Source:
Easiway Wiking - Best Practices in Monitoring Networks (2009)
URL:
http://portal.opengeospatial.org/files/?artifact_id=3201
Keywords:
Sensor Networks, Sensor Service Architecture (SensorSA), Monitoring Network, Air Quality, Standard based Services and Applications
Abstract:
The SANY-IP (http://sany-ip.eu) recently demonstrated the feasibility of building open standard based Environmental Monitoring Systems and decision support applications. The resulting "Sensor Service Architecture v1" specification is available on SANY-IP web site. As part of this activity, Austrian Research Centres (ARC) developed a first prototype of the "SensorSA Data Acquisition System" (SensorSA DAS) and cascading Sensor Observation Service (SOS-X).
The SensorSA DAS is a network capable appliance that allows seamless integration of various sensors in Sensor Service Architecture (SensorSA) compliant network. The complete SensorSA DAS functionality is exposed over OGC Sensor Web Enablement (OGC SWE) interfaces. A Sensor Observation Service (SOS) interface allows access to sensor data, management data, and history of alerts. A Sensor Planning Service (SPS) interface is used for configuration, and combination of the Sensor Alert Service (SAS). A Web Notification Service (WNS) interface allows configuration of events and alerts.
The so-called cascading Sensor Observation Service (SOS-X) is a client to the underlying OGC Sensor Observation service(s) (SOS). It provides alternative access routes to users (or services) interested in accessing data. In addition to a simple cascading, SOS-X can re-format, re-organise, and merge the data from several sources into a single SOS offering. Thanks to a built-in prototype implementation of the "Formula 3" (F3) time series library, SOS-X can even derive new data sets on the fly using arbitrary algebraic operations on one or more data input streams.
The current SOS-X prototype can already provide a custom view to data for a particular group of users, translate between different SOS protocols, expose a subset of internally available data to the outside world, and pre-processes the data using (a prototype implementation of) the F3 algebra. On this workshop, we will present and discuss the current development status and show a best practises example from SANY within the air quality monitoring domain.
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