Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 6 of 6 for “"stem map"”.
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Discovetree - An Automated Tool To Generate Stem Maps From Terrestrial Laser Scanner Point Clouds
… step in tree segmentation is the creation of a stem map consisting of the position and size of all trees in the point cloud. We developed a novel stem mapper, "Discovetree" that uses Hough transforms combined with a machine learning algorithm calibrated with field data. Our algorithm …
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Heterogeneity of Stand Structure, Fuels, and Wildfire Hazard in Dry and Moist Old-Growth Ponderosa Pine Forests: Case Studies from Western Montana
… value. Spatial analysis tools used with stem map data (more typically used in the forest ecology literature) from the same sample area supported our observations derived from the fixed-area plot data that is more commonly collected by managers. This analytical approach provides a more …
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Heterogeneity of Stand Structure, Fuels, and Wildfire Hazard in Dry and Moist Old-Growth Ponderosa Pine Forests: Case Studies from Western Montana
… value. Spatial analysis tools used with stem map data (more typically used in the forest ecology literature) from the same sample area supported our observations derived from the fixed-area plot data that is more commonly collected by managers. This analytical approach provides a more …
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Absolute localization of mobile robots in forest environments by correlating ground LiDAR to overhead imagery
… based on finding a geometric match between a map of observed tree stems, scanned in 3D by Light Detection and Ranging (LiDAR) sensors onboard the vehicle, to another stem map generated from the structure of tree crowns analyzed from aerial orthoimagery of the forest canopy. Identification of …
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Potential for unmanned aerial systems to inform ponderosa pine restoration: evaluation of horizontal and vertical complexity monitoring
… forest management. Recently, Unmanned Aerial Systems (UAS) remote sensing has emerged with potential methods for bridging this gap. Specifically, photogrammetric Structure from Motion (SfM) algorithms have been shown as a cost-efficient way to characterize forest structure in 3-dimensions. …
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Modeling Forest Canopy Distribution from Ground-Based Laser Scanner Data
… including diameter at breast height (dbh), upper stem diameters, branch heights and XY positions of trees on the plot. Estimated tree positions were, on average, within 0.4 m of tree positions measured independently on the plot. Canopy height models, digital terrain models and 3D maps of the …