以往,对山区航空象片的转绘一般用辐射线格网法。因这种方法较麻烦,从而没有得到广泛应用。使用航空象片转绘仪进行山区航空象片转绘,必须将一座山划分成几个等坡平面(等坡面的多少取决于转绘允许误差)。而在每一个等坡面中又必须保证有四个以上的明显地物点作为纠正定向控制点,每次又只能在一个等坡面内对好点来进行转绘。这样,转绘精度要求愈高,地形愈复杂,等坡面就划分得愈多,纠正对点和转绘就非常繁杂,用 In the past, the transfer of mountain aerial photos generally used radiation grid method. Because of this method is more troublesome and therefore not widely used. The use of an aerial photogrammetry instrument for the mapping of mountain aerial photographs necessitates the division of a mountain into several equatorial planes (the slope of which depends on the allowable error of the drawing). In each slope, however, it is also necessary to ensure that there are more than four distinct objects as corrective directional control points, each of which can only be traced back to a good point at a time. In this way, the higher the accuracy of the transfer drawing, the more complex the terrain, the more the slope is divided, the correction of the point and the transfer is very complicated,