This video covers using the project point and survey point coordinates in Revit 2013. It covers how to properly adjust the project point in Revit and How to adjust the survey point in Revit in Plan and elevation.
How shared cords work: https://youtu.be/LQrsT41qJxY
How to use shared cords on a large project to keep all files referencing the same points: https://youtu.be/VWrarWW2cgM
Source