A value used to indicate the best angle between the photographs that image an Object Point.
The 3D position of an Object Point is computed by intersecting light rays from photographs. When the light rays intersect at a small angle the accuracy of the computed point tends to be less accurate because it is more susceptible to small errors.
If we call the angle between light rays j and k that are used to compute point i as Aijk then the angle maximum is computed as:
Angle maximum for point i = maximum ( Aijk for all j and k on point i)