1. CEOS WGISS, China, February, 2008 1 Sensor Web Enablement (SWE) Wyn Cudlip BNSC/QinetiQ wcudlip@qinetiq.com Presentation to WGISS China, 2008

2. CEOS WGISS, China, February, 2008 2 Introduction o Open GeoSpatial Consortium (OGC) is working on the development of interface standards to support the development of Sensor Webs. o Referred to as SWE o A Sensor Web is more than just interfaces. o True Sensor web includes intelligence or at least a degree of automation so that it offers changing behaviour.

3. CEOS WGISS, China, February, 2008 3 SWE Provides Standard Interfaces

4. CEOS WGISS, China, February, 2008 4 OGC SWE Components o Observations & Measurements (O&M) n XML Encoding compliant with OGC Best Practices Document 05-087r4 n Subset of encoding to handle the following observations – Temperature, Rainfall, Wind Speed/Direction, Humidity, Air Pressure o Sensor Modelling Language (SensorML) n XML Encoding compliant with OGC Implementation Specification 05-086r2 n Subset of encoding to describe the following sensors – Weather Station (WS-2300) – WebCam (e.g. Logitech QuickCam Messenger) o Transducer Markup Language (TML) n XML Encoding compliant with OGC Implementation Specification 06-010r2 n -

5. CEOS WGISS, China, February, 2008 5 OGC SWE Components o Sensor Observation Service (SOS) n XML Encoding compliant with OGC Implementation Specification 06- 009r1 n A web service for describing Sensors and obtaining their Observations

6. CEOS WGISS, China, February, 2008 6 OGC SWE Components o Sensor Planning Service (SPS) n XML Encoding compliant with OGC Implementation Specification 05-089r3 n A web service for tasking a sensor

7. CEOS WGISS, China, February, 2008 7 OGC SWE Components o Sensor Alert Service (SAS) n XML Encoding compliant with OGC Discussion Paper 06-028 n A web service that allows a sensor to be monitored for an alarming condition, e.g. temperature exceeds a given value n A user may subscribe to receive alerts

8. CEOS WGISS, China, February, 2008 8 OGC SWE Components o Web Notification Service (WNS) n XML Encoding compliant with OGC Best Practices Document 06-095 n Web Service for mediating asynchronously between web services, e.g. –Confirmation of a tasking request from an SPS –Issuing an alert from an SAS when an alarming condition occurs

9. CEOS WGISS, China, February, 2008 9 Conclusion o OGC SWE Interface Standards are at an early stage of development. o Good time to test interfaces in real applications. o Provide feedback to developers. o A Sensor Web is more than just interfaces. o Need to consider full end-to-end system. o OSCAR-SWE Demonstrator available at: n http://81.29.75.200/oscar http://81.29.75.200/oscar