The problem is one of placement and perspective. The former (of) reflects situations where sociologists maintain their disciplinary base (an academic sociology department for example) and train their sociological lens on fields of inquiry (such as medicine) for the purpose of answering sociological questions.
The Gold Coast was a British colony on the Gulf of Guinea in west Africa that became the independent nation of Ghana in 1957. The first Europeans to arrive at the coast were the Portuguese in 1471.
The Central Coast is a peri-urban region in the Australian state of New South Wales, located on the coast north of Sydney and south of Lake Macquarie. The Central Coast has an estimated population of 323,079 as at June 2014, growing at 1% p.a. making it the third largest urban area in New South Wales and the ninth largest urban area in Australia.