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 12 of 12 for “"airborne laser scanning"”.
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Combined use of airborne laser scanning and hyperspectral imaging for forest inventories
… area, species, etc..) from the combination of Airborne Laser Scanning (ALS) and Hyperspectal Imaging (HI). The research is centered around three main topics: the development of new individual tree segmentation algorithms, the assessment of direct and indirect dendrometry methods, tree species …
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Archaeological remote sensing: visualisation and analysis of grass-dominated environments using airborne laser scanning and digital spectral data
The use of airborne remote sensing data for archaeological prospection is not a novel concept, but it is one that has been brought to the forefront of current work in the discipline of landscape archaeology by the increasing availability and application of airborne laser scanning data (ALS). It is …
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EXTRAÇÃO DE VARIÁVEIS DENDROMÉTRICAS DE FLORESTA URBANA UTILIZANDO DADOS DE LASER AEROTRANSPORTADO
… variables from an urban forest using Airborne Laser Scanning (ALS) data. The study area corresponds to the Condomínio Parque Residencial Vivenda do Imbuí, located in Salvador, Bahia, Brazil, and was selected for its diverse tree population in an urban environment. The methodology …
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Männyn neulaskadon arviointi laserkeilauksella
… of this study is to investigate the usability of airborne laser scanning in estimating Scots pine defoliation caused by the common pine sawfly (Diprion pini L.). The study area is situated in Ilomantsi district, eastern Finland. Study materials included high-pulse airborne laser scannings from …
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Tracking Forest Height Growth Over Time with ICESat-2 ATL08
… (R2 = 0.88, RMSE = 2.64 meters) with coincident airborne laser scanning. Because ICESat-2 covers different locations each year, equivalence tests were used to ensure year-to-year samples were spatially comparable. Equivalence tests show that locations sampled by ICESat-2 are equivalent within a …
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Three-Dimensional Building Reconstruction from Raw LIDAR Data
Airborne Laser Scanning is an advanced surveying technology (also called Light Detection and Ranging - LIDAR) which mounts a laser scanner on an aircraft. The aircraft scans the Earth's surface and captures data by emitting and receiving light pulses transmitted onto the terrain objects. The …
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Estimating forest attributes using laser scanning data and dual-band, single-pass interferometric aperture radar to improve forest management
… using small-footprint, multiple-return airborne laser scanner (lidar) data, and (2) ascertain whether leaf area index in temperate mixed forests is best estimated using multiple-return airborne laser scanning (lidar) data or dual-band, single-pass interferometric synthetic aperture radar …
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Real-Time Realization of Lidar – Based Digital Surface Models for Airborne Safe Landing Zone Identification in Challenging Environments
… addressed robust filtering algorithms for the airborne laser scanning (ALS) data. Although most of these filtering algorithms are accurate and robust, they are limited to post-processing since they rely on computationally expensive algorithms and require high execution time that is not suitable …
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An assessment of archive stereo-aerial photographs for 3-dimensional reconstruction of damaged and destroyed archaeological earthworks
… assessment using independent survey data, namely Airborne Laser Scanning (ALS) gathered by the Environment Agency, and ground-based collection using Global Navigation Satellite Systems (GNSS) and Terrestrial Laser Scanning (TLS). Empirical differences between these independent data and the SAP …
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Hydrodynamic Effects of Salt Marsh Canopies and their Prediction using Remote Sensing Techniques
… operating a moving average smoothing filter on Airborne Laser Scanning (ALS) data. The automated procedure detected vegetated and non–vegetated surfaces using aerial NDVI which calibrated the filter and ensured ALS returns were representative of marsh surface elevation. Using the marsh surface …
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Assessing age-height relationship using ICESat-2 and Landsat time series products of southern pines in southeastern region
… of ICESat-2 heights with heights derived from airborne laser scanning acquisitions (ALS) available through the USGS 3D Elevation Program. The resulting R2 was 0.82, giving us confidence in the ICESat-2 ATL08-derived forest heights. Then, through data processing and analysis, we successfully …
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Object-based image analysis for detecting landforms diagnostic of natural hazards
… a topographic roughness measure derived from an airborne laser scanning (ALS) digital terrain model (DTM) and discuss its performance in detecting landforms principally diagnostic of natural hazards. I further develop OBIA-based algorithms for the detection of snow avalanches using near-infrared …