In networks of trilateration from triangles, the accuracy of the direction angles of the connecting sides has been studied in detail [1, 2]. The accuracy of the directional angles of the intermediate sides was not considered.
Analysis of the advantages and disadvantages of triangulation and trilateration methods has been done in many works [3-5, 8, 9]. These studies are mainly based on the analysis of networks of a typical design. And the programs of observations in such networks for both methods have the same geometric configuration. The obtained conclusions are valid for geodetic networks with a geometrically localized program of observations. In particular, it can be state geodetic networks, or networks created in heavily built-up areas.