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Showing 1 to 6 of 6 for “"canopy height model"”.
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EXTRAÇÃO DE VARIÁVEIS DENDROMÉTRICAS DE FLORESTA URBANA UTILIZANDO DADOS DE LASER AEROTRANSPORTADO
… applied for tree detection: one based on the Canopy Height Model (CHM) and the other directly on the three-dimensional point cloud. To validate the results, a field survey was conducted using the Trees Count application, in addition to photointerpretation over an orthoimage. The variable …
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Assessing the utility of NAIP digital aerial photogrammetric point clouds for estimating canopy height of managed loblolly pine plantations in the southeastern United States
… shown to enable accurate estimates of forest height. Lidar does produce precise measurements for ground elevation and forest height, where and when it is available. However, it is expensive to collect and does not have wall-to-wall coverage in the United States. In this study, we estimated …
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Using a ground-based lidar instrument (Echidna ®) to reconstruct three-dimensional forest structure for biophysical and ecological studies
… six 50 m by 50 m forest stands of varying canopy density and species from the Sierra Nevada National Forest, California, and the Harvard Forest, Petersham, Massachusetts, using lidar data acquired in 2008 and 2009. I use commercial software tools to display, manipulate, and produce …
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Estimating Plot-Level Forest Biophysical Parameters Using Small-Footprint Airborne Lidar Measurements
… surface. This study derived the digital terrain model from lidar data using an iterative slope-based algorithm and developed processing methods for directly measuring tree height, crown diameter, and stand density. The lidar system used for this study recorded up to four returns per pulse, with …
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An Object-Oriented Approach to Forest Volume and Aboveground Biomass Modeling using Small-Footprint Lidar Data for Segmentation, Estimation, and Classification
… was used to derive objects from a lidar-based canopy height model (CHM). New segment selection criteria, based on between- and within-segment CHM variance, and average field plot size, were developed. Horizontal point samples were used to measure in-field volume and biomass, for 2-class …
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Large-area forest assessment and monitoring using disparate lidar datasets
… mostly to aid in the creation of digital terrain models and to support hydrological and engineering assessments. Such data is not ideal for forestry purposes mainly due to the low pulse density per square meter, the high scan angles and low swath overlaps associated with these acquisitions. …