Web and wireless geographical information systems : 20th international symposium W2GIS 2023 Quebec City QC Canada June 12 13 2023 : proceedings This volume LNCS 13912 constitutes the refereed proceedings of the 20th International Symposium on Web and Wireless Geographical Information Systems W2GIS 2023 in June 12 13 2023 in Quebec City QC Canada. The 9 full papers presented together with 2 short papers were carefully reviewed and selected from 14 submissions. The conference focuses on topics such as Sensors Networks and Data Steaming; Mobility and Navigation; AI for Mobility Data Analytics; Volunteered Geographic information (VGI); Network Analysis and Geovisualization