Section 2 discusses
state-of-the-art smart cities and big data. Section 3 presents the
smart city technologies. Section 4 proposes a new structure of big
data and smart city. Section 5 provides smart-based applications,
which include healthcare, transportation, governance, and smart
grid. Section 6 proposes a future business model. Section 7 looks
at the different case studies of a smart city. Section 8 discusses the
research challenges that remain to be addressed as future research
directions. Section 9 provides the concluding remarks.