Proceedings, XXth congress: Proceedings, XXth congress

Altan, M. Orhan

Bibliographic data

Multivolume work

Persistent identifier:: 1663674213

Title:: Proceedings, XXth congress

Sub title:: Istanbul, 12 - 23 July 2004

Year of publication:: 2004

Place of publication:: Istanbul

Publisher of the original:: [Verlag nicht ermittelbar]

Identifier (digital):: 1663674213

Language:: English

Additional Notes:: Erscheinungsdatum des Originals ist aus dem Copyrightjahr ermittelt.; Auch bezeichnet als XXth International Congress for Photogrammetry and Remote Sensing

Editor:: Altan, M. Orhan

Corporations:: International Society for Photogrammetry and Remote Sensing, Congress, 20., 2004, Istanbul; International Society for Photogrammetry and Remote Sensing, Commission Primary Data Acquisition

Adapter:: International Society for Photogrammetry and Remote Sensing, Congress, 20., 2004, Istanbul; International Society for Photogrammetry and Remote Sensing, Commission Primary Data Acquisition

Founder of work:: International Society for Photogrammetry and Remote Sensing, Congress, 20., 2004, Istanbul; International Society for Photogrammetry and Remote Sensing, Commission Primary Data Acquisition

Other corporate:: International Society for Photogrammetry and Remote Sensing, Congress, 20., 2004, Istanbul; International Society for Photogrammetry and Remote Sensing, Commission Primary Data Acquisition

Document type:: Multivolume work

Volume

Persistent identifier:: 166368779X

Title:: Proceedings, XXth congress

Scope:: IV, 226 Seiten

Year of publication:: 2004

Place of publication:: Istanbul

Publisher of the original:: [Verlag nicht ermittelbar]

Identifier (digital):: 166368779X

Illustration:: Illustrationen, Diagramme

Signature of the source:: ZS 312(35,B8)

Language:: English

Additional Notes:: Erscheinungsdatum des Originals ist aus dem Copyrightjahr ermittelt.

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Editor:: Altan, M. Orhan

Corporations:: International Society for Photogrammetry and Remote Sensing, Congress, 20., 2004, Istanbul; International Society for Photogrammetry and Remote Sensing

Adapter:: International Society for Photogrammetry and Remote Sensing, Congress, 20., 2004, Istanbul; International Society for Photogrammetry and Remote Sensing

Founder of work:: International Society for Photogrammetry and Remote Sensing, Congress, 20., 2004, Istanbul; International Society for Photogrammetry and Remote Sensing

Other corporate:: International Society for Photogrammetry and Remote Sensing, Congress, 20., 2004, Istanbul; International Society for Photogrammetry and Remote Sensing

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2019

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: SENSOR WEB AND GEOSWIFT - AN OPEN GEOSPATIAL SENSING SERVICE S. H. L. Liang, V. Tao, A. Croitoru

Document type:: Multivolume work

Structure type:: Chapter

International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B-YF. Istanbul 2004 communication equipment; and improved small-scale energy supplies, have combined with reduced manufacturing costs 10 provide an emerging vision for sensor communication: wireless sensor networks. Wireless sensor networks consist of compact, power efficient, battery powered nodes with low range radios and low-cost sensors. Wireless sensor networks have attracted a tremendous amount of attention and media publicity from both the research community and industry.(Hellerstein et al., 2003) A wireless sensor network is low cost, self organizing, self-configuring, and easily expandable. These features allow large scale and random sensor deployment in the field. Thus, a wireless sensor network provides better spatial coverage than traditional sensor networks and better temporal resolution than remote sensing. From a geomatics perspective it is important to note that location has been identified as the key for wireless sensor networks and that localization has become a major research focus in the field of sensor networks.(Hightower and Borriello, 2001) In the future, the aim is to make all sensors location- aware. This provides a great research opportunity for the GIS community since GIS is specialized in dealing with locational data. Figure 3 shows an example of a sensor node that is equipped with a GPS receiver. Figure 3. A sensor board that is equipped with a GPS receiver. (MTS420CA, Crossbow Inc.) It is expected that most communication layers within the sensor web will be hybrid systems, with different solutions being implemented under different constraints. However, ultimately the transferred sensing information is routed through the Internet to the information layer. 1.3.3 Information Layer: The Information layer is the place where the sensing resources can be stored, disseminated, exchanged, managed, displayed and analyzed. Sensing resources include sensors; sensors’ locations; sensors! real-time, near real-time or archived measurements; command and control to sensors; models which need sensor measurements as inputs and other related information for users' applications. The Information Layer of the sensor web has enormous variety of data transport and access demands, data uses and data users. Interoperability is the key to a successful information layer for the sensor web. Users should be able to seamlessly access and readily use sensing resources of the sensor web despite the presence of significant heterogeneity of data, infrastructure (different setting of sensor and network layers) and user requirements. Information layers should support that data from different sources be combined and integrated. Meta data of the sensors and its measurements is also a core for an information layer. Data quality should be described, measured and guaranteed for more sophisticated applications. 82 One of the critical components in the information layer of the SW is to build a geospatial information structure, which spatially enables the sensor web. Any phenomenon measured by sensors must occur at a particular location. Location is an enabling key to make sensors' observations meaningful. As technology advancements in communication and sensor technologies are made, we will see more and more mobile sensors (i.e., moving while collecting measurements). An infrastructure which could store, disseminate, exchange, manage, display and analyze spatial information is vital for the sensor web. The spatial sensor web infrastructure also must meet the requirements of interoperability, openness, transparency, and intelligence, as discussed above. The goal of GeoSWIFT is to provide the missing GlService components to spatially enable the sensor web. 2. GEOSWIFT (GEOSPATIAL SENSOR INFORMATION FUSION TESTBED) At York University's GeoICT Lab, our goal is to develop an open geospatial sensing service for sensor web. In order to have a comprehensive understanding of the research challenges and future applications of sensor web, we establish a testbed environment for sensor web — GeoSWIFT (Geospatial Sensor Web Information Fusion Testbed). GeoSWIFT contains the three layers we discuss above — sensor layer, communication layer, and information layer. The core of GeoSWIFT is an open geospatial sensing service, which serves as a single queryable “global sensor” for sensor web users. GeoSWIFT sensing service includes a GeoSWIFT Server and a GeoSWIFT Viewer. It serves as a gateway for sensor web users; fuses heterogeneous sensing sources and spatial information, such as vector and raster data; and provides transparent sensing information access. GeoSWIFT serves as a proof of the spatial centred sensor web concept. This real-world exercise serves to identify important areas of further work in spatial sensor web and its implication to Geomatics. 2.1 GeoSWIFT Sensing Service We use a new technology framework, Web Services, to design the architecture of GeoSWIFT open geospatial sensing service. Web Services represent the convergence between the service- oriented architecture (SOA) and the World Wide Web. The basic idea of web services is similar to SOA, however, traditional SOA is tightly coupled with specific protocols. Each of the protocols is constrained by dependencies on vendor implementations, platforms, languages, or data encoding schemes that severely limit interoperability. Web services emphasize loose-coupling, openness, interoperability, and simplicity. Web Services support Web-based access, easy integration, and service reusability. For web service's openness, interoperability, and extensibility, it serves as a good foundation to build an open geospatial sensing service for GeoSWIFT. GeoSWIFT is designed with the architecture of GlServices. GIService is to build GISystems with a service-oriented approach that allows users to access and assemble geoprocessing components that are distributed across a network through Internet. GeoSWIFT is adopting OGC Web Service standards for its sensing service. OpenGIS Web Service is a breed of web service and a standards-based framework that will enable seamless integration of a variety of online geoprocessing and geodata services. OGC Web Services will allow distributed

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