Yardage Book An offshoot of the GOLFf/x System, the Yardage Book consists of a series of graphic effects that allow the TV golf analysts to illustrate information and tell stories by inserting the graphics and relevant ShotLink data -- the official real-time scoring system for the PGA TOUR -- into the broadcast. Graphic effects include illustrations such as how a golfer played a hole on the previous day; how a hole should be played incorporating wind factors, pin placement, yardage markers and landing zones; and shot charts revealing location of tee shots, birdies, bogeys and how the leaders played a specific hole.