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The Geography Markup Language (GML) -- the existing standard for encoding geospatial data -- has no mechanism for annotating such data with uncertainty. To address this issue while supporting the geospatial community's existing data and service standards, the authors extend GML to enable uncertainty markup. They demonstrate this extension's use with some common geospatial data types and Web services...
NATO has identified Web services as a key enabler for its network enabled capability. Web services facilitate interoperability, easy integration and use of commercial off-the-shelf components, and while request/response-based schemes have hitherto been predominant, publish/subscribe-based services are gaining ground. SOAP-based Web services, however, introduce considerable communication overhead,...
Emerging technologies in web-based services have enabled the integration of global, interdisciplinary earth observations. These capabilities can provide an unprecedented opportunity to promote the establishment and adoption of standards for the delivery of information about sensor systems which can enable data quality assessment by disparate users. Machine-to-machine harvesting of data can either...
This paper reports on the status of a design of a Web-based service that determines the feasibility of a sensor tasking request. The design is based on commercial off the shelf (COTS) capabilities from Analytical Graphics, Inc. (AGI). It is intended for application within a sensor planning service. This Web-based service utilizes the open source parameters employed by the operations, as delineated...
Distributed software systems are characterized by increasing autonomy. They often have the capability to sense the environment and react to it, discover the presence of other systems and take advantage of their services, adapt and re-configure themselves in accordance with the internal as well as the global state. Testing this kind of systems is challenging, and systematic and automated approaches...
The increasing ubiquity of mobile embedded systems has been matched by the evolution of a variety of wireless network standards and technologies. The major constraints of wireless embedded systems are limitations of communication bandwidth, processing capabilities, and battery power. Remote wireless embedded systems often act as sensors, which provide data to a certain community. The exchange of data...
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