在全站仪测定一定数量的3维控制点后，利用数码像机进行近景摄影测量，加密测绘水轮机转轮叶片。
After having measured some 3d control points by total station, the digital close range photogrammetry and surveying the Vance of water wheel can be made.
本文推导了星载测定外方位元素参与下，无地面控制点卫星摄影测量高程误差估算公式。
This paper deduces elevation error estimating formulae of the satellite photogrammetry, which is concerned with elements of exterior orientation that measured by spaceborne sensors.
利用GPS虚拟网络参考站定位系统，以厘米级精度测定校正遥感图像的地面控制点。
By means of GPS dummy network reference station positioning system, the ground control points for the calibration of remote sensing image were surveyed with the precision of centimeter level.
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