Figure 7From: Solution of underdetermined systems of equations with gridded a priori constraintsA 2D geodetic network and the corresponding observations of distances of Case study 2. Red arrows indicate possible movements of points 2, 3, 4 (degrees of freedom of the system), shaded areas 2-D areas of uncertainty of points. The coordinates of point 1 and the abscissa of point 2 were assumed fixed.Back to article page