数字成图系统中，须对规则地物进行几何纠正。本文论述了方形建筑物其条件方程个数的确定、垂直或平行条件方程的建立和点的增补等问题；对圆形建筑物采用附有未知数的条件平差模型来进行处理。数据点的粗差处理也进行了一些阐述，从闭合差和统计检验两方面来进行处理。作者编制了相应的程序，表明此法是可行的。 Digital mapping system, the geometry of the rules must be corrected. This paper discusses the determination of the number of conditional equations, the establishment of vertical or parallel conditional equations and the addition of points in a square building. The circular building is conditioned by a conditional adjustment model with unknowns. The gross error of data points is also dealt with some elaboration, from the closed error and statistical tests to deal with two aspects. The author prepared the corresponding procedures, indicating that this method is feasible.