Generalized analysis of regional fire risk using data visualization of incidents

Abstract

Summary Fire has been a worldwide disaster, and it is important to analyze regional fire risk for better fire prevention. Regional fire risk can be generally analyzed by using data visualization of fire incidents. A dataset of 20 622 fire incidents in Changsha City of China from 2011 to 2017 was processed and filtered as the origin risk points. Then, a generalized risk model (GRM) was established for calculating fire risk values of anywhere in Changsha. By using JavaScript and HTML5, the generalized fire risk graphics were drawn based on mapping different fire risk values with different colors. For visualizing fire incidents, the inner and outer generalization radiuses of the origin risk point were set to be 1 (110 m) and 10 (1100 m), respectively. It was found that the high and medium fire risk areas were mainly distributed in urban areas and market towns, especially in central city. The spatial distribution characteristics of fire risk of different time ranges and different causes were significantly varied. The results can provide guidance of fire prevention for the fire department in Changsha. Other cities' regional fire risk and even other types of disaster risk can also be generally analyzed using GRM.

Regional Risk Assessment for Urban Major Hazards Using Hybrid Method of Information Diffusion Theory and Entropy

“…. , 0.7}, Δ 5 � 0.02, 36 levels in total By using (11), the difusion coefcients of h e associated with fve indicators were computed. For comparison, corresponding values of h 0 were also calculated by using (2).…”

“…Ten, the entropy H can be derived from equation (9). Via equations (10) and (11), h can be computed.…”

“…Many studies have been conducted to explore the possible regional risks caused by a single hazard in the felds of fre protection, construction, chemical industry, and environment [1,[8][9][10][11]. By the superposition of single risks, the regional risk involving multiple hazards had been simply described [12].…”

“…Yang et al [16] proposed a multiscale environmental accident risk assessment model to comprehensively evaluate the characteristics and impacts of environmental risk at diferent scales. As a huge carrier of society development, regional security has gradually evolved from qualitative description to quantitative analysis, deepened from certainty to uncertainty, and developed from random uncertainty to fuzzy uncertainty [11,[17][18][19]. For example, Zhou et al [20] claimed that uncertainties existed in slope stability analysis and proposed a probabilistic method for landslide prediction.…”

Análise de Dados de Focos de Calor no Brasil Através de Técnicas de Visualização

“…Incidentes de focos de calor ocorridos entre 2011 e 2017 na cidade de Changsha (China) foram analisados em [Liu et al 2019], com o intuito de se avaliar o risco de incêndios nessa região. A partir dos dados, um modelo de risco generalizado (GRM) foi proposto, e visualizações foram utilizadas de modo a mostrar graficamente tais riscos.…”