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.
Results
Showing 1 to 20 of 25 for “"vegetation classification"”.
-
A Combined Method for Vegetation Classification Based on Visible Bands from UAV Images: A Case Study for Invasive Wild Parsnip Plants
… wild parsnip cannot be distinguished from other vegetation due to low spatial resolution of the imagery. Unmanned Aerial Vehicles (UAV) can obtain ultra-high resolution (UHR) imagery and have been used for vegetation-related monitoring in both environmental and agricultural applications in recent …
-
Reconstructing NDVI Time Series from Landsat and MODIS and Developing a Species-Specific Validation Dataset for Vegetation Classification in Frontenac Provincial Park
Understanding the timing of vegetation green-up and species composition in forests is critical for monitoring ecosystem dynamics and assessing how forests are shifting under climate change. This thesis investigates spring start of season (SOS) using remote sensing and develops a field-based species …
-
Vegetation, diversity and rarity on the Cape Peninsula, South Africa
… a diversity of habitats supporting a mosaic of vegetation types. This study attempts to describe and explain some of the determinants of species pattern and distribution. The first part of this thesis compares a simple vegetation classification, derived from visual examination of dominant …
-
Vegetation gradients in Southern Cape mountains
… This study arose from the need to define local vegetation patterns and their interdependence with animal life, climate and soil as a necessary prerequisite to vegetation mapping and Fynbos is part of the diverse and complex Cape Floral Kingdom. Field taxonomy in fynbos is often problematic for …
-
A contextual classification approach for forest land cover mapping using high spatial resolution multispectral satellite imagery – a case study in Lake Tahoe, California
… sensing. Conventional methods of pixel-based classification label each pixel independently by considering only a pixel’s spectral properties. While these purely spectral-based techniques may be applicable to many medium and coarse-scale remote sensing analyses, they may become less accurate …
-
Time Series Analysis of Vegetation Change using Hyperspectral and Multispectral Data
… 2007 and QuickBird from 2006 and 2009) to create vegetation classification maps using both library spectra and regions of interest. Two sets of classification maps were produced using Mixture-Tuned Matched Filtering. The results were assessed visually and mathematically. Through visual inspection …
-
Improved hyperspectral classification of vegetation through generative deep learning models.
… the potential for taxonomic discrimination and classification, though this came with the caveat that misidentification was a frequent impediment as a result of small sample sizes, inter-class similarity and intra-class variability. The aim of this thesis was to develop methods of improving the …
-
Monitoring Squirrels from the Sky: Applications of Uncrewed Aerial Systems-Based Bioacoustic and Vegetation Monitoring Regimes for Mohave Ground Squirrel
… live and camera trapping. Chapter two captured vegetation information within MGS ranges using UAS-based multiband imagery and developed a random forest vegetation classification model for the study area, allowing for a better understanding of the vegetation that is most common within MGS ranges. …
-
Predicting forest cover types in Southwestern Virginia using topographic information
… types, using the Trayis (1982) and SAF (1980) vegetation classification systems, were produced for the entire study area. Accuracy levels of 57 to 78 percent were obtained. There were no significant differences in classification accuracy between Trayis and SAF forest type predictions (P > …
-
Monitoring changes in plant community composition and landscape structure as a result of prescribed burning at Big Oaks National Wildlife Refuge
A vegetation monitoring program was initiated at Big Oaks National Wildlife Refuge (Big Oaks NWR) to help understand the effects of fire management on critical wildlife habitat. The objectives of this study were to produce a baseline description of plant community structure and composition and to …
-
Eastern Deciduous Forest Phenology and Vegetative Vigor Trends From 2000 to 2013, Mammoth Cave National Park, KY
… central Kentucky. Using a Normalized Difference Vegetation Index (NDVI) calculated from MODerate-Resolution Imaging Spectroradiometer (MODIS) instrument data, the photosynthetic activity of vegetation at Mammoth Cave National Park (MACA) is tracked from 2000 to 2013. Three methods were employed …
-
Parc Penallta Phase 1 Habitat Survey and Implications for Management
… into account species abundance – and a National Vegetation Classification survey, along with further GIS analysis, be carried out in order to support and increase the accuracy of the Phase 1 habitat map produced for this project.
-
Integrating Digital Aerial Photography and Lidar-Derived Information For Object-Based Coastal Tidal Marsh Classification Using Tree-Based Ensemble Algorithms
… Detection And Ranging) data for intertidal vegetation classification in the upper May River watershed near Bluffton, South Carolina. An object-based image analysis (OBIA) approach was adopted for mapping the following detailed tidal marsh classes: tall creekbank spartina alterniflora, …
-
A wetland vulnerability assessment : consequences for the avian communities of saltmarshes
… objectives: to classify saltmarsh and reed bed vegetation distribution; to assess the vulnerability of these habitats to sea level rise; to determine the impacts of sea level rise on nesting avifauna; and to derive recommendations for conservation practice.Vegetation classification methods using …
-
Diversity patterns and conservation priorities in the "Mountains of Central Asia" biodiversity hotspot
… use and climate change as the main drivers of vegetation change, while highlighting the strong influence of orographic heterogeneity. The review also revealed that Kyrgyzstan’s croplands remain poorly studied, despite increasing evidence that they may serve as secondary habitats for rare plant …
-
Botanical processes in urban derelict spaces
… in the West Midlands. Experimental work included vegetation surveys, soil seed bank investigation, field mapping and seed rain trapping methods. Interpretation of the data involved a range of approaches including vegetation classification and ordination, comparative analysis of plant functional …
-
The vegetation of Paulshoek, Namaqualand : phytosociology and landuse impacts
… the underlying mechanisms that influence vegetation composition and distribution in this biome. A detailed summary of the main phytosociological studies completed in the succulent karoo biome is included. This includes Adamson's classic 1938 description of the vegetation of the Kamiesberg. …
-
Classifying and Mapping Native Grasslands of South Dakota's Northern Prairie Coteau and Characterizing Habitat for Dakota Skipper Conservation
… plan for the butterfly in South Dakota, accurate vegetation classification, mapping, and characterization are critical. The objectives of this study were to 1) rank prairie condition, 2) classify and map upland prairie, 3) characterize and compare vegetation at Dakota skipper inhabited and …
-
Remote Sensing Applications to Support Sustainable Natural Resource Management
… It was intended to produce one single, dynamic, classification and mapping system for existing vegetation that could rely on commonly available inventory and remote sensing data. This classification and mapping system was intended to provide the analytical basis for resource planning and …
-
Remote Sensing Applications to Support Sustainable Natural Resource Management
… It was intended to produce one single, dynamic, classification and mapping system for existing vegetation that could rely on commonly available inventory and remote sensing data. This classification and mapping system was intended to provide the analytical basis for resource planning and …
Page 1 of 2