Geo-spatial analysis and optimization strategy of park green space landscape pattern of Garden City– A case study of the central district of Mianyang City Sichuan Province

Figures & data

Figure 1. Research area

Table 1. Selection and implications of landscape pattern index

Landscape Index	Remark	Equation
Number of Patches (NP)	Number of patches
Class Area (CA)	Total area of patches	$\mathrm{C}\mathrm{A}=\left(\sum _{\mathrm{i}=1}^{\mathrm{n}}{\mathrm{a}}_{\mathrm{i}}\right)10^{-4}$
Patch Density (PD)	To measure the distribution density of park green patches	$PD=\frac{N}{A}$
Mean Patch Size (MPS)	Average area of park green patches	$MPS=\frac{A}{N}$
Largest Patch Index (LPI)	The largest patch area, to measure the park green patch scale, the higher the value, the larger the patch scale	$LPI=\frac{Max\left(a_1,\dots ,a_n\right)}{A}\times 100\mathrm{\%}$
Landscape Shape Index (LSI)	Using the square as a reference, to measure the complexity of the shape of the park green patch, and E is the perimeter	$LSI=\frac{0.25E}{\sqrt{A}}$

Figure 2. Vegetation coverage index of Fucheng District from 2000 to 2018

Table 2. Classification of urban park green space patch size at city scale

	Area		Number
	Area (hm^2)	Ratio	Number	Ratio	Average Patch Area (hm^2/each)
Small patch	147.94	10.48%	36	52.17%	4.11
Medium patch	360.63	25.54%	22	31.88%	16.40
Large patch	325.06	23.02%	8	11.59%	40.63
Extra large patch	578.29	40.96%	3	4.35%	192.76
Total	1411.92	100%	69	100%

Table 3. Classification of park green space patch size in Fucheng District

	Area		Number
	Area (hm^2)	Ration	Number	Ration	Average Patch Area (hm^2/each)
Small patch	194.2	39.09%	131	88.51%	1.48
Medium patch	212.7	42.81%	15	10.13%	14.18
Large patch	36.47	7.34%	1	0.68%	36.47
Extra large patch	53.34	10.74%	1	0.68%	53.34
Total	496.80	100%	148	100%

Figure 3. Patch extraction of green space landscape in Fucheng District

Table 4. Analysis of the patch landscape index of park green space in Fucheng District

	Class Area (CA)	Patch Density (PD)	Mean Patch Area (MPS)	Largest Patch Index (LPI)	Landscape Shape Index (LSI)
Small patch	194.2	0.676	1.48	0.047	0.988
Medium patch	212.7	0.070	14.18	0.103	0.500
Large patch	36.47	0.027	36.47	1.000	0.100
Extra large patch	53.34	0.018	53.34	1.000	0.155