You can use KML files to create maps in Google Fusion Tables.





This tutorial is useful when you want to create geographic files of places that are hard to find in ready geo files. It's recommended for smaller projects, as everything is done by hand. Easy to imagine that mapping all buildings in a selected country isn't this case :)

Comments to the tutorial: I keep everything in folders, it's not a must but when you have a few polygons or lines or points it's easier to keep order. I segregate everything by type, so for example polygons and points are never in the same folder, I do this just in case if I wanted to export KML to shape file.