Geosynchronization OWS-7 Event Architecture Engineering Report

108 Copyright © 2010 Open Geospatial Consortium, Inc.

11.2 Dynamic Sensor Tracking and Notification

The Sensor Fusion Enablement thread in OWS-7 investigated how the tracking of moving sensors and detection of changes in video streams can be realized using OGC standards, especially the SWE standards. One important component of the resulting service architecture is the Tracking and Notification Service. This is a web service that offers publish subscribe functionality. Its purpose is to continuously monitor the stream of GPS position events of a vehicle and notify the client when it detects that the vehicle entered an Area Of Interest AOI. The change detection process offered by a WPS would then be invoked and clients notified of any detected changes – see the following figure. Figure 36: Dynamic sensor tracking and notification – use case of the OWS-7 SFE thread More detailed information about dynamic sensor tracking and notification can be found in OGC document 10-061.

11.3 Aviation

The aviation thread in OWS-7 used Event Service functionality to notify subscribed clients – flight dispatchers and pilots – of events that were of interest to a planned or ongoing flight. Aeronautical events e.g. of runway closures and special use airspace activations as well as weather events e.g. severe thunderstorms that are located within a certain distance of an aircraft’s flight path were detected and delivered to the respective clients. These events were then visualized and appropriate actions taken – for example to Copyright © 2010 Open Geospatial Consortium, Inc. 109 reroute the aircraft or divert to an alternative airport. The according use case is illustrated in the following figure. Figure 37: Monitoring flights and detecting relevant aeronautical and weather events – use case of the OWS-7 Aviation thread More detailed information about the aviation event architecture can be found in OGC document 10-079. 12 Standards and specifications related to the Event Architecture

12.1 Service models

12.1.1 Introduction

In this section the relations between different service specifications and binding technologies that influence the event architecture or are influenced by the event architecture are introduced. The goal is to describe the connections between different specifications and to give an overview of the timeline.

12.1.2 OGC service specifications related to the Event Architecture

Here, the timeline and connection between those OGC service specifications is shown that influence the Event Architecture. These services either are designed as a kind of Event Service like the SAS or SES or they have primarily a different scope but make use of eventing technologies for specific purposes like the SPS. Figure 38 gives an overview of the timeline and the relations between the Sensor Alert Service SAS, the Sensor Event Service SES, the planned Event Service, the Event Architecture, the Web Notification Service WNS and the Sensor Planning Service SPS.