As constructed or as built surveys provide information to the client of what has been built or constructed. Often a survey or as built survey of specific features of interest will be in the form of a PDF or digital format drawing, i.e. Auto Cad (.dwg) or Micro-station (.dgn) file. This information would display the as constructed location in relation to the design. Additionally as built information of structures and buildings that already exist, can be provided, to assist with the design or planning of a project.