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Spatial inequality in basic service provision is a key challenge for smart city development strategies. With a focus on walkable accessibility, this paper proposes a new methodological approach to analyzing spatial inequalities in metropolitan cities. In addition to proving the effectiveness of the proposed methodology by using New York City as an empirical case, the insights offered by the analysis contribute to an improvement in the current understanding of the negative implications that spatial inequalities can have on public health. Policies concerning local public service rearrangement should consider spatial inequalities to promote more effective forms of public participation both in the United States and globally. [ABSTRACT FROM AUTHOR]

Smart city development plays an important role in achieving urban sustainability. This paper uses mapping of knowledge domain (MKD) analysis to review 965 studies concerning smart city development and urban sustainability (SCDUS). The most influential journals, scholars, articles, keywords, and regions in the SCDUS research field are identified. Research findings also reveal four prevailing topic clusters in the current SCDUS field, namely information technology, energy and environment, urban transportation and mobility, and urban policy and development planning. Potential research frontiers are further proposed. The findings contribute to a better understanding of the development of current SCDUS research. [ABSTRACT FROM AUTHOR]