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 139 for “"aerial photographs"”.
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Quantitative Differentiation of Soil Association Areas Using Aerial Photographs
Made available in DSpace on 2014-12-10T22:21:31Z (GMT). No. of bitstreams: 1 7114907.pdf: 5639052 bytes, checksum: 4864e1ea2ade1e4f72c5902be6ba1096 (MD5) Previous issue date: 1970
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Computer-aided recognition of man-made structures in aerial photographs
Aerial image acquisition systems are producing more data than can be analyzed by human experts. Most of the images produced by remote sensing satellites, including military ones, never get seen or inspected. In this work, automated detection and recognition of buildings in aerial photos is …
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Use of prior distributions from aerial photographs in forest inventory
… pine. hardwood. and mixed wood stands) using aerial photo volume tables as the prior information source. Aerial photographs provided a reliable source of information even though most photographs were nearly five years old. For a given level of precision within a particular stand, Bayesian …
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Building Detection Using a Hybrid Methodology Applied to High Spatial Resolution Aerial Photographs
… high-spatial resolution satellite and digital aerial photography is an important aspect of geographic information science research. Accurate methodologies can provide scientists with the building information that can be broadly applied in various applications, including land cover change …
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Vegetation cover change on Tindfjöll mountains, Iceland, assessed by aerial photographs, topography, and climate
Climate change is having a great impact on the fragile High Latitude environment where warming is occurring at a rate at least double the global average. It is urgent to understand the relationship between climate and vegetation cover, which is playing an important role, as a carbon sink, for …
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A study of bush encroachment in Hluhluwe National Park, using aerial photographs within a GIS framework
… areas to encroachment in that section. Aerial photographs from 1960 were linked together and aligned to an orthorectified Image from 2000, which had been georeferenced and aligned to the GIS database that exists for the area. Areas of closed canopy vegetation were converted into …
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An assessment of archive stereo-aerial photographs for 3-dimensional reconstruction of damaged and destroyed archaeological earthworks
… to regain earthwork metrics from archive stereo-aerial photographs (SAPs) using digital photogrammetry to create digital surface models (DSMs) of archaeological sites within the UK dating from the 1940s to 2010. A literature search confirmed the utility of SAPs for reconstructing geomorphological …
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Towards automatic modeling of buildings in informal settlements from aerial photographs using deformable active contour models (snakes)
… of buildings in informal settlement areas from aerial photographs. The building extraction strategy is developed and implememed with the aim of generatinga a desk top Informal Settlement Geographic lnformation System (ISGIS) using felf developed and available PC-based GIS tools to serve novice …
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Aerial photography and environmental impact analysis : the potential contribution of comparative interpretation of multi-temporal aerial photographs to Environmental Impact Analysis
… comparative interpretation of multi-temporal aerial photographs can be used as a tool in Environmental Impact Analysis (EIA). To test this hypothesis a site, Silwerstroomstrand, approximately 40 kilometres north of Cape Town on the West coast was chosen. An analysis of the site was carried out …
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Evaluating Satellite Image Classification For Bottomland Surveys in Ozark National Scenic Riverways
The National Park Service has used aerial photographs in a preliminary survey of landcover in Ozark National Scenic Riverways. This thesis evaluated the feasibility of using satellite images in further surveys of the park. Aerial photographs were digitized to allow computerized comparison with …
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Development of a Predictive Habitat Evaluation Model for Gaillardia Aestivalis (Walt.) Rock. Var. Winkleri (Cory) Turner Using GPS, Remote Sensing and GIS Techniques
… TX. Field investigations along with CIR positive aerial photographs were used to study local distribution and ecological requirements (soil, site, plant associations) of the plant. Data were obtained from paper maps, aerial photographs and a Landsat TM image. Sites occupied by G. aestivalis var. …
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Air photo interpretation for the measurement of changes in urban land use
This research is concerned with the use of aerial photographs for the measurement and recording of urban land use. A suitable land use classification scheme and a methodology for the measurement and recording of land use areas are developed. Use is made of these to obtain data for geographical …
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Positional accuracy in a natural resource database: comparison of a single-photo resection versus affine registration
… for digitized data taken from 1:20,000 scale aerial photographs and United States Geological Survey (USGS) 1:24,000 scale topographic maps. Positional accuracy was determined as the Euclidian distance between the digitized coordinate and the reference ground coordinate collected with global …
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The applications of aerial photography, photogrammetry and photo-interpretation in the planning process
To date aerial photography and associated photogrammetric and photo-interpretation techniques have played but a limited role in the planning process. In this study their dual role (i) as a base medium and (ii) as a source of data is investigated bearing in mind the requirements of planning data and …
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Evaluation of photographic properties for area estimation
From the known image positional errors on aerial photographs, this thesis computes and evaluates acreage estimation errors. Four hypothetical tracts were used in simulating aerial photographs with 104 different camera orientation combinations. Flying heights of 4000 and 6000 feet, focal lengths of …
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Detection of potential arable land with remote sensing and GIS. A Case Study for Kjósarhreppur
… from the Agricultural University of Iceland, aerial photographs, contour lines, lakes and rivers, roads from the municipality Kjósarhreppur and finally aerial photos, contour lines and elevation points from Samsýn (IT company, specialized in GIS). The project was divided into two parts. …
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Climatic and hydrologic processes leading to recent wetland losses in Yellowstone National Park, USA
… wetland area I mapped hydric soils, analyzed aerial photographs, and identified geomorphic indicators of higher water. Vegetation was sampled to characterize wetlands and plant-water relationships, and I also conducted a soil seed bank study. The Trumpeter Lake focal site revealed groundwater …
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Assessing glacier retreat and landform production at the ‘debris-charged’ snout of Kvíárjökull, Iceland
… to its diverse glacial legacy and its archive of aerial photographs that provide accurately dated records of glacier retreat and landform evolution from 1945. This study focuses on Kvíárjökull, an outlet glacier of the Öræfajökull ice cap in southeast Iceland, recently classified as a …
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Landscape organization in Magna Graecia
… and Herakleia, documented respectively by aerial photographs and inscriptions, has directed most scholarly interest to their geometric properties, rather than to their functions and significance. In their attempts to explain the often puzzling intervals and orientations of the linear …
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