基于GEE的山西省土地利用时空演变分析

Analysis of Spatiotemporal Evolution of Land Use in Shanxi Province Based on GEE

快速、准确获取土地利用变化信息是实现区域可持续发展的基础。基于谷歌地球引擎(Google Earth Engine,GEE),分析山西省1986—2022年土地利用变化。结果表明,随机森林算法得到的土地利用分类结果精度较高,山西省土地利用类型中,耕地、林地和草地占主导;37年间,山西省土地利用类型变化最大的为建设用地,增长的建设用地主要为耕地转化,水域面积逐渐减小,林地与草地面积变化不大;山西省土地利用程度呈现“中部高、东西低”的特点,主要受到社会因子的影响,人口数量影响最大。

Rapid and accurate acquisition of land use change information is the foundation for achieving regional sustainable development.Based on Google Earth Engine(GEE),the land use changes are analyzed in Shanxi province from 1986 to 2022.The results show that the land use classification results obtained by the random forest algorithm have high accuracy,and in Shanxi province,cultivated land,forest land,and grassland are the dominant types of land use;over the past 37 years,the largest change in land use types in Shanxi province has been in construction land,with the main increase in construction land being cultivated land conversion,and the water area has gradually decreased,while the forest and grassland areas have not changed much;the land use level in Shanxi province shows a characteristic of“high in the central region and low in the east and west”,mainly influenced by social factors,with the greatest impact being on population size.