This article uses urban emergency response management as the background.Spatial clustering method is adopted to solve the site selection problem of emergency response center.Firstly,a new data model of emergency management for clustering analysis is given.Secondly,a new spatial clustering method named COD-MEANS-CLASA algorithm is proposed to realize the site selection of emergency center.It has the advan- tages of applying k-means algorithm to reduce result space,using CLASA as result-searching ...