摘要
对于1∶1 000大比例尺成图精度,无人机航测利用差分GPS技术可以达到正射影像图精度要求,但地形图高程精度却往往达不到,针对上述问题,提出一种二次多项式拟合模型予以解决。试验表明:通过该方法求出各点高程坐标改正值,对改正前后的高程值进行对比,其高程精度得到了明显提高。
For the large scale 1∶1000 mapping accuracy,the UAV aerial using the differential GPS technique can achieve orthophotomap precision,but the precision of terrain elevation is often fail,in view of the above problems,put forward a kind of quadratic polynomial fitting model to solve it.The experiment shows that the elevation correction value of each point is obtained by this method,and the elevation precision is improved by comparing the elevation values before and after correction.
作者
宋金元
岳春芳
王健
SONG Jinyuan;YUE Chunfang;WANG Jian(College of Water Conservancy and Civil Engineering,Xinjiang Agricultural University,Urumqi 830052,China;Xinjiang Production and Construction Corps Survey and Design Institute,Urumqi 830052,China)
出处
《测绘与空间地理信息》
2019年第10期213-217,共5页
Geomatics & Spatial Information Technology
关键词
无人机航测
差分GPS
地形图高程精度
大比例尺
二次多项式拟合模型
UAV aerial photogrammetry
differential GPS technique
elevation accuracy of topographic map
large scale
quadratic polynomial fitting model
