How to change an icon in Google Earth
Google Earth brings some predefined icons, if we want to change or modify them it is possible, although not always so practical because of the limited capacity of the system to make selection by attributes.
To do this, you have to right click on the layer in the left panel and select “properties”. Then you have to choose the option to share style and here you can modify it:
- The thickness of the line
- Fill or Contour Style
- Label size
- Icon size
In the upper area you can select a different icon and see that it is thus possible to define a url of the icon that interests us. Can be 
a web address or a local file, by selecting the button "add custom icon".
In this case, I want to use a figure of the piglet housed in my documents:
Thus, for example, if we want to see the same map of the swine flu in the DF area; of course, the crisis is complicated, the marks in purple are confirmed cases, the pink ones are suspicious and there is not a case in each ball but many in the same community.
To return to the subject, when changing the icon, this would be the result:
It is clear, the inability of Google Earth to make a specific selection prevents you can put piglets of different colors at one stroke.
