Research on the spatial characteristics of population distribution in the main urban area of Kunming based on geographic information system

Population is the most active factor in urban development, and GIS can analyze and visualize the spatial characteristics of population distribution within a city. Based on mobile phone signaling data, this paper uses three methods in geographic information system analysis software (ArcGIS) to analyze the spatial characteristics of population distribution in the main urban area of Kunming by using three methods: kernel density analysis, trend surface analysis and spatial autocorrelation analysis. The results show that: 1) the combination of mobile phone signaling data and geographic information system can more accurately and conveniently study the spatial distribution characteristics of residential population in cities; 2) The overall spatial distribution of the residential population in the main urban area of Kunming is uneven, with the central area (Third Ring District) being significantly concentrated and the peripheral (new urban area) relatively scattered.