The production material makes an attempt to establish the relationship between the heights of the triangulation points above sea level and the values of the mean square error of measuring horizontal angles.
1. Provorov K. L. O tochnosti sploshnyh setej trianguljacii. M., Geodezizdat, 1956, s. 10—11.
2. Puzanov S. I. Nekotorye voprosy tochnosti uglovyh izmerenij v trianguljacii 2 i 3 klassov. «Sbornik nauchno-teoreticheskih i proizvodstvennyh statej po geodezii, ajerofototopografii i kartografii», 1969, vyp. 24. M., s. 70—80.