“…Based on urban growth phase theory, spatial urban evolution can be a general temporal oscillation between phases of diffusion and coalescence (Dietzel, Oguz, Hemphill, Clarke, & Gazulis, 2005b;Duncan, Sabagh, & Van Arsdol, 1962;Yu & Ng, 2007;Winsborough, 1962). Diffusion is defined as the dispersion of patches, while coalescence is the fusion of patches into one patch (Dietzel, Oguz, et al, 2005).…”