Google Earth's usage for golf
Here is how I use Google Earth for my golf rounds. Open Google Earth and zoom it into a golf course. In the top raw, you will see an icon looking like a scale and click it. Then a small window (Ruler) will pop up on the screen. Change the unit from 'Miles' to 'Yards' or 'Meters' and drag the mouse over a hole to measure the distance. Now you have your own yardage book.
Happy golfing.