Comparison of linear and angular measurements accuracy in mixed geodetic networks

The installation of a linear-angular geodetic network requires the realization of linear and angular measurements contrary to the other methods (triangulation or multilateration) for which it is necessary to measure either the angles or the distances. The question then arises of the relationship between the accuracies of linear measurements and those of angular measurements. It will be a question of comparing the deviations of the measurements carried out according to the arrangement of the points of the network. The experiments carried out on different shapes of figures (disposition of the points of the network) make it possible to formulate the following conclusion: In the linear-angular geodetic networks, in order to obtain linear and angular measurements equivalent in precision, it is necessary that for a given error on the angular measurements, linear measurements give the same relative error.