In-stream Validation of Measurements with OGC SWE Web Services

As sensor networks grow the amount of sensor measurements increases. This large amount of data is crucial for monitoring systems but useless if it is not trustworthy. In this paper different approaches for the validation of sensor measurements using standardized encodings and services specified by the Open Geospatial Consortium (OGC) are discussed. Approaches based on current OGC specifications for Sensor Web Enablement (SWE) are discussed and their drawbacks are identified. Based on these drawbacks a new architecture for in-stream validation of sensor measurements is introduced. This new approach uses event processing techniques and is based on encodings and services proposed in an OGC SWE discussion paper.