李德仁. 地面坐标作为带权观测值的空间后方交会与验后权估计[J]. 武汉大学学报 ( 信息科学版), 1981, 6(1): 52-62.
引用本文: 李德仁. 地面坐标作为带权观测值的空间后方交会与验后权估计[J]. 武汉大学学报 ( 信息科学版), 1981, 6(1): 52-62.
Li Deren. On the space Resection With Ground Coordinates as Weighted Observations and a Posteriori Weight Estimation[J]. Geomatics and Information Science of Wuhan University, 1981, 6(1): 52-62.
Citation: Li Deren. On the space Resection With Ground Coordinates as Weighted Observations and a Posteriori Weight Estimation[J]. Geomatics and Information Science of Wuhan University, 1981, 6(1): 52-62.

地面坐标作为带权观测值的空间后方交会与验后权估计

On the space Resection With Ground Coordinates as Weighted Observations and a Posteriori Weight Estimation

  • 摘要: 本文讨论了验后方差估计在单象空间后方交会中的应用。此时所要估计的是地面坐标和象片坐标的权。如果地面坐标有相同的方差,譬如人工标志点,则我们可将地面点视为固定点而不必作为带权观测值,且不需要进行验后方差估计。但是,若地面坐标的方差不等,譬如采用自然点(需要辨认和转剌)的情况,则必须将它们作为带权观测值逐点进行方差估计。采用这种方法可以提高平差结果的精度。

     

    Abstract: This paper deals with the application of a posteriors variance estimation in space resection of a single photograph.In this case the weights to be estimated are those of the ground coordinates and of the image coordinates.If the ground coordinates have equal variances such as the signalized points,we may consider them as fixed points rather than weighted observations and needn't perform a posteriors variances estimation.But if their variances are not equal,such as in the case of using natural objects(the images of which have to be identified and transferred),they should be regarded as weighted observations and their variances should be estimated point by point.In this way the accuracy of adjusted results can be improved.

     

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