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The Diameter at Breast Height(DBH) is the basic data among the essential items of forest management. Existing DBH survey have generally been made manually. But this way can cause personal and has a disadvantage that it is difficult to measure when the shape of the tree is irregular. In recent years 3D laser scanning method has been introduced in the field of forestry. In this study, DBH and tree height were measured using a 3D laser scanner. Data on the forests studied were obtained using hand-held scanners and DBH and tree height were measured. Additionally obtained data on felled trees was also performed software measurements, and compared the measurements with calipers. The DBH measurement showed a deviation of less than 4 cm compared to the caliper measurement. This result indicates that the DBH can be measured using a hand-held scanner. And measuring a 1.2 m high diameter is difficult in the field, so using a handheld scanner will improve work efficiency. The tree height was within 10 cm of the reference. Although the reference was measured using the total station for accurate measurement, the error of the clinometer used in the field is likely to occur, and the tree height measurement using the hand held scanner may improve the accuracy of the measurement. Further research and measurement automation in the future, the scanner-based method that can be used to reduce noise will be used to measure the diameter of a log tree.

Application of Handheld Scanner to Investigate Diameter at Breast Height and Tree Height