Landscape pattern gradient on tree canopy in the central city of Guangzhou, China Spatiotemporal change and landscape fragmentation in suzhou oasis using the moving window method Analysis of the characteristics of agro-landscape heterogeneity under the different disturbances:a case study of Gongyi City Landscape heterogeneity of mountainous and hilly area in the western Henan Province based on moving window method Spatiotemporal changes of thermal environment landscape pattern in Changsha Gradient analysis of dry valley of Minjiang River landscape pattern, based on moving window method Spatio-temporal gradient analysis of urban green space in Ji′nan City