Coverage of households by sanitation, drinking water and hygiene services; and integrated water resources management  

3 Pros:
•    Three WW-related aspects are made comparable in one image
•    Time development is included
•    Global coverage is helpful

3 Cons:
•    Low geographic resolution 
•    Integrated water resources management (IWRM): concrete definition may be difficult 
•    IWRM dynamics difficult to assess