Table 3. Thermal environment characteristics and planting principles according to aspect ratio

Division	Deep and narrow street canyon	Wide and open street canyon
Image	H/W = 2	H/W = 0.5
Thermal characteristics	High thermal comfort due to shade formation	High heat stress due to a lot of solar radiation
Green space Design principles	- Greenery is more important not to obstruct ventilation than to create shade. - Green space must be created in a way that increases the amount of green space.	- Creation of green space requires reducing solar radiation by increasing the amount of shade. - Green space must be created in a way that increases the amount of green space.