used in the areas like economic construction, national defense development and scientific research.
   In economic constructions, surveying is so important in works like resource survey, city planning, water conservancy construction, landscape planning and design, industrial and civil architecture, construction of road and bridge, mineral exploration. Surveying goes through the whole procedures in constructions and surveyors are the pioneers in it.
   Surveying is playing great role in national defense constructions like deployment of strategy, the choices of route of marching and setting of logistics supply.
In scientific research so many areas like diastrophism, earthquake prediction, landslide detection, damage forecasting and space technology need the support of surveying technique.