Extraction Method of DBH based on 3D Laser Scanner of Single Station

Experiment was carried out on extraction by 3D laser scanner of single station in April, 2018 at greening belt about 1 km long in Lingang Industrial Area of Tianjin, and obtained cloud data was programed by LISP language based on the least-square circle fitting algorithm to automatically extract tree DBH.Determination was implemented on DBH of 39 Populuseuramericana ‘74/76’ and 65 Robiniapseudoacacia for accuracy estimation.The results showed that root mean square error of P.euramericana‘74/76’ was 0.8 cm, that of R.pseudoacacia was 0.7 cm, and the overall root mean square error was 0.7 cm.