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 40 for “"ground truthing"”.
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The Dogma of the 30 Meter Riparian Buffer: The Case of the Boreal Toad (Bufo boreas boreas)
… were located outside buffer zones. After ground truthing and extending 30 m buffers around these habitats, the percentage of all observations within 30 m buffers increased to 92.4%. Managers need to be aware of the accuracy of digital and other mapping sources used in creating buffers and …
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Cross borehole induced polarization to detect subsurface NAPL at the Savannah River Site, South Carolina
… the location of three wells to be used for ground truthing.
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Evaluating dNBR and CBI for Fire Severity Estimation in Fennoscandian Boreal Surface Fires
… the Composite Burn Index (CBI), a field-based ground truthing index, in estimating fire severity following a low- to moderate-intensity surface fire in Fennoscandia. Using a prescribed burn in Leppävirta, Finland as a case study, I compare dNBR to a study-specific, custom index, the …
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Facilitating golden mole conservation in South African highland grasslands : a predictive modelling approach
… trained on sparse museum data records; (ii) ground-truthing field surveys during austral spring/summer to gather additional specimens at additional localities; (iii) genetic analyses (using cytochrome-b) to determine the species identities of the newly-acquired specimens, as these taxa are …
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Aggregate potential of Irish south coast offshore palaeovalleys
… seabed maps using bathymetric data supported by ground truthing sedimentsamples. Surficial sediment deposits display a close fit to industry standard aggregates but considerable temporal variance at depth from vibrocore analysis shows variable marine reworking over time. Marine processes off the …
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Big Data Needs Small Data: Exploring Digital Adaptability of Restaurants in the context of Covid-19 in Boston
… segmentation, identifying the necessity of ground-truthing exercises to validate the quality of the data.
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Late quaternary valley fill sediments in the River Tyne valley: Understanding late Devensian deglaciation and early postglacial response in northern England
… and stratigraphic data vital for ground truthing remotely-sensed landform interpretations. The story of deglaciation in Britain is a complex one and the work here illustrates that we are far from understanding the behaviour of the ice during the last glacial period, and certainly …
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Utilizing Electrical Geophysical Methods to Map Mycorrhizal Mycelium Networks Non-Invasively
… sites, and were confirmed with observational ground truthing. The development of a non-invasive method to study mycelium allows for scientists across a number of fields to more efficiently and more sustainably study these fungal networks.</p>
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Archaeological geophysical prospection in peatland environments.
… survey methods (resistivity, gradiometry, ground penetrating radar and frequency domain electromagnetic) as site prospection and landscape investigation tools in peatland environments. It examines previous attempts to prospect peatland sites, both in archaeology and environmental science. …
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Priming the Pump with Grass, Trees, and Waste: An exploration of biofuels policy and research discourse and its potential to alter living spaces
… by introducing another analytical tool --ground truthing. Geographers and military reconnaissance personnel use ground truthing to describe the process of physically inspecting the lay of the land in order to determine the accuracy of the maps. With this tool, I demonstrate the potential …
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Glacial Geomorphology of southern Alberta, Canada
… picture. Then, Aerial Photo Investigation (API), ground truthing and sedimentary analyses were employed to provide a detailed, localised focus into the landform sediment assemblages in southern Alberta.
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Understanding the negative impacts and benefits of invasive alien populus Alba L: implications for management in South Africa
… the Eastern Cape and Gauteng provinces in 2070. Ground-truthing was conducted to validate model predictions and identify new infestations in Limpopo Province. It revealed 26 new P. alba populations that were hence incorporated in the distribution map. Thirdly, semi-structured interviews were …
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Nitrogen cycling in the subtropical southeast Atlantic and southwest Indian Oceans as recorded by the nitrogen isotopes of modern planktic foraminifera
… includes the first foraminifer- bound δ15N ground-truthing studies from the southeast Atlantic and the Agul- has Current regions and examines the extent to which the unique δ15N signature of Indian Ocean nitrate is preserved in the tissue and shells of foraminifera living in Agulhas leakage …
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Anthropogenic Influence on Blackfin Sucker (Thoburnia atripinnis) Distribution, in the Upper Barren River System, Kentucky and Tennessee
… inhabitance at these sites. Data collection and ground truthing occurred between September 2015 and June 2016. ArcGIS was used to extract land use proportions within 100m and 390m buffers around 41 sites and ERDAS imagine was used to create a supervised and unsupervised classification of the …
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Geodynamic Modeling of Mars Constrained by InSight
… have been provided by InSight would have been ground truthing the heat flow from the interior at the landing site, and this required determining, among other quantities, the thermal conductivity of the regolith into which the heat flow probe (mole) was placed. While the mole could not penetrate …
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BENTHIC HABITAT MAPPING OF MOUNTAIN TOP BANK WITHIN THE NORTHERN GULF OF MEXICO THROUGH INTEGRATED GEOPHYSICAL AND VISUAL DATA ANALYSIS
… Marine Sanctuary (FGBNMS), the Florida Middle Ground reef system, and Pulley Ridge already identified. Mountain Top Bank (MTB), a hardground feature 60-150 m below the sea surface, is a mesophotic reef site off the coast of Mississippi, USA. As it is poorly understood, it is the focus of this …
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Distribution, causes and nature of natural landslides in Devon and Cornwall
… terrain evaluation and limited field mapping for ground truthing purposes. This landslide susceptibility map used probability to assess the relative importance of parameters important to slope stability. The landslide susceptibility map, along with the landslide environments, highlighted areas …
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Seafloor habitat characterization, classification, and maps for the lower Piscataqua River estuary
… on detailed and accurately-georeferenced ground-truth data. The LFH texture feature classification technique, using only gridded bathymetric data, was generally effective for predicting spatial distributions of seafloor morphologies and habitat structure classes on a per-grid-cell basis …
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Stratigraphy, Two-Dimensional Geometry and Internal Sedimentary Structure of Hyaloclastite Deposits in the Siða Formation, SE Iceland; Implications for Mechanisms of Emplacement
… hyaloclastite analysis using photo-mosaics, ground-truthing and sample analysis revealed ‘sheet-like’ and ‘lensoid’ hyaloclastite architectures, in addition to a variety of sedimentary structures (i.e.cross-beds). The two-dimensional geometry of the sheet-like units suggests the emplacing …
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"Perceived neighborhood walkability" and physical activity in four urban settings in South Africa
… activity was collected using accelerometers, and ground-truthing was used to assess the neighbourhood environment using global information systems (GIS) in a 1000m buffer around each geocoded household. The research was carried out in three parts: 1) Evaluating the reliability and construct …
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