Spatial-Temporal Evolution Characteristics of Vegetation Coverage and Urbanization Expansion in Dongguan Based on Remote Sensing

The purpose of this study is to use the Landsat satellite image Dongguan from 2005 2021, combining dimidiate pixel model and stochastic matrix method, calculate vegetation coverage grade land type area, express urbanization process with construction land, analyze relationship between temporal spatial evolution characteristics expansion. results indicate that: (1) overall distribution consistent, showing a characteristic "high in east, low west, lowest north". (2) During period, area medium low, medium, high decreased, while both areas increased. (3) has increased significantly, built-up coming bare followed by water bodies. (4) spatio-temporal are closely related This can provide reasonable scientific data support an effective decision-making basis for evaluating regional ecological environment, construction, urban development City.