Atlanta is the capital and most populous city of Georgia, in the United States. It is the county seat of Fulton County, although a portion of the city (the 1909 annex) is located in DeKalb County. According to the latest census estimates (as of December, 2004), the city has a population of approximately 419,122 and the Atlanta metropolitan area totaled 4,708,297. Atlanta has long been considered the economic powerhouse of the Southern United States and is arguably a poster-child for cities worldwide experiencing rapid urban sprawl, population growth, and commercial development. As a result, Atlanta is a common case study for college students who study urban geography around the globe.