These images (taken by NASA) show the urbanzation of Chandler (the fastest-growing satellite city on the outskirts of Phoenix).
ps. 1- According to NASA: ""Chandler grew from just 3,799 residents in 1950 to 176,581 residents in 2000, based on 10-year census figures." That's an average population growth rate of 8% per year (over a fifty-year period!!!)
ps. 2 - Would you call it 'urban sprawl' ?