Digital Commons Network^™

Big Data Applications And Challenges In Giscience (Case Studies: Natural Disaster And Public Health Crisis Management), Amir Masoud Forati

Theses and Dissertations

This dissertation examines the application and significance of user-generated big data in Geographic Information Science (GIScience), with a focus on managing natural disasters and public health crises. It explores the role of social media data in understanding human-environment interactions and in informing disaster management and public health strategies. A scalable computational framework will be developed to model extensive unstructured geotagged data from social media, facilitating systematic spatiotemporal data analysis.The research investigates how individuals and communities respond to high-impact events like natural disasters and public health emergencies, employing both qualitative and quantitative methods. In particular, it assesses the impact of socio-economic-demographic …

"The Trees Act Not As Individuals"--Learning To See The Whole Picture In Biology Education And Remote Sensing Research, Rebeka A.F. Greenall

Theses and Dissertations

To increase equity and inclusion for underserved and excluded Indigenous students, we must make efforts to mitigate the unique barriers they face. As their knowledge systems have been historically excluded and erased in Western science, we begin by reviewing the literature on the inclusion of Traditional Ecological Knowledge (TEK) in biology education and describe best practices. Next, to better understand how Native Hawaiian and other Pacific Islander (NHPI) students integrate into the scientific community, we used Social Influence Theory as a framework to measure NHPI student science identity, self-efficacy, alignment with science values, and belonging. We also investigated how students …

Evaluating The Relationship Between Methane Seeps And Seafloor Geomorphology On The Northern Us Atlantic Margin, Gabriel Hernandez

Theses and Dissertations

Methane seeps are a transport pathway for carbon from seafloor sediments to the marine environment with important implications for global biogeochemical cycling. Accordingly, there is substantial interest in better understanding the processes that control seep location and predicting the distribution of seeps with existing seafloor datasets. Visual evaluation of methane seeps, in multibeam sonar water column data, suggests a spatial relationship between seeps and specific seafloor morphologic features such as ridge crests. In this thesis, seafloor geomorphology at 1996 seep detection sites on the US Atlantic margin was quantitatively characterized by geomorphologic phonotype, bathymetric position index, slope, rugosity, and aspect …

Applications Of Urban Land Evaluation And Site Assessment (Ulesa) In Chesterfield County, Virginia, Emily Hastings

Theses and Dissertations

Urban and suburban agriculture is increasing in popularity across the United States. However, many of these farms are short-lived due to a combination of human factors (e.g., managerial, economic, cultural) and environmental or spatial factors (e.g., zoning, soil quality, distance to markets). Geospatial analysis, in the form of suitability modeling, could aid in locating suitable sites for these activities. Land Evaluation and Site Assessment (LESA) is a suitability modeling technique that generates a score for agricultural land use in traditionally rural spaces. This research explores adapting this method to encompass the complexities of placing diverse, in-ground agriculture in urban and …

Spatial And Age Disparities In Covid-19 Outcomes, Qian Huang

Theses and Dissertations

COVID-19 has caused significant social, economic, environmental, and political impacts globally and affected communities unequally in the U.S. The pandemic has also sparked interest in age-specific manifestations of infection, for example, studies confirmed the risk of increasing age with COVID-19 severity. However, the nonstationarity effects of health determinants among age groups have not been well examined. This study aims to explore the nonstationarity effects of social, behavioral, environmental, health care access, and political contexts on COVID-19 outcomes. This study poses three broad questions: 1) how did COVID-19 vaccinations align with COVID-19 daily cases and deaths in the United States; 2) …

Quantifying Human Mobility Patterns During Disruptive Events With Geospatial Big Data, Yuqin Jiang

Theses and Dissertations

Understanding human mobility patterns is an essence for geography and geographical information science. Although existing studies have found that human mobility patterns are highly predictable, such patterns can be disrupted by events, ranging from sports games to natural hazard caused evacuations. However, traditional data collection methods that heavily rely on self-reported travel behaviors are often delayed and at a small scale, and thus are often not sufficient to reveal the disrupted human mobility patterns. Fortunately, with the development of geolocating-related technologies, multiple platforms are able to capture human mobility data in unprecedented spatiotemporal scales and granularities. These data, such as …

Using Geospatial Analysis To Evaluate Relationships Between Cancer Incidence And Social Factors In Brooklyn, Ny, Sheena Philogene

Theses and Dissertations

This study explored the spatial distribution of cancer incidence in Brooklyn, NY. Using publicly available data, the relationships between cancer incidence and factors linked to cancer were investigated. Furthermore, the study explored the value of using large amounts of data with GIS techniques to quickly analyze geographic trends for cancer.

A Remote Sensing Driven Geospatial Approach To Regional Crop Growth And Yield Modeling, Sadia Alam Shammi

Theses and Dissertations

Agriculture and food security are interlinked. New technologies and instruments are making the agricultural system easy to operate and increasing the food production. Remote sensing technology is widely used as a non-destructive method for crop growth monitoring, climate analysis, and forecasting crop yield. The objectives of this study are to (1) monitor crop growth remotely, (2) identify climate impacts on crop yield, and (3) forecasting crop yield. This study proposed methods to improve crop growth monitoring and yield predictions by using remote sensing technology. In this study, we developed crop vegetative growth metrics (VGM) from the MODIS (Moderate Resolution Imaging …

Assessment Of Great Basin Bristlecone Pine (Pinus Longaevaâ D.K. Bailey) Forest Communities Using Geospatial Technologies, David Richard Burchfield

Theses and Dissertations

Great Basin bristlecone pine (Pinus longaeva D.K. Bailey) is a keystone species of the subalpine forest in the Great Basin and western Colorado Plateau ecoregions in Utah, Nevada, and California. Bristlecone pine is also the world's longest-lived non-clonal organism, with individuals occasionally reaching ages up to 5,000 years old. Because of its longevity, bristlecone pine contains an important proxy record of climate data in its growth rings. Despite its ecological and scientific importance, bristlecone pine's distribution and associated environmental drivers are poorly understood. Geospatial technologies, including unmanned aircraft systems (UAS), remote sensing, geographic information systems (GIS), and spatial modeling techniques …

Digital Earth: The Impact Of Geographic Technology Through The Ages, Mishka Vance Huq

Theses and Dissertations

Geographic technology encompasses a wide range of geographic knowledge, concepts, processes, and artifacts. Because of its interdisciplinarity and integration with other technologies, the paper examines the diffuse impacts of geographic technology within the evolving relationship between technological and societal developments over time.

Isolating Locations Of Potential Episodes Of Cave Collapse And Their Relationship To Cave Level Development Through Major River System Incisions, Ethan William Conley

Theses and Dissertations

Karst landscapes, in which dissolution of bedrock is the dominant geomorphic process, make up 10%-20% of Earth’s land surfaces and supply between 20%-25% of the global population with drinking water. Dissolution dominates the genesis of karst systems, creating flow pathways, conduits, and caves. Cave patterns from dissolution can be influenced by regional factors, such as water table base-level fluctuations correlating to major river system incisions. During periods of negligible regional incisions, multiple cave levels may form. Despite the significant role dissolution plays in karstic genesis, physical erosional processes can enhance the formation of these karst systems and should not be …

Evaluating The Unequal Impacts Of Hurricane Harvey: A Critical Gis Analysis In Systems Of Governmental Risk Assessment And Mitigation, Mustafa Ansari Monk

Theses and Dissertations

This thesis uses flooding driven by Hurricane Harvey in 2017 and a history of inundation in Houston, Texas to critique the systems of floodplain mapping through the National Flood Insurance Program (NFIP). The role of Geographic Information Systems becomes a subject of interest in the context of U.S governance and the role of property as a driving force in urban development. The shortcomings of existing systems of mitigation are examined through mappings that bring measures of risk, damage, and recovery into contrast with each other. Racial and economic inequality are integrated into the analysis through a deeper consideration of the …

“Penniless And Unknown”: Temporality Of The Milwaukee County Poor Farm Cemetery - A Gis Analysis, Eric Eugene Burant

Theses and Dissertations

This thesis uses GIS modeling techniques of spatial data, archaeological data, and historical documentation to determine patterning of material culture associated with interments at the Milwaukee County Poor Farm Cemetery (MCPFC), an unmarked cemetery located in Wauwatosa, Wisconsin. Archaeological excavations at the MCPFC in 1991-1992 and again in 2013 recovered over 2,400 individuals associated with Milwaukee County’s practice of providing burial for institutional residents, unidentified or unclaimed individuals sent from the Coroner’s Office, the remains of cadaverized individuals, and community poor from 1862 through 1925 (Richards 2016).

Previous research identified two distinct material culture classes; grave goods and grave inclusions. …

A Gis-Based Risk Assessment For Fire Departments: Case Study Of Richland County, Sc, Tracy Whelen

Theses and Dissertations

Risk assessments enable fire departments to be better prepared for future incidents and to engage in more effective prevention activities. A combination of physical, demographic, and behavioral risk factors combined form a community’s level of risk. This research shows how spatial and nonspatial statistical methods can be used within a GIS framework to create such a risk assessment, with the Columbia-Richland Fire Department in Richland County, SC being used as a case study. Hot spot analysis and thematic mapping of incident rates were used to assess the first research question – what is the spatial variability of structure fires, carbon …

Improving Hydroshare And Web Application Interoperability Through Integrated Gis And His Data Services, Kenneth Jack Lippold

Theses and Dissertations

HydroShare is a collaborative online system being developed by the Consortium of Universities for the Advancement of Hydrologic Science Inc. (CUAHSI) with the goal of facilitating the dissemination, visualization, and publishing of hydrologic data and models. External web applications serve a key role in extending HydroShare's capabilities, so robust application programming interfaces (APIs) are a vital component of HydroShare's architecture. Hydrologic data stored on HydroShare are defined by a data type, and much of these data are either geospatial or time series data. Although HydroShare's API provides ways to upload and download files, as well as access certain metadata, it …

Of Fire, Mammals, And Rain: Mechanisms Of Plant Invasions, Tara Boyce Bishop

Theses and Dissertations

Biological invasions are driving environmental state changes on a global scale. Exotic plant species must be successful at passing several abiotic and biotic filters to establish and disrupt the native plant community assembly. Understanding where exotic plants are on a regional scale and being able to characterize how exotic plants are generally interacting with their environment is crucial information for exotic species management (chapter 1). In the western United States human-related activities are augmenting the spread of exotic plant species by increasing the ignitions of wildfire. Wildfire can lead to nutrient pulses through the removal of intact native communities and …

A Gis Approach To Archaeological Settlement Patterns And Predictive Modeling In Chihuahua, Mexico, Haylie Anne Ferguson

Theses and Dissertations

In this study I analyzed the pattern of settlement for known Medio period (A.D. 1200–1450) sites in the Casas Grandes region of Chihuahua, Mexico. Locational data acquired from survey projects in the Casas Grandes region were evaluated within a Geographic Information Systems (GIS) framework to reveal patterns in settlement and site distribution. Environmental and cultural variables, including aspect, cost distance to nearest ballcourt, ecoregion, elevation, local relief, cost distance to nearest oven, cost distance to Paquimé, slope, soil, terrain texture, topographic position index, cost distance to nearest trincheras, vegetation, vegetation variety to 100 meters, vegetation variety to 500 meters, cost …

Urban Landscape Assessment Of The Mississippi And Alabama Gulf Coast Using Landsat Imagery 1973-2015, Abdalla R. Sherif

Theses and Dissertations

This study aims to conduct an assessment of the land cover change of the Mississippi and Alabama coastal region, an integral part of the Gulf Coast ecological makeup. Landsat satellite data were used to perform a supervised classification using the imagery captured by Landsat sensors including Landsat 1-2 Multispectral Scanner (MSS), Landsat 4-5 Thematic Mapper (TM), Landsat 7 Enhanced Thematic Mapper (ETM+), and Landsat 8 Operational Land Imager (OLI) from 1973 to 2015. The objective of this study is to build a long-term assessment of urban development and land cover change over the past four decades for the Alabama and …

Settlement Patterns In Albania From The Iron Age Through Greek Colonization And Roman Integration (1100 Bc - Ad 395), Erina Baci

Theses and Dissertations

The Illyrians were an Indo-European group of people who once inhabited a large expanse of the western Balkans. As interactions with the Greeks and, later, the Romans increased, the traditional way of life and sociopolitical organization of the Illyrians were undoubtedly altered. This thesis takes a geospatial approach in order to address how interactions with other groups of people influenced Illyrian settlement patterns. Specifically, how Greek colonization followed by Roman incorporation affected Illyrian settlement patterns in Albania? Due to its peripheral location in the Mediterranean, Albania provides a unique case study for investigating colonization, integration, and interaction between different cultures.

Modeling Coastal Vulnerability For Insight Into Mangrove And Coral Reef Conservation Efforts In Cuba, Maria Gomez

Theses and Dissertations

Cuba’s expansive coral reefs and mangrove habitats provide a variety of ecosystem services to coastal communities including nursery grounds for fisheries, shoreline stability, and storm and flood protection. While Cuba’s coastal habitats are some of the most preserved in the Caribbean, they are under increasing threat of degradation from the impacts of climate change, increased tourism, and coastal development. With the goal of sustainable development, Cubans need to assess the storm and flood protection benefits these coastal habitats provide, and integrate this information into future expansion and management plans within the National Protected Areas System (SNAP). Using the open source …

Assessment Of The Socio-Environmental Impacts Of The Urban Expansion Using Gis And Remote Sensing In The City Of Guayaquil, Ecuador., Erika P. Jimenez Rivera

Theses and Dissertations

This thesis investigates the impacts of the urban expansion from 1990 to 2010 in Guayaquil, Ecuador using geospatial technologies. It incorporates census and land cover data to identify the social and environmental repercussions through Hot Spot Analysis, land cover classification, and Markov chains model.

The Positive Developments And Applications Of Geospatial Technologies In Archaeology On Fort Benning, Georgia, Jane Mader

Theses and Dissertations

This thesis explores the advantages of using geospatial technologies in the field of archaeology. The purpose of this study, conducted on Site 9CE16 on Fort Benning, Georgia, was to examine the ways in which Geographic Information Systems (GIS) can be used to more accurately depict artifacts and features present on archaeological sites. With the research I gathered, I constructed an updated site map which can be viewed in Figures 1.1, 1.2, and 1.3. The map produced includes more features than were initially mapped at Site 9CE16 and help paint a clearer picture of the structures which existed at the original …

Military Application Of Aerial Photogrammetry Mapping Assisted By Small Unmanned Air Vehicles, Kijun Lee

Theses and Dissertations

This research investigated the practical military applications of the photogrammetric methods using remote sensing assisted by small unmanned aerial vehicles (SUAVs). The research explored the feasibility of UAV aerial mapping in terms of the specific military purposes, focusing on the geolocational and measurement accuracy of the digital models, and image processing time. The research method involved experimental flight tests using low-cost Commercial off-the-shelf (COTS) components, sensors and image processing tools to study key features of the method required in military like location accuracy, time estimation, and measurement capability. Based on the results of the data analysis, two military applications are …

A Reconciled Estimation Of The State Of Cryospheric Components In The Southern Andes And California Using Geospatial Techniques, Pushkar Inamdar

Theses and Dissertations

Glaciers are the essential source of fresh water not only to human sustenance, but it is also vital for all lifeforms on earth. Glaciers are also key components in understanding rapid changes in climate. This makes understanding of glacier mass, extent, and overall state essential. In this dissertation, the objective was to analyze the state of snow and ice masses in the mid (California) and low latitude (Chile/Argentina) western American regions using geospatial technology. This study also analyzed the effects of anomalies in snow mass on the regional agricultural practices in California’s Central Valley. In the Southern Andes, the digital …

Assessing Phosphorus Sources With A Gis-Based Phosphorus Risk Index In A Mixed-Use, Montane Watershed, Josiah A. Johns

Theses and Dissertations

Elevated phosphorus (P) loading of freshwater lakes and reservoirs often results in poor water quality and negative ecological effects. Critical source areas (CSA) of P in the watershed can be difficult to identify and control. A useful concept for identification of a CSA is the P risk index (P Index) that evaluates the P risk associated with distinct source and transport pathways. The objectives of this study were to create a GIS model that adapts the Minnesota (MN) P Index for use at the watershed scale in a mixed-use, mountain environment, and to evaluate its effectiveness relative to field-based assessment. …

Application Of Coastal And Marine Ecological Classification Standard (Cmecs) To Remotely Operated Vehicle (Rov) Video Data For Enhanced Geospatial Analysis Of Deep Sea Environments, Caitlin A. Ruby

Theses and Dissertations

The Coastal and Marine Ecological Classification Standard (CMECS) provides a comprehensive framework of common terminology for organizing physical, chemical, biological, and geological information about marine ecosystems. Federally endorsed as a dynamic content standard, all federally funded data must be compliant by 2018; however, applying CMECS to deep sea datasets and underwater video have not been extensively examined. The presented research demonstrates the extent to which CMECS can be applied to deep sea benthic habitats, assesses the feasibility of applying CMECS to remotely operated vehicle (ROV) video data in near-real-time, and establishes best practices for mapping environmental aspects and observed deep …

Gis-Based Evaluation Of Landslide Susceptibility For Eastern Tennessee, Sara Ann Smith

Theses and Dissertations

The Appalachian Mountains in eastern Tennessee are known for landslides, and landslides are reported to cause millions of dollars of damage. To aid in the estimation of future susceptibility, geographic information systems was used to perform a logistic regression, to identify landslides in eastern Tennessee. Landslide model results validated using Kold cross validation. The model results suggest that the environmental variables slope, soil, landcover/vegetation, and distance to roads were significant factors related to landslide susceptibility. The susceptibility map showed that 86.8% of urban areas in eastern Tennessee were at highest susceptibility for landslides, possibly due to lower amounts of landcover. …

Hill-Fort Sites And Tumuli In The Shkodra Plain Region Of Northern Albania: A Geospatial Perspective, Dora Jane Lambert

Theses and Dissertations

The objective of this research was to determine the environmental and social factors that led to the shift of settlement patterning from agro-pastoral in the late Neolithic to hillort sites at the turn of the Early Bronze Age and why burial mounds (tumuli) were erected further than anticipated from corresponding hillort sites in the Shkodra Plain region in Northern Albania. Geospatial techniques were used to examine 168 tumuli and seven hillort sites. These were mapped to examine visibility, viewshed, slope, and potential prehistoric networks. Based on the landscape visibility GIS results, it was found that hillort sites and tumuli were …

An Examination Of The Hydrological Environment In Choctaw County Mississippi Since 1995, With A Focus On An Area Surrounding An Industrial Complex Established In 1998, Jeremy Keith Foote

Theses and Dissertations

The population and industrial complexes of Choctaw County obtains much of its water from an aquifer system in the Tertiary age Wilcox unit of the Mississippi Embayment. Utilizing 20 years of physical chemistry (P-Chem) analysis, potentiometric groundwater records of Choctaw County public water wells as well as industrial P-Chem analysis and surface and ground water level records from an industrial complex, this study examined the changes to the hydrosphere that has taken place since 1995. Analysis of the hydrosphere shows that over the last 20 years, there has been a drop in the potentiometric surface of the Wilcox aquifer system. …

Valuing Natural Space And Landscape Fragmentation In Richmond, Va, Lee Wyatt Carpenter

Theses and Dissertations

Hedonic pricing methods and GIS (Geographic Information Systems) were used to evaluate relationships between sale price of single family homes and landscape fragmentation and natural land cover. Spatial regression analyses found that sale prices increase as landscapes become less fragmented and the amount of natural land cover around a home increases. The projected growth in population and employment in the Richmond, Virginia region and subsequent increases in land development and landscape fragmentation presents a challenge to sustaining intact healthy ecosystems in the Richmond region. Spatial regression analyses helped illuminate how land cover patterns influence sale prices and landscape patterns that …