Table 5 The results of validation by percentage differences

Variables	Minimum	Maximum	Average	Median
Regulation services	−0.311	1.130	0.141	0.109
Supporting services	−0.231	0.467	0.145	0.104
Cultural services	−0.301	0.711	0.208	0.141
Urban green space	−0.340	0.987	0.227	0.183
Forests	−0.359	1.130	0.162	0.117
Others	−0.368	0.411	0.182	0.123
Average of total samples	0.178