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 20 of 25 for “"Terrestrial LiDAR"”.
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Tracking Human Movement Indoors Using Terrestrial Lidar
… Tech as a case study, this research leverages 11 terrestrial lidar sensors to develop a dynamic digital model that continuously captures human activities within public spaces of the building. Three distinct object detection methodologies were evaluated: deep learning models, OpenCV-based …
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Feature Extraction Workflows for Urban Mobile-Terrestrial LiDAR Data
Mobile Terrestrial LiDAR (MTL) is an active remote sensing technology that uses laser-based ranging and global positioning systems (GPS) to record 3D point location measurements on surfaces within and near transportation corridors, such as along a railroad track or a street. This thesis examines …
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Geometric accuracy evaluation of mobile terrestrial LIDAR surveys with supporting algorithms
<p>Mobile Mapping System (MMS) technology is widely used for many applications, hence quantifying its accuracy is a very important and essential task and is a primary focus of this research. In general, to perfrom geometric accuracy evaluation of MMS data, validation points/features are needed. A …
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Automated segmentation, detection and fitting of piping elements from terrestrial LIDAR data
… the invention of light detection and ranging (LIDAR) in the early 1960s, it has been adopted for use in numerous applications, from topographical mapping with airborne LIDAR platforms to surveying of urban sites with terrestrial LIDAR systems. Static terrestrial LIDAR has become an especially …
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Using Geophysics and Terrestrial LiDAR to Assess Stormwater Parameters in Vacant Lots in Philadelphia
… in north Philadelphia. The dataset includes terrestrial LiDAR, ground penetrating radar, soil moisture sensor, surface compaction, and double ring and mini disk infiltrometer measurements. These data were used to establish what controls infiltration rates in the area and also provide input …
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Analysis of microtopography, vegetation, and active-layer thickness using terrestrial LIDAR and kite photography, Barrow, AK
… to microtopography and landcover. In 2010, terrestrial LIDAR was used to collect high-resolution elevation data for four 10 m × 10 m plots where maximum active-layer thickness (ALT) and elevation have been monitored on an annual basis since the mid-1990s and had been monitored in the 1960s …
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Analysis of microtopography, vegetation, and active-layer thickness using terrestrial LIDAR and kite photography, Barrow, AK
… to microtopography and landcover. In 2010, terrestrial LIDAR was used to collect high-resolution elevation data for four 10 m × 10 m plots where maximum active-layer thickness (ALT) and elevation have been monitored on an annual basis since the mid-1990s and had been monitored in the 1960s …
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Characterization of fluvial facies distributions and cyclicity using terrestrial lidar: Paleocene Nacimiento Formation, Kutz Canyon, New Mexico
… New Mexico, by employing fully georeferenced lidar intensity data collected from a terrestrial lidar scanner and an outcrop surface model constructed from the lidar data and calibrated digital field photographs. At this location, the lidar intensity data are responsive to lithology and …
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Detection and elimination of rock face vegetation from terrestrial LIDAR data using the virtual articulating conical probe algorithm
"A common use of terrestrial lidar is to conduct studies involving change detection of natural or engineered surfaces. Change detection involves many technical steps beyond the initial data acquisition: data structuring, registration, and elimination of data artifacts such as parallax errors, …
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BUILDING A BETTER TRAINING IMAGE WITH DIGITAL OUTCROP MODELS: THESE GO TO ELEVEN
… outcrop analog-based approach utilizing terrestrial lidar and high-resolution, calibrated digital photography is combined with lithofacies analysis to produce TIs. Terrestrial lidar scans and high-resolution digital imagery were acquired of a Westwater Canyon Member, Morrison Formation …
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Porosity Development Within Lobes to Downslope Ramp Deposits on a Prograding Carbonate Shelf of the Kinderhookian to Osagean Series in Northwest Arkansas
… pattern in the grains was recorded. The use of Terrestrial LiDar scans that were captured four years ago were used to determine stratigraphic pattern, bedding planes and orientation of inaccessible quarry walls of the study areas. Terrestrial LiDar allows improvements of current field methods by …
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Fidelity versus Scalability: Deep Learning in Forest Remote Sensing
… measurements. I use ultra high-fidelity terrestrial LiDAR to derive ground truth annotations for a common intermediate step in such approaches -- aerial instance segmentation -- and use these labels to show that accuracy is falsely inflated when measured using hand-drawn annotations. I …
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Accuracy Improvement of Terrestrial Mobile Lidar System in Engineering Surveys
… were developed to improve the accuracy of terrestrial mobile LiDAR solutions in the field of engineering surveys. A detailed analysis for error budget of the terrestrial mobile LiDAR system has been presented in order to well interpret the effects of individual error sources. Firstly, the …
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Survey Techniques to Examine Morphological Evolution of Coastal Regions
… a GPS-equipped backpack and occasionally with a lidar equipped drone. Surveys of the northern region of interest also were collected with a stationary terrestrial lidar mounted on the dune. The observed morphological events include the destruction and formation of a cusp field during which there …
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Toward the detection of landscape features : clustering 3D points using spatial and thematic characteristics
… the experimental methods to grouping real-world terrestrial LiDAR scan data. Though my new spatial relationship variable needs improvement, the methods yielded groups of points representing features in the LiDAR data and provided evidence of the potential for grouping richly attributed 3D points …
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Three-dimensional wildland fuel mapping with remote sensing and machine learning
… address this research gap by using airborne and terrestrial LiDAR (ALS, TLS; respectively) and machine learning to make fine scaled predictions of fuels beneath the canopy. In my first chapter I use a gradient boosting regressor to boost the signal of ALS at the surface floor by using the ALS …
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Quantifying Channel Responses to the Removal of the Glines Canyon Dam in the Middle Reach of the Elwha River, Washington
… that occurred was quantified by using repeat Terrestrial LiDAR (TLS), sediment distribution surveys, and large woody debris mapping techniques. The morphologic changes that occurred during this time were caused by multiple different geomorphic influences. The most notable was the initial …
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