Dissertations / Theses on the topic 'Aerial photography in earth sciences'
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Smith, Scott R. "Aerial perspective and geography : an historical look at the use of aircraft to gain a sense of place /." Abstract Full Text (HTML) Full Text (PDF), 2009. http://eprints.ccsu.edu/archive/00000575/02/2016FT.htm.
Full textThesis advisor: Cynthis Pope. "... in partial fulfillment of the requirements for the degree of Master of Science in Geography." Includes bibliographical references (leaves 77-81). Also available via the World Wide Web.
Musa, Khalid Bin. "Identifying Land Use Changes and It's Socio-Economic Impacts : A Case Study of Chacoria Sundarban in Bangladesh." Thesis, Linköping : Linköping University. Department of Computer and Information Science, 2008. http://www.diva-portal.org/smash/get/diva2:2076/FULLTEXT03.
Full textYameogo, Dieudonné. "Hydrogéologie des formations fissurées de la partie sud du plateau Mossi entre le Nazino et le Nakambe (région de Kombissiri-Manga), Burkina-Faso." Phd thesis, Grenoble 1, 1988. http://tel.archives-ouvertes.fr/tel-00756428.
Full textDehm, Dustin. "A Small Unmanned Aerial System (sUAS) Based Method for Monitoring Wetland Inundation & Vegetation." University of Toledo / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1556713788128588.
Full textBowie, Markus. "The Longest Journey." Thesis, Kungl. Konsthögskolan, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kkh:diva-255.
Full textThe essay was published as part of a Master of Fine Art Degree exhibition with the same title. For an English translation of it and photographic documentation of the exhibition, please contact: markus.bowie@gmail.com
Cooper, Joseph L. "Supporting Flight Control for UAV-Assisted Wilderness Search and Rescue Through Human Centered Interface Design." Diss., CLICK HERE for online access, 2007. http://contentdm.lib.byu.edu/ETD/image/etd2140.pdf.
Full textMadsen, Matthew D. "Influence of Soil Water Repellency on Post-fire Revegetation Success and Management Techniques to Improve Establishment of Desired Species." BYU ScholarsArchive, 2009. https://scholarsarchive.byu.edu/etd/1994.
Full textDasnias, Philippe. "Successions végétales : synthèse bibliographique et dynamisme à l'ubac montagnard de la Moyenne Tarentaise (Savoie)." Grenoble 1, 1987. http://www.theses.fr/1987GRE10047.
Full textCarleer, Alexandre. "Region-based classification potential for land-cover classification with very high spatial resolution satellite data." Doctoral thesis, Universite Libre de Bruxelles, 2006. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210852.
Full textSince 1999, Very High spatial Resolution satellite data (Ikonos-2, QuickBird and OrbView-3) represent the surface of the Earth with more detail. However, information extraction by multispectral pixel-based classification proves to have become more complex owing to the internal variability increase in the land-cover units and to the weakness of spectral resolution.
Therefore, one possibility is to consider the internal spectral variability of land-cover classes as a valuable source of spatial information that can be used as an additional clue in characterizing and identifying land cover. Moreover, the spatial resolution gap that existed between satellite images and aerial photographs has strongly decreased, and the features used in visual interpretation transposed to digital analysis (texture, morphology and context) can be used as additional information on top of spectral features for the land cover classification.
The difficulty of this approach is often to transpose the visual features to digital analysis.
To overcome this problem region-based classification could be used. Segmentation, before classification, produces regions that are more homogeneous in themselves than with nearby regions and represent discrete objects or areas in the image. Each region becomes then a unit analysis, which makes it possible to avoid much of the structural clutter and allows to measure and use a number of features on top of spectral features. These features can be the surface, the perimeter, the compactness, the degree and kind of texture. Segmentation is one of the only methods which ensures to measure the morphological features (surface, perimeter.) and the textural features on non-arbitrary neighbourhood. In the pixel-based methods, texture is calculated with mobile windows that smooth the boundaries between discrete land cover regions and create between-class texture. This between-class texture could cause an edge-effect in the classification.
In this context, our research focuses on the potential of land cover region-based classification of VHR satellite data through the study of the object extraction capacity of segmentation processes, and through the study of the relevance of region features for classifying the land-cover classes in different kinds of Belgian landscapes; always keeping in mind the parallel with the visual interpretation which remains the reference.
Firstly, the results of the assessment of four segmentation algorithms belonging to the two main segmentation categories (contour- and region-based segmentation methods) show that the contour detection methods are sensitive to local variability, which is precisely the problem that we want to overcome. Then, a pre-processing like a filter may be used, at the risk of losing a part of the information. The “region-growing” segmentation that uses the local variability in the segmentation process appears to be the best compromise for the segmentation of different kinds of landscape.
Secondly, the features calculated thanks to segmentation seem to be relevant to identify some land-cover classes in urban/sub-urban and rural areas. These relevant features are of the same type as the features selected visually, which shows that the region-based classification gets close to the visual interpretation.
The research shows the real usefulness of region-based classification in order to classify the land cover with VHR satellite data. Even in some cases where the features calculated thanks to the segmentation prove to be useless, the region-based classification has other advantages. Working with regions instead of pixels allows to avoid the salt-and-pepper effect and makes the GIS integration easier.
The research also highlights some problems that are independent from the region-based classification and are recursive in VHR satellite data, like shadows and the spatial resolution weakness for identifying some land-cover classes.
Résumé
Depuis 1999, les données satellitaires à très haute résolution spatiale (IKONOS-2, QuickBird and OrbView-3) représentent la surface de la terre avec plus de détail. Cependant, l’extraction d’information par une classification multispectrale par pixel devient plus complexe en raison de l’augmentation de la variabilité spectrale dans les unités d’occupation du sol et du manque de résolution spectrale de ces données. Cependant, une possibilité est de considérer cette variabilité spectrale comme une information spatiale utile pouvant être utilisée comme une information complémentaire dans la caractérisation de l’occupation du sol. De plus, de part la diminution de la différence de résolution spatiale qui existait entre les photographies aériennes et les images satellitaires, les caractéristiques (attributs) utilisées en interprétation visuelle transposées à l’analyse digitale (texture, morphologie and contexte) peuvent être utilisées comme information complémentaire en plus de l’information spectrale pour la classification de l’occupation du sol.
La difficulté de cette approche est la transposition des caractéristiques visuelles à l’analyse digitale. Pour résoudre ce problème la classification par région pourrait être utilisée. La segmentation, avant la classification, produit des régions qui sont plus homogène en elles-mêmes qu’avec les régions voisines et qui représentent des objets ou des aires dans l’image. Chaque région devient alors une unité d’analyse qui permet l’élimination de l’effet « poivre et sel » et permet de mesurer et d’utiliser de nombreuses caractéristiques en plus des caractéristiques spectrales. Ces caractéristiques peuvent être la surface, le périmètre, la compacité, la texture. La segmentation est une des seules méthodes qui permet le calcul des caractéristiques morphologiques (surface, périmètre, …) et des caractéristiques texturales sur un voisinage non-arbitraire. Avec les méthodes de classification par pixel, la texture est calculée avec des fenêtres mobiles qui lissent les limites entre les régions d’occupation du sol et créent une texture interclasse. Cette texture interclasse peut alors causer un effet de bord dans le résultat de la classification.
Dans ce contexte, la recherche s’est focalisée sur l’étude du potentiel de la classification par région de l’occupation du sol avec des images satellitaires à très haute résolution spatiale. Ce potentiel a été étudié par l’intermédiaire de l’étude des capacités d’extraction d’objet de la segmentation et par l’intermédiaire de l’étude de la pertinence des caractéristiques des régions pour la classification de l’occupation du sol dans différents paysages belges tant urbains que ruraux.
Doctorat en sciences agronomiques et ingénierie biologique
info:eu-repo/semantics/nonPublished
BARKEY, ROLAND ALEXANDER. "Etudes des mangroves de l'indo-malaisie et application des techniques de la teledetection a sulawesi." Toulouse 3, 1987. http://www.theses.fr/1987TOU30228.
Full textFallourd, Renaud. "Suivi des glaciers alpins par combinaison d'informations hétérogènes : images SAR Haute Résolution et mesures terrain." Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00718596.
Full textBélanger, Jean. "Mise à jour de la Base de Données Topographiques du Québec à l'aide d'images à très haute résolution spatiale et du progiciel Sigma0 : le cas des voies de communication." Thèse, 2011. http://hdl.handle.net/1866/6319.
Full textIn order to optimize and reduce the cost of road map updating, the Ministry of Natural Resources and Wildlife is considering exploiting high definition color aerial photography within a global automatic detection process. In that regard, Montreal based SYNETIX Inc, teamed with the University of Montreal Remote Sensing Laboratory (UMRSL) in the development of an application indented for the automatic detection of road networks on complex radiometric high definition imagery. This application named SIGMA-ROUTES is a derived module of a software called SIGMA0 earlier developed by the UMRSL for optic and radar imagery of 5 to 10 meter resolution. SIGMA-ROUTES road detections relies on a map guided filtering process that enables the filter to be driven along previously known road vectors and tagged them as intact, suspect or lost depending on the filtering responses. As for the new segments updating, the process first implies a detection of potential starting points for new roads within the filtering corridor of previously known road to which they should be connected. In that respect, it is a very challenging task to emulate the human visual filtering process and further distinguish potential starting points of new roads on complex radiometric high definition imagery. In this research, we intend to evaluate the application’s efficiency in terms of total linear distances of detected roads as well as the spatial location of inconsistencies on a 2.8 km2 test site containing 40 km of various road categories in a semi-urban environment. As specific objectives, we first intend to establish the impact of different resolutions of the input imagery and secondly establish the potential gains of enhanced images (segmented and others) in a preemptive approach of better matching the image property with the detection parameters. These results have been compared to a ground truth reference obtained by a conventional visual detection process on the bases of total linear distances and spatial location of detection. The best results with the most efficient combination of resolution and pre-processing have shown a 78% intact detection in accordance to the ground truth reference when applied to a segmented resample image. The impact of image resolution is clearly noted as a change from 84 cm to 210 cm resolution altered the total detected distances of intact roads of around 15%. We also found many roads segments ignored by the process and without detection status although they were directly liked to intact neighbours. By revising the algorithm and optimizing the image pre-processing, we estimate a 90% intact detection performance can be reached. The new segment detection is non conclusive as it generates an uncontrolled networks of false detections throughout other entities in the images. Related to these false detections of new roads, we were able to identify numerous cases of new road detections parallel to previously assigned intact road segments. We conclude with a proposed procedure that involves enhanced images as input combined with human interventions at critical level in order to optimize the final product.
Gomes, João Filipe Airosa. "The use of digital aerial photography as support for restoration, management and habitat monitoring programmes." Dissertação, 2012. https://repositorio-aberto.up.pt/handle/10216/65007.
Full textGomes, João Filipe Airosa. "The use of digital aerial photography as support for restoration, management and habitat monitoring programmes." Master's thesis, 2012. https://repositorio-aberto.up.pt/handle/10216/65007.
Full text"Analysis of the Spatial Thinking of College Students in Traditional and Web-facilitated Introductory Geography Courses using Aerial Photography and Geo-visualization Technology." Doctoral diss., 2014. http://hdl.handle.net/2286/R.I.25817.
Full textDissertation/Thesis
Doctoral Dissertation Geography 2014
Paranjape, Meghana. "Identification of urban surface materials using high-resolution hyperspectral aerial imagery." Thèse, 2019. http://hdl.handle.net/1866/23760.
Full textKnowledge of surface cover materials is crucial for urban planning and management. With advances in remote sensing, especially in high spatial and spectral resolution imagery, the identification and detailed mapping of surface materials in urban areas based on spectral signatures are now feasible. Spectral signatures describe the interactions between ground objects and solar radiation and are assumed unique for each type of material. In this research, we use airborne CASI images with 1 m2 spatial resolution, with 96 contiguous bands in a spectral range between 367 nm and 1044 nm. These images covering the island of Montreal (Quebec, Canada), obtained in 2016, were analyzed to identify urban surface materials. The objectives of the project were first to find a correspondence between the physical and chemical characteristic of typical surface materials, present in the Montreal scenes, and the spectral signatures within the images. Second, to develop a sound methodology for identifying these surface materials in urban landscapes. To reach these objectives, our method of analysis is based on a comparison of pixel spectral signatures to those contained in a reference spectral library that describe typical surface covering materials (inert materials and vegetation). Two metrics were used in order to measure the correspondence of pixel spectral signatures and reference spectral signature. The first metric considers the shape of a spectral signature and the second the difference of reflectance values between the observed and reference spectral signature. A fuzzy classifier using these two metrics is then applied to recognize the type of material on a pixel basis. Typical spectral signatures were extracted from two spectral libraries (ASTER and HYPERCUBE). Spectral signatures of typical objects in Montreal measured on the ground (ASD spectroradiometer) were also used as reference spectra. Three general types of surface materials (asphalt, concrete, and vegetation) were used to ease the comparison between classifications using these spectral libraries. The classification using ASTER as a reference library had the highest success rate reaching 92%, followed by the field spectra at 88%, and finally with HYPERCUBE at 80%. There were no significant differences in the classification results indicating that the methodology works independently of the source of reference spectral signatures.
Khumalo, Bheki Romeo. "Goldmine tailings : a remote sensing survey." Thesis, 2004. http://hdl.handle.net/10539/23482.
Full textPollution originating from mine tailings is currently one of the environmental problems South Africa has to deal with. Because of the large number of tailings impoundments and their changing status, authorities are battling to keep their records and controls up to date. This project is aimed at investigating the use of remote sensing as a way of conducting surveys of mine tailings efficiently, regularly and at a low cost. Mine tailings impoundments of the Witwatersrand in Gauteng provide an ideal study area because of the large number of tailings dams of different sizes and conditions and the availability of satellite images and aerial photographs covering the area. Tailings impoundments conditions are analysed through satellite images, airborne multi-spectral data and aerial photographs captured during the Safari 2000 dry season campaign. Remote sensing interpretation of colour composites of multi-spectral bands, Principal Components and supervised and unsupervised classifications are the methods of analysis used. The overall goal of the project has been achieved through the production of a comprehensive database of tailings impoundments and their rehabilitation status, in an accessible format, containing identity, coordinates, area, rehabilitation status and owner of each tailings impoundment, map them and end up with a comprehensive database of tailings impoundment on the Witwatersrand.
AC2017
Watt-Gremm, Graham Duff. "Taking a good long look : disturbance, succession, landscape change and repeat photography in the upper Blakiston Valley, Waterton Lakes National Park." Thesis, 2007. http://hdl.handle.net/1828/2481.
Full textRoush, William Morgan. "A substantial upward shift of the alpine treeline ecotone in the southern Canadian Rocky Mountains." Thesis, 2009. http://hdl.handle.net/1828/2031.
Full textYe, Nan. "Comparison between high-resolution aerial imagery and lidar data classification of canopy and grass in the NESCO neighborhood, Indianapolis, Indiana." Thesis, 2014. http://hdl.handle.net/1805/5276.
Full textUrban forestry is a very important element of urban structures that can improve the environment and life quality within the urban areas. Having an accurate classification of urban forests and grass areas would help improve focused urban tree planting and urban heat wave mitigation efforts. This research project will compare the use of high – resolution aerial imagery and LiDAR data when used to classify canopy and grass areas. The high – resolution image, with 1 – meter resolution, was captured by The National Agriculture Imagery Program (NAIP) on 6/6/2012. Its coordinate system is the North American Datum of 1983 (NAD83). The LiDAR data, with 1.0 – meter average post spacing, was captured by Indiana Statewide Imagery and LiDAR Program from 03/13/2011 to 04/30/2012.The study area is called the Near East Side Community Organization (NESCO) neighborhood. It is located on the east side of downtown Indianapolis, Indiana. Its boundaries are: 65 interstate, East Massachusetts Avenue, East 21st Street, North Emerson Avenue, and the rail road tracks on the south of the East Washington Street. This research will also perform the accuracy assessment based on the results of classifications using high – resolution aerial imagery and LiDAR data in order to determine and explain which method is more accurate to classify urban canopy and grass areas.