Analysis on the Roles of Tourism Destinations in the Yangtze River Delta Metropolitan Area——Based on the Perspective of Tourism Economy
结合引力模型与社会网络方法，分析长三角都市圈旅游经济网络结构，划分五种目的地类型并探讨影响因素，帮助理解各城市在网络中的角色与功能。
Combining the gravity model with social network method,it analyzes the whole network,domestic tourism network and inbound tourism network of tourism economy in the Yangtze River Delta Metropolitan Area,and locates the role and function of each city in the network.Finally the influence factors are discussed.The results indicate: the whole network and the domestic network present balanced spatial patterns of north and south,while the inbound tourism network shows imbalanced pattern: close in north,loose in south.Five types of tourism destinations are divided according to the cities’centrality in the network.Shanghai is the core trip destination,having the comprehensive functions of touring destination,gateway destination and middle destination.Nan Jing,Hangzhou,Suzhou,Wuxi and Changzhou are sub-core tourism destinations,the center of agglomeration and diffusion in the area.Ningbo,Huzhou,Zhenjiang and Yangzhou are important links between low level destinations and high level destinations.The centrality of other cities is lower,mainly accepting the tourism economy exposure of the high level cities;and less connections exist among them,labeled as common destinations and marginal destinations.Tourism development ability,the level of economy,traffic conditions and urban development are important factors affecting the role and function of cities in the network.