Key Technology Of Urban Emergency And Spatial Correlation Analysis

Traditional statistical analysis shows that the spatial and temporal distribution characteristic of emergency is related to the number of environmental factors.In recent years,the space syntax theory has been introduced to effectively reveal the correlation between the distribution of emergency and spatial morphological mechanism by some foreign scholars,but the lack of systematic method is a big problem.In this paper,a unified framework for the analysis of the correlation between emergency and spatial morphology based on the "parcel-incident" framework is proposed.The concrete achievements are as follows:Firstly,a novel method of analyzing correlation between emergency and urban spatial form is proposed.The ontology concept of analysis on correlation between emergent events and spatial morphology based on the ABC ontology model is proposed.And on this basis,the data structures,like road network,regional network,emergency and so on,and the related spatial morphological characteristics are defined.In addition,the spatial morphological calculation operators of road segment and region are given.Secondly,taking the 110 handling alarm records of a big city as emergency data,11 different types of emergencies are extracted,and after aquiring and processing the parcel and road data,the mapping of case and statistical analysis are further completed,using the correlation analysis framework between emergency and urban morphology to construct the road network and regional network.Finally,an empirical analysis is carried out on a large city.Employing the proposed various calculation operators and processed data structure,comparative analysis is carried out.On the one hand,temporal spatial distribution of different emergency is revealed;On the other hand,the correlation between emergency and spatial morphological variables is studied as well.In this paper,the proposed method of correlation between emergency and spatial form relation studies the "support" and "restraint" effect of spatial form and environmental entity factor to the emergency,the effect of spatial form to emergency distribution,and spatial mechanism of emergency distribution.