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 16 of 16 for “"Inverse Distance Weighting"”.
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Modeling forest stand structure using geostatistics, geographic information systems, and remote sensing
… estimation methods (polygonal mapping, inverse distance weighting, and inverse distance weighting squared). These eight techniques were used to spatially interpolate the number of stems, total basal area, and number of seedlings on 82 sample plots in a 121-hectare first-order forest …
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A comparison of geostatistcal interpolation methods for the characterization of background radiation collected on a mobile sensor network in a cloud computing environment
… of two methods of geospatial interpolation, Inverse Distance Weighting and Kriging, on background radiation in a cloud computing environment are evaluated in this thesis, and recommendations on data collection and interpolation methods for ideal background characterization are provided.
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A Comparative Study of Machine Learning and Traditional Techniques for Grade Prediction and Grade-Tonnage Evaluation in a Small VMS Deposit
… Vulcan, and grade estimation was performed using Inverse Distance Weighting (IDW), Simple Kriging (SK), Ordinary Kriging (OK), and ensemble tree models. Traditional methods were assessed using cross-validation within Vulcan, while machine-learning models were evaluated using an independent …
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RF and GIS: Field Strength Prediction for Frequencies between 900 MHz and 28 GHz
… along the Bresenham line is also considered. An Inverse Distance Weighting algorithm was used to interpolate the elevations. The accuracy of the model was evaluated using received signal strength data compiled from studies conducted at 902 MHz, 24.12 GHz and 27.525 GHz. In addition to the …
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Spatial precipitation trends and effects of climate change on the Hawai'ian Hualalai aquifer
… was then compared with spatial interpolation by inverse distance weighting (IDW) and ordinary kriging to assess the differences in methods. Results from the integrated spatial analysis show an annual decrease of -8.42 x 10⁶ m³/year across the entire study area and a decrease of -4.62 x 10⁶ …
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Patrón de distribución espacial de siete especies de valor comercial en áreas de bosques intervenidos y no intervenidos en tres comunidades del municipio El Castillo, Río San Juan
… y el método de interpolación estadística (Inverse Distance Weighting) para determinar el patrón y superficie de distribución de las especies y se relaciono la abundancia de las especies con el tipo de patrón. Los sitios no intervenidos presentaron una estratificación más completa. Producto …
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Assessing indicators of forest sustainability using lidar remote sensing
… spline with tension, regularized spline, inverse distance weighting, and ANUDEM interpolation routines were used to generate surfaces at spatial resolutions of 0.5, 1.0, and 1.5 m. The 0.5 m natural neighbour surface was found to be the most accurate (RMSE=0.17 m). Classification and …
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A Comparison of Spatial Interpolation Techniques for Determining Shoaling Rates of the Atlantic Ocean Channel
… of data points. Nine interpolation techniques (inverse distance weighting, completely regularized spline, spline with tension, thin plate spline, multiquadratic spline, inverse multiquadratic spline, ordinary kriging, simple kriging, and universal kriging) were compared for their ability to …
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Imputación de datos faltantes en redes de distribución de baja tensión: Aplicación a edificios de pública concurrencia
… dentro de otros sectores de actividad como son: Inverse Distance Weighting (IDW), Multiple Linear Regressions Models (MLR Models) y Multiple Imputation by Chained Equations (MICE). En esta primera fase, no solo se demuestra la viabilidad del uso de las citadas técnicas como herramientas capaces …
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Never Smokers -- Are They More Sensitive to the Respiratory Health Effects of Ambient Air Pollution?
… physical exercise, and dietary patterns. Inverse distance weighting (IDW) with interpolation to residence address was used to estimate individual level ambient air pollution. Cumulative monthly and averages from 12 months prior to enrollment until one month before censoring were used.</p> …
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Assessing sustainable water, energy and food nexus smart innovations, technologies and practices in Luvuvhu and Nzhelele River catchments areas, Vhembe District Municipality, Limpopo province, South Africa.
… response frequencies. Additionally, the ArcGIS Inverse Distance Weighting (IDW) spatial interpolation method was employed for spatial analysis. The results indicated that the sustainability of the water-energy-food (WEF) nexus depends on the resilience of each resource individually as well as …
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Three Essays in Applied Econometrics: with Application to Natural Resource and Energy Markets
… maximum likelihood estimator. However, with an inverse distance weighting matrix, the maximum likelihood estimator outperforms the k-Nearest Neighbors method in predicting crop yield.</p> <p>Chapter 3</p> <p> This essay uses the "exceedances over high threshold model" of Davidson and Smith …
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A comparison of spatial interpolation techniques in temperature estimation
… intensive interpolation techniques such as inverse distance weighted averaging, cubic splining, the fitting of a trend surface, polynomial regression, and the lapse rate method. Eight interpolation techniques (inverse distance squared, optimal inverse distance, cubic splining, trend surface …
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GEOGRAPHIC DATA MINING AND GEOVISUALIZATION FOR UNDERSTANDING ENVIRONMENTAL AND PUBLIC HEALTH DATA
… and the spatial interpolation techniques (inverse distance weighting). The three main findings for this study are: first, among the four algorithms ALK, Ward and CLK identified regions effectively than SLK which performed very poorly. The ALK provided more promising regions than the rest of …
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Development of national extent terrain attributes (TANZ), soil water balance surfaces (SWatBal), and environmental surfaces, and their application for spatial modelling of Pinus radiata productivity across New Zealand
… forward spatial interpolation technique, inverse distance weighting (IDW), were compared with those derived using the more complex RK, OK, and PLS techniques. Cross validation showed that all techniques performed better than their respective data means. OK, RK, and IDW techniques were …
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Evaluation of Spatial Interpolation Techniques Built in the Geostatistical Analyst Using Indoor Radon Data for Ohio,USA
<p>According to the United States Environmental Protection Agency, radon is the number one cause of lung cancer among non-smokers, and it is responsible for about 21,000 lung cancer deaths every year in the United States. In the State of Ohio, 14% of lung cancer deaths are caused due to radon. It …