Spatial dimensions of ebola

As the conversation about Ebola continues to mature at a relatively slow rate I found myself looking for some maps that would help me understand the problem a little better and found these from the UN's WHO.

But the CDC had a fairly different looking map that showed all of the African outbreaks since 1976:
 

National Geographic has time-lapse maps that document the speed at which the epidemic has spread.

This is clearly a spatial epidemic, but one that has more than one mappable dimension.