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4.1.1. Free network (phase |) computation which means calculation of: 
- the internal reliability which is the boundary value or marginal detectable error 
for each observation; 
- the external reliability. This is the influence of the boundary value on the 
coordinates of the network presented by the square lambda parameter or/and the 
external reliability vector; 
- point standard ellipses and criterion circles. 
4.1.2. Constrained network (phase II) computation which means calculation of: 
- gee 4.1.1; 
- the internal and external reliability of known control points. 
The computation can be performed as a least squares computation or as a pseudo 
least squares computation. The latter means that the control points will not get a 
correction under the adjustment. 
4.2. Adjustment of a network 
There are three inputfiles: 
- a file with approximate values; 
- a file with observations; 
- a file with options. 
The computations can be divided in: 
20387 -