Abstract
The occurrence of natural disasters has caused great loss of lives and properties that affected many people. To improve the efficiency of the emergency rescue efforts, the problem of road planning for emergency workers, vehicles, and other mobile objects should be overcome. Due to the characteristics of the emergency planning for rescue paths, timely, effective, and rapid efforts should be taken into effect based on geographical data in the road-free environment. This paper analyzes trafficability, researches both access ability and traffic efficiency, and uses traffic efficiency concerning the road-free environment as an influential weight and timeliness to improve the A∗ algorithm, which realizes the rapid planning of the mobile objects' emergency rescue paths in the road-free environment, providing decision-making services for the rescue path planning of disaster emergencies in the environment of no road network. Finally, the experiments were carried out using available data for Shuozhou City, Shanxi Province. The results show that the research can provide a reference for the rescue path planning of disaster emergencies and has contributed to theoretical and applicable aspects of the research.
Highlights
Typhoons, earthquakes, floods, and other natural disasters could occur, causing heavy losses to the lives and properties of many people [1]
Available technical means have not yet been able to effectively prevent and hinder the occurrence of these natural disasters; only by taking high-efficient disposal decisions and emergency response can efforts effectively mitigate losses caused by natural disasters [2]
To improve the efficiency of the emergency rescue and ensure the safety of the people affected by the disaster and distribute the supplies, it is first necessary to solve the path planning problem of disaster relief personnel, vehicles, and other mobile objects [3]
Summary
Earthquakes, floods, and other natural disasters could occur, causing heavy losses to the lives and properties of many people [1]. Erefore, planning disaster emergency rescue path based on topographical data is important in a road-free environment. E content of the research mainly includes environmental trafficability analysis and path search algorithm. Based on the characteristics of strong timeliness and the existence of no road network in emergency rescue path planning, this paper carries out research in the context of the shortcomings of path planning in a roadfree environment. The A∗ algorithm is improved with the traffic efficiency as the influence weight and timeliness as the goal, which effectively improves the computational efficiency and realizes the rapid path planning in the road-free environment, providing decision-making services for the path planning of disaster emergency rescue. E organization of the manuscript is presented as follows: Section 2 deals with the analysis of environmental trafficability based on the grid method to quantify basic terrain and geomorphologic data.
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