Virtual Google Earth is a website that allows you to enter a street address in order to find its latitude and longitude. This is very useful information for astrologers. If a client was born at home or in a particular hospital, you can find the exact coordinate of birth. It is also useful for calculating return charts.
Suppose you knew that President Obama spent his solar return birthday at the White House and you wanted to cast the chart for his actual location at the time of the return. You could plug 1600 Pennsylvania Ave NW, Washington, DC into Virtual Google Earth and get the coordinates of the White House (in the upper right-hand corner). The image would look like this:
The link for Virtual Google Earth is http://www.pixeldevelopment.com/virtualgoogleearth.asp.