IMPACTS OF GEOSPATIAL FACTORS ON VILLAGE SITE SELECTION ALONG THE GREAT WALL WATCHTOWER BASED ON LOGISTIC REGRESSION: A CASE STUDY IN GUBEIKOU SECTION, BEIJING, CHINA - Yang, T.; Guo, X.; Jiang, J. (Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci., 2023)