A study of the parametric method of sky view factor on complex underlying surface in urban area: A case study of national sport stadium area in Beijing
Xin DUAN1,2, Deyong HU1,2(), Shisong CAO1,2, Chen YU1,2, Yani ZHANG1,2
1. College of Resources Environment and Tourism, Capital Normal University, Beijing 100048, China 2. Beijing Key Laboratory of Resources, Environment and Geographic Information System, Beijing 100048, China
Sky view factor (SVF) is a numerical value that describes the three-dimensional characteristics of the city, and hence it is widely used in urban heat island effect, urban energy balance and some other fields. In this study, taking the national sport stadium area as the study area, the authors calculated the SVFs based on the digital surface model (DSM) in the urban areas. Furthermore, fisheye photos were used to extract the in-situ SVFs. Finally, the authors compared and analyzed the results between these two methods. The main conclusions are as follows: ①The SVF value calculated based on the DSM is affected by the search radius and the search direction number. SVFs are decreasing with the increasing of the search radius and the search direction number; ②Specifically, when the search direction is 32 and the search radius is 80 pixels, the value of RMSE is 0.064 (noting that it is the lowest value). The SVF values calculated using the DSM are most similar to those calculated using fisheye photos; ③A certain correlation is observed between the SVF values calculated using the fisheye photos and those calculated based on the DSM, indicating the feasibility of using DSM to calculate the SVF in large urban areas.
段欣, 胡德勇, 曹诗颂, 于琛, 张亚妮. 城区复杂下垫面天空视域因子参数化方法——以北京鸟巢周边地区为例[J]. 国土资源遥感, 2019, 31(3): 29-35.
Xin DUAN, Deyong HU, Shisong CAO, Chen YU, Yani ZHANG. A study of the parametric method of sky view factor on complex underlying surface in urban area: A case study of national sport stadium area in Beijing. Remote Sensing for Land & Resources, 2019, 31(3): 29-35.
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2019, Vol. 31 
), 曹诗颂1,2, 于琛1,2, 张亚妮1,2
