本文利用武汉测绘科技大学摄影测量与遥感系研制的联合平差程序WuCAPS系统，对按严格作业要求进行的西安地籍加密测区的两个规则小区摄影测量加密的若干精度问题进行了研究。通过对测区的自检校光束法医域网平差计算得出：区域网加密的内精度（各个像对相对定向单位权中误差之乎均值）为±3.2m，区域网光束法乎差后的单位权 中误差为±5.0～±6.0m，这些已达刊国际先进水平。平差坐标的理论精度为鬲=1.7，ū=4.6，实际精度为r=4.2、=5.9。经过对平差坐标残差的最小=乘配置后坐标精度为=3.2，ū=5.8，这些数值与国外结果仍然有差距，文中分析了产生这种绝对精度差异的原因。此外，还给出了用国产1022胶片进行部分试验的结果。

It is common knowledge that we can solve the elements of interior orientation x0, y0, f of aerial camera in collinearity equation with enough ground control points. However, in the case of vertical photography, the solution of the normal equation may be faced with singularities because x0, y0, f and XS, YS, ZS offet each other. Therefore, the conventional aerotriangulation solves only the elements of exterior orientation, ω, κ, XS, YS, ZS of photograph, whereas the elements of interior orientation x0, y0, f of aerial camera are often determined in the laboratory. As the laboratory methods can not take into full account the actual conditions in aerophotography, large deviations often occur. This paper raises two kinds of GPS-supported determination methods for the elements of interior orientation of aerial camera for the first time. The basic formula are derived from GPS-supported single-image resection in space and GPS-supported bundle block adjustment. A set of actual determination results obtained by camera Wild RC-20 with GPS data from the test field in Taiyuan are given and discussed. The test has confirmed that the two presented methods are correct in theory and efficient in practice. If several pictures with carrier phase measurements are taken over a high precision test field before and after an airphotographic mission, the elements of interior orientation of aerial camera can be determined by using GPSsupported single-image resection in space. The determination method of interior orientation elements in GPS-supported bundle block adjustment does not pose any major problem for photogrammetric adjustment but can efficiently correct the systematic errors caused by the high dynamic aerophotography. To summarize the investigations in this paper can obtain that the dynamic determination methods for the elements of interior orientation will eventually replace the conventional photogrammetric operation method where the camera calibration is independent of photo orientation, and revolutionary changes will take place in the conventional aerotriangulation which had lasted 60 years and more.