What are the four key dimensions proposed in the chapter for the digital analysis of historical and cultural districts from a spatiotemporal vitality perspective?

The four key dimensions are functional diversity, supply–demand coupling, accessibility, and spatial permeability.

The chapter identifies these four dimensions as the main entry points for precise digital analysis and design intervention, selected from classic urban design theory. Functional diversity and supply–demand coupling reflect functional characteristics, while accessibility and spatial permeability reflect spatial perception. These dimensions were chosen because they are both measurable with existing techniques and relevant to spatiotemporal vitality.