Complexity of Functional Urban Spaces Evolution in Different Aspects: Based on Urban Land Use Conversion

Figure 3

The concentric ring characteristics of functional urban spaces evolution (2003–2015). With the centre of the circle as the starting point of the coordinate system, the first, second, third, and fourth quadrants represent residential, public service, commercial, and industrial spaces, respectively. “+” indicates the increase of a certain urban space; “−” indicates the decrease of a certain urban space.