摘要
谷歌地球影像的平面几何精度是决定其应用水平的重要因素.以许昌市为研究区,利用GPS-RTK技术,获取该区域近5年内未发生变化地物点的高精度大地坐标.从单点定位误差、距离误差、角度误差和面积误差四个方面,检验研究区不同时间的三景谷歌地球影像的平面几何精度.研究结果表明,谷歌地球影像的平面定位误差平均值约为2.82 m,距离误差平均值约为0.12 m,角度误差平均值约为-0.0003°,面积相对误差平均值约为1/14286.该结论证明谷歌地球影像具有较高平面几何精度.
The geometric accuracy of Google Earth image is an important factor to determine its application level.Taking Xuchang city as an example,GPS-RTK technology is used to obtain high-precision geodetic coordinates of the unchanged objects in the past five years.Positioning,distance,angle and area errors are calculated to verify the plane geometric accuracy of three Google Earth images in different times.The results show that the mean of positioning error is about 2.82 m,the average distance error is about 0.12 m,and the average angle error is about-0.0003°,and the average area relative error is about 1/14286,which proves that Google Earth image has a high plane geometric accuracy.
作者
李慧娜
邢南帝
韩杰
苗宝亮
石宏斌
LI Huina;XING Nandi;HAN Jie;MIAO Baoliang;SHI Hongbin(School of Electrical and Mechanical Engineering(Engineering Training Center),Xuchang University,Xuchang 461000,China;School of Urban and Environment Sciences,Xuchang University,Xuchang 461000,China;96608 Troops of PLA,Luoyang 471000,China)
出处
《许昌学院学报》
CAS
2020年第5期32-36,共5页
Journal of Xuchang University
基金
2020年许昌学院科研项目(2020YB007)
河南省科技攻关项目(182310924
202102310015)。
