Online maps can be basically divided by the covered area (global or local) and by the representation of this area (classic drawn or orthophoto).
Contents
Global online maps
These maps cover the world, but may have insufficient details in some areas.
Local online maps
Local maps cover only part of the earth surface, and may be more detailed than the global ones.
China
Estonia
France
India
United States
References
List of online map services Wikipedia(Text) CC BY-SA