Why was georgia's first capital so close to the coast?

After the British left, the capital was moved to Augusta, then Louisville while a new city was being built on the Oconee River, reflecting the western move of Georgia's populace. But by 1847 some were unhappy with Milledgeville and called for an election to move the capital to Atlanta. If

It can provide a social code to protect each citizen's future economical earnings. and then obviously defending the country from invading countries.