KRR&A Team in Big Data Europe

Change Detection from Remote Sensing and Social Media Sources

Big Data Europe is a project in the H2020 program of the European Commission.

The Big Data Europe project

The growing digitization and networking process within our society has a large influence on all aspects of everyday life. Large amounts of data are being produced permanently, and when these are analyzed and interlinked they have the potential to create new knowledge and intelligent solutions for economy and society. Big Data can make important contributions to the technical progress in our societal key sectors and help shape business. What is needed are innovative technologies, strategies and competencies for the beneficial use of Big Data to address societal needs.

The Big Data Europe project is an H2020 action which develops a big data infrastructure and applies it to the seven societal challenges of the H2020 programme:

  • Health
  • Food & Agriculture
  • Energy
  • Transport
  • Social Sciences
  • Security

  • The National and Kapodistrian University of Athens as a partner in Big Data Europe

    Our group is the technical leader for the developments regarding the Security societal challenge. We work closely with the European Union Satellite Center (SatCen) and the Greek research center N.C.S.R. Demokritos to develop a change detection application which uses information from Sentinel satellite images and social media sources. The application is depicted in the following figure.

    The architecture of the SC7-Pilot

    The change detection application is realized by two workflows. The change detection workflow uses satellite images to detect areas with changes in land cover or land use. The identified areas of interest are then associated with social media and news items and presented to the end user for cross validation. The event detection workflow works in the opposite direction: it is triggered by news and social media information about important events. When these events are localized in time and space, relevant Sentinel satellite images are acquired and processed in order to check for possible changes in land cover or land use.

    The application utilizes the following Big Data technologies: News Crawler, Cassandra, Event Detector, Lookup Service, Sextant, SemaGrow, Strabon, GeoTriples, Image Aggregator, HDFS and Change Detector

    The above change detection application is an illustration of the importance of data from the Copernicus programme of the European Commission for addressing societal challenges in Europe.

    You can use the pilot by pressing this link.
    After sign-up, send us an e-mail to give you access.


  • Sören Auer, Simon Scerri, Aad Versteden, Erika Pauwels, Angelos Charalambidis, Stasinos Konstantopoulos, Jens Lehmann, Hajira Jabeen, Ivan Ermilov, Gezim Sejdiu, Andreas Ikonomopoulos, Spyros Andronopoulos, Mandy Vlachogiannis, Charalambos Pappas, Athanasios Davettas, Iraklis A. Klampanos, Efstathios Grigoropoulos, Vangelis Karkaletsis, Victor de Boer, Ronald Siebes, Mohamed Nadjib Mami, Sergio Albani, Michele Lazzarini, Paulo Nunes, Emanuele Angiuli, Nikiforos Pittaras, George Giannakopoulos, Giorgos Argyriou, George Stamoulis, George Papadakis, Manolis Koubarakis, Pythagoras Karampiperis, Axel-Cyrille Ngonga Ngomo, Maria-Esther Vidal. The BigDataEurope Platform – Supporting the Variety Dimension of Big Data. International Conference on Web Engineering (ICWE), Rome, Italy, 5-8 June 2017 [pdf]

  • Sergio Albani, Michele Lazzarini, Manolis Koubarakis, Efi Karra Taniskidou, George Papadakis, Vangelis Karkaletsis, George Giannakopoulos. Integrating Remote and Social Sensing Data for a Scenario on Secure Societies in a Big Data Platform. Living Planet Symposium 2016, Prague, Czech Republic, May 2016

  • Sergio Albani, Michele Lazzarini, Manolis Koubarakis, Efi Karra Taniskidou, George Papadakis, Vangelis Karkaletsis, George Giannakopoulos. A Pilot for Big Data Exploitation in the Space and Security Domain. Conference on Big Data from Space (BiDS), Tenerife, Spain, March 2016 [pdf]
  • Our Team


    • Sergio Albani
    • Emanuele Angiuli
    • Michele Lazzarini
    • Paulo Nunes

    Contact Information

    Feel free to contact us at: koubarak[at], gioargyr[at]