From Community to City: Challenges and Research Progress in Cross-Scale Sustainability Assessment

Ajiao Luo

Published 2025 in Sustainable Development Research

ABSTRACT

Global urbanization is accelerating in the 21st century, and the United Nations projects that the urban population will reach 6.5 billion by 2050, positioning cities as the primary arena for implementing SDG 11. However, existing research on urban sustainability assessment remains largely confined to either the city or community scales, exhibiting considerable fragmentation, and neglecting dynamic cross-scale interactions leads to policy mismatches. This study conducts a systematic review of literature published between 2015 and 2025 in the Web of Science and Scopus databases, following the PRISMA guidelines. After excluding single-scale and non-urban studies, 14 core papers were identified. The results reveal three dominant pathways for cross-scale city–community assessment: top-down, bottom-up, and hybrid approaches. Methods predominantly involve computational modeling and spatial analysis (GIS), indicating a trend toward methodological integration. Indicators commonly demonstrate cross-dimensional coupling and cross-scale nesting structures. However, persistent challenges remain, including data barriers, insufficient coverage of sociocultural dimensions, and high technical thresholds. Future efforts should prioritize enhancing data integration, refining multidimensional indicator frameworks, and reducing application barriers to advance cross-scale assessment and achieve the coordinated, sustainable development of cities and communities.

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