AbstractNow that it is becoming commonplace to measure the lengths of traverse legs by means of Electronic Distance Measurement equipment, several surveyors have asked the author how best the method of least squares adjustment of a traverse, suggested in a previous article, [2], can be modified so that weights assigned to distance measurements are sensitive to the zero error of the E.D.M. instrument used. This article suggests a means whereby this may be done, and illustrates the method by a numerical example. Eleven commercial traverses are analysed, in which the E.D.M. instrument used was a Wild DI.10 Distomat, and the variations between the Least Squares solution and the Bowditch method are shown.