Study on Location Layout of Earthquake Shelter Based on ArcGIS:A Case Study of Ya'an City,Sichuan Province
The location and layout of earthquake shelter is an important part of risk management in earth-quake-prone areas.Aiming at minimizing the evacuation distance,this paper constructs the P-median mod-el of earthquake shelter and the coverage model of earthquake shelter based on the principle of maximum coverage.ArcGIS software is used to integrate the data of traffic network,residential sites and alternative shelters in Ya'an City,and analyzes the location layout of shelters in Ya'an City.The results show that the existing earthquake shelter layout planning in Ya'an city is not reasonable enough.P-median model selects 10 shelters with optimal routes and the capacity ranges from 1 580 to 6 300 people,while 28 shelters are se-lected under coverage model and the capacity ranges from 1 400 to 16 850 people.The research results verify the feasibility and effectiveness of the two models,which can provide a certain basis for emergency manage-ment departments to make decisions.
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