| Summary: | To effectively control and reduce the occurrence of accidents in public places, where crowds are easily gathered, is the problem of urban management. The paper proposes a method of monitoring population density which based on the combination of GIS and mobile location data. With the secondary-development which based on component GIS, this method can position the mobile location data in order to map the graph model and monitor the area, counting the number, area and crowddensity of monitoring area. We design and implement some system functions such as display warning messages and cartographic visualization to provide decision support for urban population management and control.
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