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 37 for “"NLCD"”.
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A method for identifying commission and omission errors for cultivated crops in the national land cover dataset (NLCD) 2006
… United States National Land Cover Database (NLCD), developed from the early 1990s to 2006, is an important resource for monitoring the nation’s land cover change. In this research, I developed a method that identifies and analyzes the commission and omission errors for two agricultural …
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Analysis and Comparison of a Detailed Land Cover Dataset versus the National Land Cover Dataset (NLCD) in Blacksburg, Virginia
… assessments on the National Land Cover Dataset (NLCD), little research has utilized a detailed digitized land cover dataset, like that available for the Town of Blacksburg, for this comparison. This study aims to evaluate the information available from a detailed land cover dataset and compare it …
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A Comparison of Imperviousness Derived from a Detailed Land Cover Dataset (DLCD) versus the National Land Cover Dataset (NLCD) at Two Time Periods
… concerns of the National Land Cover Dataset (NLCD), this case study compares impervious surface from the NLCD to a Detailed Land Cover Dataset (DLCD) for the Town of Blacksburg, Virginia over two time periods (2005/2006 and 2011) at spatial aggregation scales (fine to coarse) and scopes …
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Estimating Impervious Surface Cover in Flathead County, Montana
… Neural Network model was developed to update NLCD impervious surface product (2011) in Flathead County, Montana. Four Landsat 8 images from 2015 and 2016 were used to characterize imperviousness. This multi-temporal analytical method was designed to reduce the spectral confusion between …
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Assessing annual urban change and its impacts on evapotranspiration
… policy-making. The National Land Cover Database (NLCD) provides land use land cover data covering the entire United States, and it is widely used as land use land cover data input in numerous environmental models. One major drawback of NLCD is that it is updated every five years, which makes it …
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An Examination of the Reference Watershed Approach for TMDLs with Benthic Impairments
… the RWA, do different land use sources (DOQQ and NLCD) or use of alternative water quality models (GWLF and SWAT) result in different stressor loadings? Is there a difference in stressor loadings when different reference watersheds are used? Study results showed that using different land use …
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Detecting Impervious Cover with Artificial Lighting in Astronaut Photography from the International Space Station
… imagery to 2016 National Land Cover Database (NLCD) Degree of Imperviousness ground reference data on the basis of low, medium, and high urban density. Difference images between reclassified ISS images and the NLCD reference data for low, medium, and high imperviousness were calculated with up …
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Examining Avian Communities in Wetlands at Multiple Spatial Extents
… (BBS) and the National Land Cover Database (NLCD) to develop a set of spatially-explicit abundance models for each of 31 species of wetland-breeding birds. Independent variables in these models included combinations of three different aquatic habitats as well as other land cover types that …
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Ecosystem services provided by agricultural land as modeled by broad scale geospatial analysis
… (RYE) database, and the land cover datasets NLCD and CDL. Furthermore I sought to model tradeoffs between provisioning and other services. First I assessed the accuracy of agricultural land in NLCD and CDL over a four county area in eastern Virginia using cadastral parcels. I uncovered issues …
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Canopy Characteristics Affecting Avian Reproductive Success: The Golden-cheeked Warbler
… Geological Survey National Land Cover Dataset (NLCD) and from field sampling. The NLCD provided data on canopy closure and tree species composition at a 30 m resolution. Additionally, I used spherical densitometers and transect evaluations to ground-truth data and take more detailed …
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VIrginia Urban Dynamics Study Using DMSP/OLS Nighttime Imagery
… ancillary data sources from the U.S. Census and NLCD imagery.
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Urban Land Use Efficiency in the United States: Assessing UN 2030 Sustainable Development Goals
… to Population Growth Rate (PGR). Leveraging NLCD Impervious Surface data and WorldPop population estimates, the study calculates the LCRPGR indicator for 2,229 urban areas and examines regional and temporal trends. Results indicate that urban land area increased by 23% over two decades, while …
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Geospatial Assessment of Port Infrastructure and Computational Modeling of Coastal Disasters
… and the 2011 National Land Cover Database (NLCD) were implemented to determine an efficient method for identifying and mapping the built infrastructure, land use features and non-built areas. The study sites included the greater metropolitan area of Los Angeles, the Port of Miami and …
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Land Use and Land Cover Change in the Crown of the Continent Ecosystem, Montana, USA from 1992-2011
… Using National Land Cover Database (NLCD) products, I identified areas that have experienced land cover change for three time periods: 1992-2001, 2001-2006, and 2006-2011. Additionally, I used case studies to further investigate LULCC in the study area. The findings suggest that the …
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Calibration of an Artificial Neural Network for Predicting Development in Montgomery County, Virginia: 1992-2001
… for Montgomery County, Virginia. Using NLCD Retrofit Land Use data for 1992 and 2001 as base layers for urban change, we assess the sensitivity of the model with policy-influenced variables from data layers representing road accessibility, proximity to urban lands, distance from urban …
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Identifying Biophysical Drivers of Evapotranspiration for Forest Cover in a Mountainous Region
… types from the National Land Cover Database (NLCD) and quantifying relative differences among land covers. Within forested land covers specifically, I further examined how topographic, soil, and vegetative factors influence ET variability. Generalized Least Squares and Random Forest models …
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Effect of Scale on Habitat Selection of Female White-Tailed Deer in the Central Black Hills, South Dakota and Wyoming
… South Dakota GAP, National Landcover Dataset (NLCD), and Black Hills National Forest, despite poor agreement among them. I attribute this agreement in deer habitat selection among vegetation maps to vegetation structure being more important to white-tailed deer habitat selection than species …
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Fynbos connectivity as a function of dispersal distance and the implications for bird conservation in the greater Cape Town area
… outlined by the National Land Cover Database (NLCD 2000) and analysed as a function of organism dispersal ability in the greater Cape Town area. It is shown that a relationship between dispersal ability and connectivity exists; however the relationship is not linear but sigmoidal with …
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Land Cover Quantification using Autoencoder based Unsupervised Deep Learning
… United States National Land Cover Database (NLCD) classification standard.
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Relationships between Forest Productivity and Water Yield Across Virginia's Forests
… using annual National Land Cover Database (NLCD) land cover products. Net primary productivity, or carbon allocated to plant biomass after losses from respiration, was acquired using the MOD17 algorithm applied to Landsat (30-m resolution) and MODIS (250-m resolution) imagery. Water yield …
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