The Study of 3D Modelling of Peltophorum Pterocarpum with Terrestrial Laser Scanner
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Abstract
The creation of three-dimensional models using a terrestrial laser scanner is a method of collecting data on objects and structures. By employing this technique, the distance between the instrument and objects is determined based on the travel time of laser light, resulting in the representation of three-dimensional coordinate points known as a "point cloud". In this study, this technology wasused tocollect dataonnine Peltophorum Pterocarpum trees at Kasetsart University. The study found that the three-dimensional models of the Peltophorum Pterocarpum trees could accurately depict the trunk and canopy, including cross-sectional profiles of the entire trunk. The basal area at breastheight, derived from the 3D model, was compared withfour different methods: the caliper method, automatic DBH by the 3D Forest program, tree contour tape measurements, and tape measurements along the convex shape.The results indicated that there was no statistically significant difference betweenthe basal area calculated from thecaliper method and the automatic DBH by the 3D Forest program when compared to the reference data (p>0.05). Furthermore, the heightof the trees was measured using botha 3D model and a total station, and the averageheight obtained from both methods did not show any significant differences (p>0.05). These three -dimensional models can be used to compare growth patternsor changes in each tree over the years. Additionally, this research can guide further studies in accurately assessing the dimensions of trees with high precision.
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