Optimal allocation of service area of urban elusion and dispersion based on GIS

In order to obtain the study area of the residential area, the method of visual interpretation combined with the actual survey were adopted to get the elusion and dispersion zone and road network spatial data and attribute data by using remote sensing image of the part area in Jinan. First of all, by using ARCGIS10.0, space buffer analysis was done based on the risk place, and then overlay analysis was done with the buffer analysis results and elusion and dispersion zone. Thus we can get the effective elusion and dispersion zone by eliminating the danger point affected. Secondly, based on road network and effective elusion and dispersion zone entrances, the elusion and dispersion service area was divided. In order to realize recently evacuated, the methods of Euclidean allocation were used to divide the elusion and dispersion service area. Finally, based on overlay analysis of the division of the elusion and dispersion service area and residential area, we study relations of elusion and dispersion zone and residential area, and knowing if the elusion and dispersion service area can accommodate the people of the residential area who come there. If not, by using the buffer analysis and linear programming, the new service area of elusion and dispersion was redrawn, thus we can ensure that all residents of the residential area can go to the nearest elusion and dispersion zones.