*3.3. Sample Selection*

Based on the classification applied in Chinese urban planning regulations and the distribution of parks in Zhengzhou city, this paper selected five functional types of parks, 123 (one hundred and twenty three) parks in total as study sites (Table 2). The parks boundaries were determined based on high-resolution Google Earth images and low-altitude UAV (drone) images. As the original spatial resolution of the Landsat thermal infrared band is 100 m, we selected sample parks larger than 2 hectares.


Urban Park 59 48% 87.16 3.12 City park, District park Theme Park 10 8% 108.53 10.61 Botanical garden, Zoo Street Park 28 23% 25.26 1.23 Pocket park, community park. Linear Park 19 15% 62.02 2.13 Riverside park, roadside park Urban Square 7 6% 6.64 2.15 Square
