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Sensor Observation Service
The Sensor Observation Service (SOS) is a web service to query real-time sensor data and sensor data time series and is part of the Sensor Web. The offered sensor data comprises descriptions of sensors themselves, which are encoded in the Sensor Model Language (SensorML), and the measured values in the Observations and Measurements (O & M) encoding format. The web service as well as both file formats are open standards and specifications of the same name defined by the Open Geospatial Consortium (OGC).
If the SOS supports the transactional profile (SOS-T), new sensors can be registered on the service interface and measuring values be inserted. A SOS implementation can be used both for data from in-situ as well as remote sensing sensors. Furthermore, the sensors can be either mobile or stationary.
Since 2007,〔http://portal.opengeospatial.org/files/?artifact_id=26667〕 the SOS is an official OGC standard. The advantage of the SOS is that sensor data - of any kind - is available in a standardized format using standardized operations. Thus the web-based access to sensor data is simplified. It also allows easy integration into existing Spatial Data Infrastructures or Geographic Information Systems.
== Operations ==
The SOS has three so-called ''core operations'' that must be provided by each implementation. The ''GetCapabilities'' operation allows you to query a service for a description of the service interface and the available sensor data. For using the SOS, the ''GetObservation'' function is probably the most important. It can be utilized to retrieve data for specific sensors. The ''DescribeSensor'' function returns detailed information about a sensor or a sensor system and the producing processes.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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