Research on the site selection of emergency rescue take-off and landing sites based on GIS-AHP

In the aviation emergency rescue system, emergency rescue take-off and landing site is the vital infrastructure. In this paper, on the basis of difficulty level of implementing the site, overall layout balance and traffic conditions, a hierarchical analysis model is constructed to establish the evaluation index system of low-altitude take-off and landing sites. In addition, the spatial analysis technology of GIS is used to superimpose the index layers to get the final regional grading map of the suitability of take-off and landing sites. Taking a city as an example, using the functions of Euclidean distance analysis and reclassification analysis in the GIS software, the optimal siting area of urban emergency low altitude take-off and landing sites is derived, and by comparing with the existing helicopter landing sites, it is found that the existing sites are distributed in the highly suitable and relatively suitable areas, which verifies the feasibility of the model.