If the length and/or bearing of any side of a closed traverse gets omitted, that can be computed analytically by applying.

S departures = (X_n - X₁) --------------- Eq (31.1)

S latitudes = (Y_n - Y₁) ------------------- Eq (31.2)

where (X₁ ,Y₁) and (X_n ,Y_n) are the independent coordinates of initial and terminating control stations. Thus, in any traverse, maximum two omitted parameters can be computed from two available equations. However, no check on the accuracy of the field work can be done nor can the traverse be balanced as errors, if any, present in the survey work get propagated into the computed values of the omitted quantities. So, computation of omitted measurement, if any, is done for during computation of traverses of lower order.

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