What do you predict is happening to the lion population between 1960 and 1975

They create genetic variations

Reduction in overall biodiversity

This is the most closely resembles the model. 

Are you asking about a street map usage  if so here is your answer  a street map for a very limited area could simply be a bit map or a .jpg image.  but a more general map would probably store the streets as vectors.  but you shouldn't assume that there is one way to do it