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Συνέδρια/Workshops

A Parallel and Distributed Approach for Diversified Top-k Best Region Search . Hamid Shahrivari, Matthaios Olma, Odysseas Papapetrou, Dimitrios Skoutas, Anastasia Ailamaki. Proceedings of the 23rd International Conference on Extending Database Technology (EDBT 2020), 2020 Full text
Voronoi Diagram of Orthogonal Polyhedra in Two and Three Dimensions. I.Z. Emiris, Christina Katsamaki. SEA² 2019: 1-20 , 2019 Full text
Exposing Points of Interest as Linked Geospatial Data. Kostas Patroumpas, Dimitrios Skoutas, Georgios Mandilaras, Giorgos Giannopoulos, Spiros Athanasiou. Symposium on Spatial and Temporal Databases (SSTD 2019), 2019 Full text
Big POI data integration with Linked Data technologies. Spiros Athanasiou, Giorgos Giannopoulos, Damien Graux, Nikos Karagiannakis, Jens Lehmann, Axel-Cyrille Ngonga Ngomo, Kostas Patroumpas, Mohamed Ahmed Sherif, Dimitrios Skoutas . 22nd International Conference on Extending Database Technology (EDBT) 2019: 477-488, 2019 Full text
SLIPO: Large-Scale Data Integration for Points of Interest. Spiros Athanasiou, Michail Alexakis, Giorgos Giannopoulos, Nikos Karagiannakis, Yannis Kouvaras, Pantelis Mitropoulos, Kostas Patroumpas, Dimitrios Skoutas . 22nd International Conference on Extending Database Technology (EDBT) 2019: 574-577, 2019 Full text
Products of euclidean metrics and applications to proximity questions among curves. I.Z. Emiris and I. Psarros. Annual Symp. on Computational Geometry (SoCG), pages 37:1–37:13, 2018 Full text
Finding shortest keyword covering routes in road networks. Vassilis Kaffes, Alexandros Belesiotis, Dimitrios Skoutas, Spiros Skiadopoulos. 30th International Conference on Scientific and Statistical Database Management (SSDBM 2018), 2018 Full text
Selecting representative and diverse spatio-textual posts over sliding windows. Dimitris Sacharidis, Paras Mehta, Dimitrios Skoutas, Kostas Patroumpas, Agnès Voisard. 30th International Conference on Scientific and Statistical Database Management (SSDBM 2018), 2018 Full text
On-the-fly Mobility Event Detection over Aircraft Trajectories. Kostas Patroumpas, Nikos Pelekis, Yannis Theodoridis. 26th ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems (ACM SIGSPATIAL 2018), 2018 Full text
Efficient Progressive and Diversified Top-k Best Region Search. Dimitrios Skoutas, Dimitris Sacharidis, Kostas Patroumpas. 26th ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems (ACM SIGSPATIAL 2018), 2018 Full text
Matrix Representations by Means of Interpolation. I.Z. Emiris, Christos Konaxis, I.S. Kotsireas, Clément Laroche. ACM ISSAC 2017: 149-156 , 2017 Full text
Continuous Summarization of Streaming Spatio-Textual Posts. Dimitris Sacharidis, Paras Mehta, Dimitrios Skoutas, Kostas Patroumpas, Agnès Voisard. 25th ACM International Conference on Advances in Geographic Information Systems (SIGSPATIAL 2017), 2017 Full text
Probabilistic k-Nearest Neighbor Monitoring of Moving Gaussians. Kostas Patroumpas, Christos Koutras. 29th International Conference on Scientific and Statistical Database Management (SSDBM 2017), 2017 Full text
μTOP: Spatio-Temporal Detection and Summarization of Locally Trending Topics in Microblog Posts. Paras Mehta, Manuel Kotlarski, Dimitrios Skoutas, Dimitris Sacharidis, Kostas Patroumpas, Agnès Voisard. Proceedings of the 20th International Conference on Extending Database Technology (EDBT) 2017: 558-561, 2017 Full text
Finding Socio-Textual Associations Among Locations. Paras Mehta, Dimitris Sacharidis, Dimitrios Skoutas, Agnès Voisard. Proceedings of the 20th International Conference on Extending Database Technology (EDBT) 2017: 120-131, 2017 Full text
Indexing Geolocated Time Series Data. Georgios Chatzigeorgakidis, Dimitrios Skoutas, Kostas Patroumpas, Spiros Athanasiou, Spiros Skiadopoulos. 25th ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems (ACM SIGSPATIAL 2017), 2017 Full text
Coverage and diversity aware top-k query for spatio-temporal posts. Paras Mehta, Dimitrios Skoutas, Dimitris Sacharidis, Agnès Voisard. Proceedings of the 24th ACM International Conference on Advances in Geographic Information Systems (SIGSPATIAL) 2016: 37:1-37:10, 2016 Full text
Learning to Classify Spatiotextual Entities in Maps. Giorgos Giannopoulos, Nikos Karagiannakis, Dimitrios Skoutas, Spiros Athanasiou. Extending Semantic Web Conference 2016 (ESWC 2016), 2016 Full text
Keyword-based retrieval of frequent location sets in geotagged photo trails. Paras Mehta, Dimitris Sacharidis, Dimitrios Skoutas, Agnès Voisard. 8th International Conference on Web Science (WebSci 2016), 2016 Full text
Similarity Search on Spatio-Textual Point Sets. Christodoulos Efstathiades, Alexandros Belesiotis, Dimitrios Skoutas, Dieter Pfoser. 19th International Conference on Extending Database Technology (EDBT 2016), 2016 Full text
Identifying and Describing Streets of Interest. Dimitrios Skoutas, Dimitris Sacharidis, Kostas Stamatoukos. 19th International Conference on Extending Database Technology (EDBT 2016), 2016 Full text
TwitterViz: Visualizing and Exploring the Twittersphere. Christodoulos Efstathiades, Helias Antoniou, Dimitrios Skoutas, Yannis Vassiliou. Symposium on Spatial and Temporal Databases (SSTD) 2015 (Demo track), 2015 Full text
FAGI-gis: A Tool for Fusing Geospatial RDF Data. Giorgos Giannopoulos, Nick Vitsas, Nikos Karagiannakis, Dimitrios Skoutas, Spiros Athanasiou. The 12th Extended Semantic Web Conference, Demo Track, 2015, 2015 Full text
OSMRec tool for automatic recommendation of categories on spatial entities in OpenStreetMap. Giorgos Giannopoulos, Nikos Karagiannakis, Dimitrios Skoutas, Spiros Athanasiou. 9th ACM Conference on Recommender Systems, Demo and Posters Track, 2015 (RecSys 2015), 2015 Full text
Automatic Recommendations of Categories for Geospatial Entities. Giorgos Giannopoulos, Nikos Karagiannakis, Dimitrios Skoutas, Spiros Athanasiou. ACM RecSys Workshop on Location-Aware Recommendations (LocalRec 2015), 2015 Full text
Towards Open Big Geospatial Data for geodata.gov.gr. Angelos Tzotsos, Michail Alexakis and Spiros Athanasiou. FOSS4G-Europe 2015, 2015 Full text
Spatio-temporal Big Data: the rasdaman approach in the context of the PublicaMundi project. Mircea Alexandru Dumitru, Vlad Merticariu, Angelos Tzotsos, Michail Alexakis and Spiros Athanasiou. FOSS4G-Europe 2015, 2015 Full text
Exposing INSPIRE on the Semantic Web. Kostas Patroumpas, Spiros Athanasiou. INSPIRE-Geospatial World Forum 2015 , 2015 Full text
PublicaMundi, an FP7 project aiming to make open geospatial data easier to publish, view, and reuse. Thodoris Vakkas, Georgia Papadaki, Alexandros Theleritis, Spiros Athanasiou,. INSPIRE-Geospatial World Forum 2015 , 2015 Full text
TripleGeo-CSW: A Middleware for Exposing Geospatial Catalogue Services on the Semantic Web. Spiros Athanasiou, Nikos Georgomanolis, Kostas Patroumpas, Michail Alexakis, and Thodoris Stratiotis. 5th International Workshop on Linked Web Data Management (LWDM), Brussels, 2015, 2015 Full text
Continuous monitoring of nearest trajectories. Dimitris Sacharidis, Dimitrios Skoutas, Georgios Skoumas. 22nd ACM International Conference on Advances in Geographic Information Systems (SIGSPATIAL 2014), 2014 Full text
Geosemantic Network-of-Interest Construction Using Social Media Data. Sophia Karagiorgou, Dieter Pfoser, Dimitrios Skoutas. Geographic Information Science, 2014 Full text
Extraction, integration and exploration of crowdsourced geospatial content from multiple web sources. George Lamprianidis, Dimitrios Skoutas, George Papatheodorou, Dieter Pfoser. 22nd ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems (Demo track), 2014 Full text
Extraction, integration and analysis of crowdsourced points of interest from multiple web sources. George Lamprianidis, Dimitrios Skoutas, George Papatheodorou, Dieter Pfoser. 3rd ACM SIGSPATIAL International Workshop on Crowdsourced and Volunteered Geographic Information, GeoCrowd 2014, 2014 Full text
Greek Geospatial Linked Data: geodata.gov.gr/sparql. Kostas Patroumpas, Nikos Georgomanolis, Thodoris Stratiotis, Michail Alexakis, Spiros Athanasiou. 8th Greek HellasGIs Conference, Athens, Greece, December, 2014, 2014 Full text
The GeoKnow Generator: Managing Geospatial Data in the Linked Data Web. Jon Jay Le Grange, Jens Lehmann, Spiros Athanasiou, Alejandra Garcia Rojas, Giorgos Giannopoulos, Daniel Hladky, Robert Isele, Axel-Cyrille Ngonga Ngomo, Mohamed Sherif, Claus Stadler. Linking Geospatial Data Workshop, 2014, 2014 Full text
FAGI-tr: A tool for aligning geospatial RDF vocabularies. Giorgos Giannopoulos, Thomas Maroulis, Dimitrios Skoutas, Nikos Karagiannakis, Spiros Athanasiou. The 11th Extended Semantic Web Conference, Demo Track, 2014 (ESWC 2014), 2014 Full text
TripleGeo: an ETL Tool for Transforming Geospatial Data into RDF Triples. Kostas Patroumpas, Michalis Alexakis, Giorgos Giannopoulos, Spiros Athanasiou. EDBT/ICDT Workshops 2014: 275-278, 2014 Full text
FAGI: A framework for fusing geospatial RDF data. Giorgos Giannopoulos, Dimitrios Skoutas, Thomas Maroulis, Nikos Karagiannakis, Spiros Athanasiou. The 13th International Conference on Ontologies, DataBases, and Applications of Semantics, 2014 (ODBASE 2014), 2014 Full text
Towards GeoSpatial Semantic Data Management: Strengths, Weaknesses, and Challenges Ahead. Kostas Patroumpas, Giorgos Giannopoulos, Spiros Athanasiou. ACM SIGSPATIAL 2014, 2014 Full text
PublicaMundi: Scalable and Reusable Open Geospatial Data. Spiros Athanasiou. FOSS4G-Europe 2014, 2014 Full text
Online Analysis of Remote Sensing Data for Agricultural Applications. Athanasios Karmas, Konstantinos Karantzalos, Spiros Athanasiou. FOSS4G-Europe 2014, 2014 Full text
Location Recommendation in Location-Based Social Networks Using User Check-in Data. Hao Wang, Manolis Terrovitis and Nikos Mamoulis. ACM SIGSPATIAL 2013, 2013 Full text
Isochrones, Traffic and DEMOgraphics. Alexandros Efentakis, Nikos Grivas, George Lamprianidis, Georg Magenschab, Dieter Pfoser. ACM SIGSPATIAL GIS 2013, November 5-8, 2013 Orlando, Florida, USA, 2013 Full text
GeoKnow: Leveraging Geospatial Data in the Web of Data. Alejandra Garcia-Rojas, Spiros Athanasiou, Jens Lehmann, Daniel Hladky. Open Data on the Web (ODW) Workshop, Shoreditch, London, 2013, 2013 Full text
Crowdsourcing computing resources for shortest-path computation. Alexandros Efentakis, Dimitris Theodorakis, Dieter Pfoser. Proc. 20th ACM SIGSPATIAL GIS Conference, 2012 Full text
On Vehicle Tracking Data-Based Road Network Generation. Sophia Karagiorgou, Dieter Pfoser. Proc. 20th ACM SIGSPATIAL GIS Conference, 2012 Full text
Collaborative Geospatial Feature Search. George Lamprianidis, Dieter Pfoser. Proc. 20th ACM SIGSPATIAL GIS Conference, 2012 Full text
Building the Hellenic National Geospatial Infrastructure from Scratch: Challenges, Legislation, Progress and Experiences. Konstantinos Nedas, Kaliope Pediaditi, Spiros Athanasiou, Prodroms Tsiavos, Giorgos Moutevelis. INSPIRE Conference 2011, Edinburgh, UK, 2011 Full text
Opinion Mapping Travelblogs. Efthymios Drymonas, Alexandros Efentakis, Dieter Pfoser. Terra Cognita Workshop, 2011 Full text
Jeocrowd - Collaborative Searching of User-Generated Point Datasets. George Lamprianidis, Dieter Pfoser. ACM SIGPATIAL Symposium (ACM GIS 2012), 2011 Full text
On User-Generated Geocontent. Dieter Pfoser. 12th Symposium on Spatial and Temporal Databases (SSTD), 2011
Mobile Task Computing: Beyond Location-based Services and Ebooks. John Liagouris, Spiros Athanasiou, Alexandros Efentakis, Stefan Pfennigschmidt, Dieter Pfoser, Eleni Tsigka, Agnes Voisard. 10th Int'l Symposium on Web and Wireless Geographical Information Systems (W2GIS), 2011 Full text

Περιοδικά

Implicit representations of high-codimension varieties. I.Z. Emiris, Christos Konaxis, Clément Laroche. Computer Aided Geometric Design 74, 2019 Full text
Visual Exploration of Geolocated Time Series with Hybrid Indexing. Georgios Chatzigeorgakidis, Kostas Patroumpas, Dimitrios Skoutas, Spiros Athanasiou, Spiros Skiadopoulos. Big Data Research, Volume 15 (pp. 12-28), 2019 Full text
Analyzing and Predicting Spatial Crime Distribution Using Crowdsourced and Open Data. Alexandros Belesiotis, George Papadakis, Dimitrios Skoutas. ACM Trans. Spatial Algorithms and Systems 3(4): 12:1-12:31, 2018 Full text
Spatio-textual user matching and clustering based on set similarity joins. Alexandros Belesiotis, Dimitrios Skoutas, Christodoulos Efstathiades, Vassilis Kaffes, Dieter Pfoser. The VLDB Journal, Volume 27, 2018 Full text
A Layered Approach for More Robust Generation of Road Network Maps from Vehicle Tracking Data. Sophia Karagiorgou, Dieter Pfoser, Dimitrios Skoutas. ACM Trans. Spatial Algorithms and Systems 3(1): 3:1-3:21 (2017), 2017 Full text
Exposing INSPIRE on the Semantic Web. Kostas Patroumpas, Nikos Georgomanolis, Thodoris Stratiotis, Michail Alexakis, Spiros Athanasiou,. Journal of Web Semantics, Special Issue on Geospatial Semantics, 2015 Full text
Crowdsourcing urban form and function. Andrew Crooks, Dieter Pfoser, Andrew Jenkins, Arie Croitoru, Anthony Stefanidis, Duncan Smith, Sophia Karagiorgou, Alexandros Efentakis & George Lamprianidis. International Journal of Geographical Information Science: pages 1-22, 2015, 2015 Full text
GeoKnow: Making the Web an Exploratory Place for Geospatial Knowledge. Spiros Athanasiou, Daniel Hladky, Giorgos Giannopoulos, Alejandra Garcia Rojas and Jens Lehmann. Ercim news 2014, 2014(96), 2014 Full text
GeoKnow: Geo-Anwendungen im Daten-Web. Jens Lehmann, Konrad Höffner, Sandra Prätor, Stephanie Lehmann, Axel Ngonga, Alejandra Garcia-Rojas, Spiros Athanasiou. gis.Business (2013), 2013 Full text

Τεχνικές Αναφορές

Gov 2.0 on a tight budget: The case of geodata.gov.gr. Spiros Athanasiou, Kaliope Pediaditi, Konstantinos Nedas, Prodromos Tsiavos. TR20110129, 2011 Full text

Διδακτορικές Διατριβές

Shortest-path algorithms on road networks and real-world applications. Alexandros Efentakis. PhD Thesis, School of Electrical and Computer Engineering, National Technical University of Athens, Greece, 2014 Full text

Διπλωματικές Εργασίες

Big Geospatial Data Analysis with Array Technologies for Agricultural Applications. Thanasis Karmas. Diploma Thesis, School of Electrical and Computer Engineering, National Technical University of Athens, Greece, 2014 Full text
AthensTreeMap: Crowdsourcing Urban Vegetation. Stylianos Kalogridis. MSc. Thesis, School of Rural and Surveying Engineering, National Technical University of Athens, Greece, 2013 Full text
Mobile Geoblogging Client - Developing a Social Geoblogging Application for Android. Konstantinos Papagiannopoulos. School of Electrical and Computer Engineering, NTUA, 2011
Geotyping - Online Geocoding of Narratives. Sokratis Vidros. School of Electrical and Computer Engineering, NTUA, 2011
Geoblogging - Creating a Semantically Rich World Map. Charikleia Lontou. Postgraduate Program in Geoinformatics, School of Rural and Surveying Engineering, NTUA, 2010
Development a Geo Microbogging Application for Android. Nikolaos Tsiougkos. School of Electrical and Computer Engineering, NTUA, 2010 Full text
Geocrowd Explorer : Augmented Reality Application For Consumption of Geoblogging Content. Stelios Doudalis. School of Electrical and Computer Engineering, NTUA, 2010 Full text
Georeferencing and routing tool for survey management. Nikolaos Kostoulas. School of Electrical and Computer Engineering, NTUA, 2010 Full text
Real Estate Agent as a web application. Michalis Paignigiannis. MSc. Thesis, School of Rural and Surveying Engineering, National Technical University of Athens, Greece, 2009 Full text
BENZInet: Geospatial comparison and sampling of gas prices. Katerina Papadaki. MSc. Thesis, School of Rural and Surveying Engineering, National Technical University of Athens, Greece, 2009 Full text
Semi-automatic Geocoding for Prersistent Web pages. Charikleia Lontou. School of Electrical and Computer Engineering, NTUA, 2008 Full text
Friends in Range. Georgios Lamprianidis. School of Electrical and Computer Engineering, NTUA, 2008 Full text

Βιβλία

Managing Geospatial Linked Data in the GeoKnow Project. Jens Lehmann, Spiros Athanasiou, Andreas Both, Alejandra Garcia Rojas, Giorgos Giannopoulos, Daniel Hladky, Jon Jay Le Grange, Axel-Cyrille Ngonga-Ngomo, Mohamed Ahmed Sherif, Claus Stadler, Matthias Wauer, Patrick Westphal. The Semantic Web in Earth and Space Science. Current Status and Future Directions, Vol. 20 of Studies on the Semantic Web. IOS Press., 2015 Full text
Cultivating Open Data Ecologies: Lessons from the Implementation of the INSPIRE Directive. Prodromos Tsiavos, Kaliope Pediaditi, Konstantinos Nedas, Spiros Athanasiou. In “Geographic Data and the Law: Defining New Challenges”, Leuven University Press, 2012 Full text
Proceedings of the 12th International Symposium on Advances in Spatial and Temporal Databases. Pfoser, D., Tao, Y., Mouratidis, K., Nascimerento, M., Mokbel, M., Shekhar, S., and Huang, Y.. Springer-Verlag, 2011 Full text