Based on the method expressing the positional uncertainty of point entities in surveying and mapping uncertainty ellipse was employed to characterize the uncertainty region for the error dispersal of 2D target 's position and uncertainty ellipsoid for the 3D target .

借鉴测绘学科中衡量点元位置不 确定性的方法，分别用 椭圆和椭球来表示二维目标和三维目标的位置误差散布的不确定性区域。