Fig. 9: Morphological analysis diagram of TT disaster prevention adaptability.

a Relationship between TTs’ building scale and space area ratio. In this diagram, the horizontal axis represents the building scale of TTs, and the vertical axis represents the OSR of TTs. b Functional elevation distribution of TTs’ open space, In this picture, the red dots represent the area of emergency refuge and the gray squares represent the area of emergency evacuation. The horizontal axis represents altitude, and the vertical axis represents the proportion of area. c Functional slope distribution of TTs’ open space. In this picture, the red dots represent the area of emergency refuge, and the gray squares represent the area of emergency evacuation. The horizontal axis represents slope, and the vertical axis represents the proportion of area.