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Sensor Webs

The reason we use the term Sensor Webs is because we envisage different sensor networks being linked by other technologies (Semantic Web and/or GRID) into a sensor web. This term originated at the Jet Propulsion Labs in the USA to mean that the sensor nodes interact closely like a web. Sensor networks need to use data from others which are not directly under their control, including remote sensing and weather data. Thus ultimately sensor network systems will become sensor webs in a wider sense in that they become part of the world wide web. The reason that semantic web technology is needed is that each separate sensor network has no idea what data is available on the web and these techniques allow the "meaning" of external data to be discovered. So although every database tends to use different metadata names/schemas an Ontology can be used to describe their data.