Geodetski list, Vol. 46 (69) No. 2, 1992.
Pregledni rad
Application of Ferrer's Formula for Evaluating the Outer Network Accuracy Where Directions are Measured by the Round of Horizontal Angles
Brankica Cigrovski-Detelić
; Geodetski fakultet Sveučilišta u Zagrebu, Zagreb, Hrvatska
Sažetak
Research has been carried out on the influence of algebra correlation upon the accuracy of calculating the mean error after Ferrer's formula for the network in which the directions are measured by the round of horizontal angles. When the correlation between the discordance in the closing of the triangles and the measured directions is neglected, the value of the mean error is changed significantly, the level of the significance being α = 0.05. The Ferrero formula in this case does not give a precise but rather an approximate solution, the accuracy of evaluating the correlated measurements thus depending on the strictness of the procedure, i.e. the solution of the figure conditional equation presuming that ∑vv = minimum. The level of significance being α = 0.01, Ferrer's formula yields a sufficient degree of accuracy, i.e. in this case the influence of algebra correlation with the accuracy of applying the formula may be neglected.
Ključne riječi
Hrčak ID:
292656
URI
Datum izdavanja:
30.6.1992.
Posjeta: 275 *