Analysis of Agglomeration Characteristics of Public Service Facilities in Mountainous Villages and Towns Based on POI Data

This paper obtains the population data and GDP data of 13 counties in the Aba Tibetan and Qiang Autonomous Prefecture of Sichuan Province, China based on the government statistical data set, obtains the POI data based on the Gaode map, and uses Average Nearest Neigh Index, Kernel Density Analysis, Standard Deviation Ellipse, Pearson Correlation Analysis method to analyze the agglomeration characteristics of public service facilities in each county and its correlation with the level of economic development. The results show that: the public service facilities in the study area as a whole show a spatial pattern of "more in the southeast and less in the northwest"; the spatial agglomeration of various public service facilities is significant, and the degree of agglomeration of tourism-related public service facilities such as catering and shopping is the highest , financial insurance, science, education and other life-related public service facilities have the lowest degree of agglomeration; all kinds of public service facilities are in the direction of "southwest-northeast" as a whole, and public service facilities related to outdoor activities such as sports, leisure and accommodation have the strongest directionality; the research area The spatial agglomeration of public service facilities is affected by factors such as nature and economic development.keywords：POI, mountain villages and towns, public service facilities, agglomeration characteristics