With the BigDataEurope project entered its second year, a second online hang-out event “Big Data in Secure Societies” was organized by the European Union Satellite Centre (EU SatCen) on the 21st April 2016 (11.00-12-00 CET). This online event, followed by members of SMEs and public entities from Europe, aimed to keep everybody updated on the “Secure Societies” Horizon 2020 Societal Challenge activities in the framework of the project, in particular on the description of the pilot currently under development for the Big Data Europe platform. The pilot for the Secure Societies Societal Challenge was designed by the EU SatCen (together with the University of Athens and the NCSR “Demokritos”) considering the requirements coming from relevant stakeholders. The pilot considers two different workflows of data (Fig. 1) and it is focusing on the integration in a Big Data platform of data coming from remote and social sensing, also providing tools for satellite data analysis in order to add value to the current data exploitation practices. This is particularly key in the Space and Security domain, where useful information can be derived not only from satellite data but also from data coming from a number of different sources.
– The Change Detection workflow ingests satellite images to detect areas with changes on land cover or land use by using change detection techniques; the identified Area of Interest (AoI) is then associated with social media and news agencies items and presented to the user for cross-validation;
– The reverse procedure is applied to the Event Detection workflow. Event detection is triggered by social media and news agencies information, where trending topics with geospatial connotation constitute a time- and space- localized event. Provided such an event, the corresponding satellite images are acquired and processed in order to check for changes in land cover or land use.
The first presentation was delivered by Sergio Albani (EU SatCen), Secure Societies domain leader: his presentation highlighted the role of SatCen in the BDE project and how the related community activities (e.g. user requirements elicitation, workshop and conference organizations) are building a Space and Security community with an interest on Big Data exploitation.
The second presentation was delivered by Michele Lazzarini (EU SatCen) who illustrated the Big Data challenges in the Space and Security domain and how the collected requirements drove the Change Detection workflow, analysing the image processing steps constituting the workflow.
The third presentation was delivered by George Giannakopoulos (NCSR “Demokritos”) who showed the Big Data challenges in social media analysis and how the information extraction steps from selected sources constitutes the Event Detection workflow.
The webinar was concluded by the presentation of George Papadakis (University of Athens), who described how the architecture of the pilot was designed to accommodate both the Change Detection and the Event Detection workflows, supported by a Graphical User interface and a Common Workflow.