基于D-S证据理论的“丝绸之路旅游带”5A景区区位优势度测评

景区发展与其区位条件密切相关,处于优势区位的景区更容易获得优先快速发展。以“丝绸之路旅游带”为例,综合考虑资源、市场、交通及服务四大区位因子,将其视为证据,引入D-S证据理论对景区区位优势进行测度,以I~V级表征区位由优到劣的状态,最后对景区区位与旅游发展核心区进行对比。结果显示：（1）区位优势等级区域差异化显著,总体呈现由东南至西北逐级递减的空间分布规律,自I至V级,重心逐步向西北方向偏移。（2）各区位因子分布存在差异性,东南地区景区资源区位优于西北地区;市场区位地带间差异最为明显,存在“长尾”特征及陕西“一省独大”现象;交通区位内在差异性与区位优势相仿;服务区位已不再是制约景区区位的主要因子,但就单个省份来看,“核心—边缘”结构较为明显。（3）与景区旅游发展对比来看,二者具有明显的空间关联性,但仍存在一定程度的空间错位现象。

Evaluation on location advantages of 5A-Grade attractions in Silk Road Travel Belt based on the D-S evidence theory

The development of scenic spots is closely related to their location conditions, and scenic spots in advantageous locations are more likely to gain priority and rapid development. Taking the "Silk Road Tourism Belt" as an example, considering the four major location factors of resources, market, transportation and service, it is regarded as evidence, and the DS evidence theory is introduced to measure the location advantage of the scenic spot, characterizing the location from superiority to inferiority with I-V level. Finally, we compare the core area between the location and the tourism development of the scenic spot. The results show that: (1) The location advantage level is significantly different, and the overall spatial distribution law is gradually decreasing from southeast to northwest. From I to V, the center of gravity gradually shifts to the northwest. (2) There are differences in the distribution of location factors. The resource location of scenic spots in Southeast is better than that in Northwest; the difference between market locations is the most obvious, with the characteristics of "long tail" and the phenomenon of "one province alone" in Shaanxi; the inherent differences between traffic locations and the location advantage is similar; the service location is no longer the main factor restricting the location of the scenic spot, but in terms of individual provinces, the "core-edge" structure is more obvious. (3) Compared with the tourism development of scenic spots, the two have obvious spatial correlation, but there is still a certain degree of spatial dislocation.