利用资源三号卫星影像的全国田径场遥感监测与分析

Monitoring and analyzing of ground track fields in China using Ziyuan-3satellite images

针对全国田径场空间分异格局未知的情况,该文以资源三号数字正射影像为数据源,采用Deeplab V3+语义分割模型,开展全国田径场遥感监测和空间格局分析,并解析田径场数量与社会经济因子、学生身体素质间的相关性。结果表明:共计提取了89766个田径运动场,田径场提取个数的F1度量为91.43%;省域和市域尺度上田径场的数量、密度和聚集性都符合瑷珲-腾冲人口线,东南半壁省份的田径场数量更多、密度较高、聚集性更弱;整体上东西部城市区域田径场密度相当、乡村区域田径场密度差异显著,西部城市区域、东部平原乡村区域田径场更趋向于均匀分布;田径场分布受到经济与人口因素影响,田径场数量与跑步速度具有弱的负相关性。

Aiming at the problem that the spatial distribution of ground track fields in China was unknown,we monitored and analyzed the spatial distribution of ground track fields across China,using the digital orthophoto map of ZY-3satellite images and the Deeplab V3+model.The correlation between ground track fields,socioeconomic factors,and student physical fitness was also examined.The results showed that a total of 89766ground track fields were extracted,with an F1measure of 91.43%.On the province and city scale,the number,density,and clustering of ground track fields conformed to the Aihui-Tengchong Line,with higher numbers and densities but weaker clustering in southeastern provinces.Overall,the densities of ground track fields in urban areas of eastern and western China were comparable,while the significant differences in the densities of ground track fields were observed in rural areas.The ground track fields in the urban areas of western China and the rural areas of eastern China were more evenly distributed.The distribution of ground track fields was influenced by economic and population factors,and there was a weak negative correlation between the number of ground track fields and running speed.