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2009, First Open Source GIS UK …
When developing client applications for OGC Web services, it is necessary to implement connectors that are able to interact with the according service interfaces. Since the interaction with OGC Web services is standardized and thus common for multiple client applications, the open source initiative 52°North started in 2006 the development of the OX-Framework -a software framework whose architecture can be used to ease and encapsulate the utilization of OGC Web Services. This framework has gained maturity in the past years and has recently been used as the technological basis for innovative Sensor Web applications in several projects. This work gives an overview of the framework's architecture and subsequently presents examples of open source Sensor Web applications built on top of it. Fig.1: Overview of the OGC SWE framework
Lecture Notes in Computer Science, 2006
The Open Geospatial Consortium (OGC) standards activities that focus on sensors and sensor networks comprise an OGC focus area known as Sensor Web Enablement (SWE). Readers interested in greater technical and architecture details can download the OGC SWE Architecture Discussion Paper titled “The OGC Sensor Web Enablement Architecture” (OGC document 06-021r1).
2006
As sensor network deployments begin to grow there emerges an increasing need to overcome the obstacles of connecting and sharing heterogeneous sensor resources. Common data operations and transformations exist in deployment scenarios and can be encapsulated into a layer of software services that hide the complexity of the underlying infrastructure from the application developer. NICTA Open Sensor Web Architecture (NOSA) is built upon the Sensor Web Enablement (SWE) standard defined by the Open Geospatial Consortium (OGC), which is composed of a set of specifications, including SensorML, Observation & Measurement, Sensor Collection Service, Sensor Planning Service and Web Notification Service. NOSA presents a reusable, scalable, extensible, and interoperable service oriented Sensor Web architecture that (i) conforms to the SWE standard; (ii) integrates Sensor Web with Grid Computing and (in) provides middleware support for Sensor Webs.
As sensor network deployments grow and mature there emerge a common set of operations and transformations. These can be grouped into a conceptual framework called Sensor Web. Sensor Web combines cyber infrastructure with a Service Oriented Architecture (SOA) and sensor networks to provide access to heterogeneous sensor resources in a deployment independent manner. In this chapter we present the Open Sensor Web Architecture (OSWA), a platform independent middleware for developing sensor applications. OSWA is built upon a uniform set of operations and standard data representations as defined in the Sensor Web Enablement Method (SWE) by the Open Geospatial Consortium (OGC). OSWA uses open source and grid technologies to meet the challenging needs of collecting and analyzing observational data and making it accessible for aggregation, archiving and decision making.
The Sensor Web Enablement (SWE) architecture of the Open Geospatial Consortium (OGC) has reached a broad acceptance. However, although the core specifications reached a mature state, the integration of a cataloguing service for sensors has not yet been achieved. Previous work focused on registries that address the specifics of dynamic sensor networks, on mechanisms for handling the semantics of phenomena and on metadata models based on the Sensor Model Language (SensorML). This work describes how existing elements supporting sensor discovery can be coupled with the already well established OGC Catalogue Service (CSW). The approach presented in this work relies on a SensorML profile specifying metadata necessary and sufficient for sensor discovery. SensorML documents that conform to the profile are automatically harvested from SWE services by a lower level registry and are subsequently transformed into an information model supported by the CSW. Finally the metadata is pushed into CSW instances and becomes available through the CSW interface. In summary, this work presents for the first time a working example how resources provided through SWE services can automatically be published through common OGC Catalogue Service instances. We expect that the presented approach is an important step in order to achieve a full integration of SWE components into spatial data infrastructures and to offer SWE services to a broader audience.
Sensors, 2011
Many sensor networks have been deployed to monitor Earth's environment, and more will follow in the future. Environmental sensors have improved continuously by becoming smaller, cheaper, and more intelligent. Due to the large number of sensor manufacturers and differing accompanying protocols, integrating diverse sensors into observation systems is not straightforward. A coherent infrastructure is needed to treat sensors in an interoperable, platform-independent and uniform way. The concept of the Sensor Web reflects such a kind of infrastructure for sharing, finding, and accessing sensors and their data across different applications. It hides the heterogeneous sensor hardware and communication protocols from the applications built on top of it. The Sensor Web Enablement initiative of the Open Geospatial Consortium standardizes web service interfaces and data encodings which can be used as building blocks for a Sensor Web. This article illustrates and analyzes the recent developments of the new generation of the Sensor Web Enablement specification framework. Further, we relate the Sensor Web to other
13th AGILE International …, 2010
Transactions in GIS, 2009
A key problem with sensor networks is achieving interoperability between different networks potentially built using different software and hardware platforms. Services interfaced by the Open Geospatial Consortium (OGC) specifications allow GIS clients to access geospatial data without knowing the details about how these data are gathered or stored. Currently, OGC is working on a set of interoperable interfaces and metadata encodings known as Sensor Web Enablement (SWE) that enables the integration of heterogeneous sensor systems and measurements into geospatial information infrastructures. In this article we present the implementation of gvSOS, a new module for gvSIG to connect to Sensor Observation Services (SOS). The gvSOS client module allows gvSIG users to interact with SOS servers, displaying the information gathered by sensors as a layer composed by features. We present the software engineering development process followed to build the module. For each step of the process we s...
Proceedings of the NASA Science Technology …
, in response to a NASA Announcement of Research Opportunity on the topic of sensor webs. The key goal of this research is to prototype an interoperable sensor architecture that will enable interoperability between a heterogeneous set of space-based, Unmanned Aerial System (UAS)-based and ground based sensors. Among the key capabilities being pursued is the ability to automatically discover and task the sensors via the Internet and to automatically discover and assemble the necessary science processing algorithms into workflows in order to transform the sensor data into valuable science products. Our first set of sensor web demonstrations will prototype science products useful in managing wildfires and will use such assets as the Earth Observing 1 spacecraft, managed out of NASAIGSFC, a UASbased instrument, managed out of Ames and some automated ground weather stations, managed by the Forest Service. Also, we are collaborating with some of the other ESTO awardees to expand this demonstration and create synergy between our research efforts. Finally, we are making use of Open Geospatial Consortium (OGC) Sensor Web Enablement (SWE) suite of standards and some Web 2.0 capabilities to Beverage emerging technologies and standards.
International Journal of Distributed Sensor Networks, 2014
Connecting the sensing devices present in the physical world to detect and measure various physical phenomenon such as temperature, humidity, and pollution into a network and presenting them as web resources to the end users have become the goal of a variety of research activities. As the physical network of these devices inherently possesses a heterogeneous nature thus most of the sensor web studies are based on providing domain specific solutions. Service-oriented architecture (SOA) has proven successes to resolve the scalability and evolvability of the web. The present solutions for the SOA based sensor web allows the users to access the sensor data as services but to integrate these services the client must put extra effort to implement the logic. We present an improved SOA based sensor web architecture which offers an easy approach to integrate sensor providers' services with information provider services and enable the users to access it as a single, integrated, and searchable service. This approach offers the functionality present in the existing solutions as well as an integrated data access or service mashup. We discuss in detail an instance architecture for indoor environment monitoring, based on the proposition of this study.
2013
Abstract: In this paper we provide an overview of emerging Sensor Web paradigm and show several practical issues of using Sensor Web technologies for real-world tasks. Issues under study include sensor description using SensorML and database performance for serving observations data. This paper also shows an approach for integrating standard Sensor Observation Service with Globus Toolkit Grid platform.
Online unter: http://www. …, 2006
11th AGILE International …, 2008
The Sensor Observation Service (SOS) of the Open Geospatial Consortium (OGC) defines a web service to distribute sensor data. During the utilization of the SOS in different mobile sensor use cases of the OSIRIS project deficits of the specification were identified. For example, the SOS specification lacks the ability to update information about deployed mobile sensors (e.g. position or status) dynamically. This work presents the concept of an interoperable web service interface (SOSmobile) allowing the exchange of mobile sensor data. The requirement for such a service arises due to the fast growing number of applications which incorporate mobile sensors. To enable the integration of data collected by mobile sensors into multiple applications the use of an appropriate interoperable encoding as well as a well-defined interface to access the data is essential. After introducing the SOS and the related data models the deficits are being described and the new SOSmobile interface based upon the OGC SOS specification is defined.
The aim of this paper is to describe a performance evaluation of the interface model of Sensor Web Enablement, especially highlighting the Sensor Observation Service, Sensor Event Service and Sensor Instance Registry. These standards provide a transparent and interoperable way to access data measured by sensors. Studies found in the literature do not treat a performance evaluation on highlighted services in a detailed way. So, the performance evaluation in our study considers several factors that can influence the access time on these services. The results show an important influence of different filter types in the service response times. The result analysis demonstrated that the implementation of application that uses these services should be careful on use of these filters, as, due their definition, the performance of these applications can decrease.
2013
inspiration. I would also like to give many thanks to mom & dad (Iva & Melvin Greene) for supporting my efforts to pursue education and strengthening my drive along the way. To my beautiful wife and lovely daughter, Christa & LeiLani, thank you for all the support and the extra push that I needed. v Table of Contents List of Figures .
2013
Wireless Sensor Networks (WSNs) integrated with web services are becoming common in widespread applications across the world. WSNs are developed in different application domains of sensor and user types, with each typically relying on its own metadata semantics, data format and software. There is a high demand for standardising access to sensor data via internet without having to use some complex and unknown protocol. Thus, Service Oriented Architecture (SOA) is one of the key paradigms that enables the deployment of services at large-scale over the internet domain and its integration with WSNs could open new pathways for novel applications and research. The sensor web enablement initiative (SWE) within the Open Geospatial Consortium (OGC) has released a set of open standards for interoperable interface specifications and (meta) data encodings for the real time integration of sensors and sensor networks into a web services architecture. This paper describes integration of WSNs into a SOA by proposing a web service proxy linkage of the low level sensor platform to the high level SWE sensorweb architecture to treat sensors in an interoperable, platform-independent and uniform way.
ifgi.uni-muenster.de
In recent years, the standards of OGC's Sensor Web Enablement (SWE) initiative have been applied in a multitude of projects to encapsulate heterogeneous geosensors for web-based discovery, tasking and access. Currently, SWE services and the different types of geosensors are integrated manually due to a conceptual gap between these two layers. Pair-wise adapters are created to connect an implementation of a particular SWE service with a particular type of geosensor. This approach is contrary to the aim of reaching interoperability and leads to an extensive integration effort in large scale systems with various types of geosensors and various SWE service implementations.
2016
The complexity of marine installations for ocean observing systems has grown significantly in recent years. In a network consisting of tens, hundreds or thousands of marine instruments, manual configuration and integration becomes very challenging. Simplifying the integration process in existing or newly established observing systems would benefit system operators and is important for the broader application of different sensors. This article presents an approach for the automatic configuration and integration of sensors into an interoperable Sensor Web infrastructure. First, the sensor communication model, based on OGC's SensorML standard, is utilized. It serves as a generic driver mechanism since it enables the declarative and detailed description of a sensor's protocol. Finally, we present a data acquisition architecture based on the OGC PUCK protocol that enables storage and retrieval of the SensorML document from the sensor itself, and automatic integration of sensors i...
GSDI 11 World Conference, …, 2009
This paper presents the practical application of the OGC Sensor Web Enablement Architecture to a set of use cases in the area of risk monitoring and disaster management. After introducing the OGC Sensor Web Enablement framework, use cases ranging from hydrological monitoring and measuring different types of pollution to fire fighting applications will be presented.
ISPRS International Journal of Geo-Information
Finding a solution to collect, analyze, and share, in near real-time, data acquired by heterogeneous sensors, such as traffic, air pollution, soil moisture, or weather data, represents a great challenge. This paper describes the solution developed at Eurac Research to automatically upload data, in near real-time, by adopting Open Geospatial Consortium (OGC) Sensor Web Enablement (SWE) standards to guarantee interoperability. We set up a methodology capable of ingesting heterogeneous datasets to automatize observation uploading and sensor registration, with minimum interaction required of the user. This solution has been successfully tested and applied in the Long Term (Socio-)Ecological Research (LT(S)ER) Matsch-Mazia initiative, and the code is accessible under the CC BY 4.0 license.
ifgi.uni-muenster.de
In the past, a multitude of projects have demonstrated the applicability of OGC's Sensor Web Enablement (SWE) standards. SWE services have been used to encapsulate heterogeneous geosensors for web-based discovery, access, tasking, and alerting. Thereby, the integration of geosensors had to be established by manually adapting each SWE service implementation. This approach is cumbersome and leads to an extensive integration effort in large scale sensor network systems. To overcome these obstacles this work presents the Sensor Bus, an open source project facilitating the integration of new geosensors into the Sensor Web.
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