Spatial Coupling Analysis between Color Steel Buildings, Urban Hot Spot and Fire Point —a Case Study of Lanzhou

As a typical product of the transitional stage of urban development, the color steel buildings (CSBs) are easy to cause fire, which is difficult to be extinguished effectively and quickly. This paper aims at the particularity of the geographic location of the CSBs and the lack of joint application with Point of Interest (POI) and fire points in the study of urban fire risk., this paper investigated the fire risk of Lanzhou city based on above three types of data acquired in 2017. The involved data were meshed by kernel density analysis and superposition analysis. Afterward, the pairwise spatial coupling relationship of the data were visualized by two-factor cartography, through which the condition of spatial coupling were obtained. The relationship between the obtained regions and urban fire risk was further compared. The research results show that CSBs and the POI Point are highly coupled with the fire locations of Lanzhou spatially. Thus, the joint application of the two factors can be effectively utilized to evaluate the fire risk in Lanzhou. The phenomena that the CSBs outnumbered the POI Points indicates that the corresponding areas are not well urbanized and have high incidence of fire.