Answer by Sreeram N Ramasubramanian:
1. World map showing population distribution latitude-wise and longitude-wise.
One very interesting observation from these maps is to note how the maximum population distribution latitude-wise or longitude-wise invariable passes through Mumbai, India.
2. World map if countries had populations according to their sizes.
The map was developed essentially by taking the list of countries in descending order of population and mapping them with the respective countries in the list of descending order of size.
This particular map provides a lot of perspective about how overpopulated most developing nations are.
EDIT: Thanks tofor originally sharing the second map on facebook and hence bringing it to my attention.