Object-based Mapping of Temperate Marine Habitats from Multi-resolution Remote Sensing Data PDF Download
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Author: Paula Lightfoot
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Paula Lightfoot
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Yeqiao Wang
Publisher: CRC Press
ISBN: 1420094424
Category : Nature
Languages : en
Pages : 460
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As coastal environments around the world face unprecedented natural and anthropogenic threats, advancements in the technologies that support geospatial data acquisition, imaging, and computing have profoundly enhanced monitoring capabilities in coastal studies. Providing systematic treatment of the key developments, Remote Sensing of Coastal Enviro
Author: James A. Goodman
Publisher: Springer Science & Business Media
ISBN: 9048192927
Category : Technology & Engineering
Languages : en
Pages : 446
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Book Description
Remote sensing stands as the defining technology in our ability to monitor coral reefs, as well as their biophysical properties and associated processes, at regional to global scales. With overwhelming evidence that much of Earth’s reefs are in decline, our need for large-scale, repeatable assessments of reefs has never been so great. Fortunately, the last two decades have seen a rapid expansion in the ability for remote sensing to map and monitor the coral reef ecosystem, its overlying water column, and surrounding environment. Remote sensing is now a fundamental tool for the mapping, monitoring and management of coral reef ecosystems. Remote sensing offers repeatable, quantitative assessments of habitat and environmental characteristics over spatially extensive areas. As the multi-disciplinary field of coral reef remote sensing continues to mature, results demonstrate that the techniques and capabilities continue to improve. New developments allow reef assessments and mapping to be performed with higher accuracy, across greater spatial areas, and with greater temporal frequency. The increased level of information that remote sensing now makes available also allows more complex scientific questions to be addressed. As defined for this book, remote sensing includes the vast array of geospatial data collected from land, water, ship, airborne and satellite platforms. The book is organized by technology, including: visible and infrared sensing using photographic, multispectral and hyperspectral instruments; active sensing using light detection and ranging (LiDAR); acoustic sensing using ship, autonomous underwater vehicle (AUV) and in-water platforms; and thermal and radar instruments. Emphasis and Audience This book serves multiple roles. It offers an overview of the current state-of-the-art technologies for reef mapping, provides detailed technical information for coral reef remote sensing specialists, imparts insight on the scientific questions that can be tackled using this technology, and also includes a foundation for those new to reef remote sensing. The individual sections of the book include introductory overviews of four main types of remotely sensed data used to study coral reefs, followed by specific examples demonstrating practical applications of the different technologies being discussed. Guidelines for selecting the most appropriate sensor for particular applications are provided, including an overview of how to utilize remote sensing data as an effective tool in science and management. The text is richly illustrated with examples of each sensing technology applied to a range of scientific, monitoring and management questions in reefs around the world. As such, the book is broadly accessible to a general audience, as well as students, managers, remote sensing specialists and anyone else working with coral reef ecosystems.
Author: Luba Yvanka Reshitnyk
Publisher:
ISBN:
Category :
Languages : en
Pages :
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The ability to map nearshore habitat (i.e. submerged aquatic vegetation) is an integral component of marine conservation. The main goal of this thesis was to examine the ability of high resolution, multispectral satellite imagery and a single-beam acoustic ground discrimination system to map the location of marine habitats in Bag Harbour, found in the Gwaii Haanas National Marine Conservation Area Reserve. To meet this goal, two objectives were addressed: (1) Using the QTC View V sing-beam acoustic ground discrimination system, identify which frequency (50 kHz or 200 kHz) is best suited for mapping marine habitat; (2) evaluate the ability to map nearshore marine habitat using WorldView-2 high resolution, multispectral satellite imagery and compare the results of marine habitat maps derived from the acoustic and satellite datasets. Ground-truth data for both acoustic and satellite data were collected via towed underwater video camera on June 3rd and 4th, 2012. Acoustic data (50 and 200 kHz) were collected on June 23rd and 24th, 2012, respectively. The results of this study are organized into two papers. The first paper focuses on objective 1 where the QTC View V single-beam acoustic ground discrimination system was used to map nearshore habitat at a site within the Gwaii Haanas National Marine Conservation Area using two survey frequencies--50 kHz and 200 kHz. The results show that the 200 kHz data outperformed the 50 kHz data set in both thematic and spatial accuracy. The 200 kHz dataset was able to identify two species of submerged aquatic vegetation, eelgrass (Zostera marina) and a red algae (Chondrocanthus exasperatus) while the 50 kHz dataset was only able to detect the distribution of eelgrass. The best overall accuracy achieved with the 200 kHz dataset was 86% for a habitat map with three classes (dense eelgrass, dense red algae and unvegetated substrate) compared to the 50 kHz habitat classification with two classes (dense eelgrass and unvegetated substrate) that had an overall accuracy of 70%. Neither dataset was capable if discerning the distribution of green algae (Ulva spp.) or brown algae (Fucus spp.), also present at the site. The second paper examines the benthic habitat maps created using WorldView-2 satellite imagery and the QTC View V single-beam acoustic ground discrimination system (AGDS) at 200 kHz (objective 2). Optical and acoustic remote sensing technologies both present unique capabilities of mapping nearshore habitat. Acoustic systems are able to map habitat in subtidal regions outside of the range of optical sensors while optical sensors such as WorldView-2 provide higher spatial and spectral resolution. The results of this study found that the WorldView-2 achieved the highest overall accuracy (75%) for mapping shallow (3 m) benthic classes (green algae, brown algae, eelgrass and unvegetated substrate). The 200 kHz data were found to perform best in deeper (3 m) regions and were able to detect the distribution of eelgrass, red algae and unvegetated substrate. A final habitat map was produced composed of these outputs to create a final, comprehensive habitat map of Bag Harbour. These results highlight the benefits and limitations of each remote sensing technology from a conservation management perspective ... .
Author: Charles W. Finkl
Publisher: Springer
ISBN: 331906326X
Category : Science
Languages : en
Pages : 514
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Book Description
This book is geared for advanced level research in the general subject area of remote sensing and modeling as they apply to the coastal marine environment. The various chapters focus on the latest scientific and technical advances in the service of better understanding coastal marine environments for their care, conservation and management. Chapters specifically deal with advances in remote sensing coastal classifications, environmental monitoring, digital ocean technological advances, geophysical methods, geoacoustics, X-band radar, risk assessment models, GIS applications, real-time modeling systems, and spatial modeling. Readers will find this book useful because it summarizes applications of new research methods in one of the world’s most dynamic and complicated environments. Chapters in this book will be of interest to specialists in the coastal marine environment who deals with aspects of environmental monitoring and assessment via remote sensing techniques and numerical modeling.
Author: Qi Chen
Publisher: Routledge
ISBN: 1000436209
Category : Political Science
Languages : en
Pages : 187
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Book Description
Detailed and accurate information on the spatial distribution of individual species over large spatial extents and over multiple time periods is critical for rapid response and effective management of environmental change. The twenty first century has witnessed a rapid development in both fine resolution sensors and statistical theories and techniques. These innovations hold great potential for improved accuracy of species mapping using remote sensing. Fine Resolution Remote Sensing of Species in Terrestrial and Coastal Ecosystems is a collection of eight cutting-edge studies of fine spatial resolution remote sensing, including species mapping of biogenic and coral reefs, seagrasses, salt and freshwater marshes, and grasslands. The studies illustrate the power of fine resolution imagery for species identification, as well as the value of unmanned aerial vehicle (UAV) imagery as an ideal source of high-quality reference data at the species level. The studies also highlight the benefit of LiDAR (Light Detection and Ranging) data for species identification, and how this varies depending on the species of interest as well as the nature of the context in which the species is found. The broad range of applications explored in the book demonstrates the major contribution of remote sensing to species-level terrestrial and coastal ecosystem studies as well as the potential for future advances. The chapters in this book were originally published as a special issue of the International Journal of Remote Sensing.
Author: Eric Baptist
Publisher:
ISBN:
Category :
Languages : en
Pages : 69
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Author: Edmund Peter Green
Publisher: Unesco
ISBN:
Category : Nature
Languages : en
Pages : 356
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The Handbook provides a detailed evaluation of what can realistically be achieved by remote sensing in an operational coastal management context. It takes the user through the planning and implementation of remote sensing projects from the setting of realistic objectives, deciding which imagery will be most appropriate to achieve those objectives, the acquisition, geometric and radiometric correction of imagery, the field survey methods needed to ground-truth the imagery and guide image classification, the image processing techniques required to optimise outputs, through the image interpretation and evaluation of the accuracy of outputs. Linked to the Handbook is a computer-based remote sensing distance-learning module: Applications of satellite and airborne image data to coastal management available free of charge via www.unesco.bilko.org
Author: Monica Montefalcone
Publisher: Frontiers Media SA
ISBN: 2832532314
Category : Science
Languages : en
Pages : 146
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Book Description
Landscape ecology has been a discrete, established discipline since at least 1980. Its marine counterpart, seascape ecology, is barely a decade old, its first applications dating from the early 2010s. Lack of perception of the marine environment hampers the adoption of many landscape ecology approaches to the sea. Seascape ecology relies on special technologies such as remote sensing (either acoustic or optical), robotics, and scuba diving. Both disciplines deal with the spatial configuration of ecosystems and consider environmental heterogeneity and dynamics as the main subjects of study and the key for ecosystem functioning and persistence. Seascape is here intended as the totality of natural and anthropogenic characters of a marine region. To the geologist, it is defined by sedimentology and underwater geomorphology, to the biologist by the nature of the living cover of the seafloor, to the ecologist by the relationships among functional processes and the spatial organization of ecosystems. The goal of this research topic is to encourage original research, case studies, reviews, and viewpoints to identify research priority gaps and possibly contribute to filling them in. We will appreciate, in particular, manuscripts dealing with recent advances such as high-resolution habitat mapping; underwater soundscape and biophony; development, application and validation of biotic indices to assess seafloor integrity (as requested, for instance, by recent European Directives). Papers of interest may discuss the multivarious facets of stability and describe resistance and resilience patterns, the role of stress and disturbance, regime shift and phase shift, or may take up the challenge of integrating coastal landscape and seascape analyses. Studies of long-term series are welcome, as well as methodological improvements, and macroecological approaches on the importance of species diversity and connectivity in seascape organization.
Author: Jared Kibele
Publisher:
ISBN:
Category : Aquatic habitats
Languages : en
Pages : 179
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Book Description
Thematic maps of submerged coastal habitats are essential to ecological studies and marine spatial planning processes. The analysis of multispectral satellite imagery provides a cost effective method for mapping shallow habitats. However, the interaction of light with the water column greatly complicates the production of maps from imagery. A number of water column correction (WCC) methods have been devised to address this complexity, but the remote sensing literature in which these methods are described tend to focus on novelty rather than practical implementation. Consequently, methods are often tailored to specific environmental conditions and described in very technical terms, source code for implementation is rarely provided, and potential users are typically unable to understand or make use of existing WCC methods without expert assistance. This thesis seeks to address this situation by developing new methods, suitable for the widest possible range of environmental conditions, and releasing free and open source software for their implementation. The methods and software presented address the entire process from ground truth data collection and processing with the free and open source software (FOSS) Benthic Photo Survey (BPS), through to depth estimation, image processing, water column correction, and accuracy assessment with the FOSS OpticalRS Python library. BPS expedites and greatly simplifies the processing of field data. The novel empirical depth estimation method presented provides better accuracy than a widely used physics based method and requires fewer image processing steps. The parameter estimation and WCC methods presented improve on previous methods in terms of accuracy, simplicity, and flexibility. Combined with pre-existing FOSS image classification software, these methods and tools form the Marine Optical Remote sEnsing Map and Assessment Production System (MORE-MAPS). To demonstrate the efficacy of MORE-MAPS, broad scale submerged habitats in and around the temperate waters of Cape Rodney to Okakari Point Marine Reserve in northeastern New Zealand were mapped to a depth of 20m with an overall accuracy of 83%, and the results were compared with previous habitat maps of the reserve that were based largely on direct observation and manual photo interpretation methods, and with optical remote sensing studies from temperate regions outside of New Zealand. MORE-MAPS was found to provide mapping accuracy comparable to previous optical remote sensing studies, and to provide better accuracy, greater geographic coverage, and lower cost than the previous mapping efforts within the reserve. Overall, the methods and tools developed in this thesis demonstrate potential to greatly reduce the cost and complexity of habitat mapping and, thereby, increase the capacity for map production in New Zealand and throughout temperate, subtropical, and tropical coastal regions worldwide.
