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Scalable Public Transportation Queries on the Database. Alexandros Efentakis. 19th International Conference on Extending DatabaseTechnology, (EDBT 2016), 2016 Full text


COLD. Revisiting Hub Labels on the Database for Large-Scale Graphs. Alexandros Efentakis, Christodoulos Efstathiades, Dieter Pfoser. 14th International Symposium on Spatial and Temporal Databases (SSTD 2015), 2015 Full text
SALT. A Unified Framework for All Shortest-Path Query Variants on Road Networks. Alexandros Efentakis, Dieter Pfoser, Yannis Vassiliou . 14th International Symposium on Experimental Algorithms (SEA 2015), 2015 Full text


GRASP. Extending Graph Separators for the Single-Source Shortest-Path Problem. Alexandros Efentakis, Dieter Pfoser. 22nd Annual European Symposium on Algorithms (ESA 2014), 2014 Full text
Crowdsourcing turning restrictions for OpenStreetMap. Alexandros Efentakis, Sotiris Brakatsoulas, Nikos Grivas, Dieter Pfoser. Mining Urban Data Workshop, 2014 Full text


Optimizing Landmark-Based Routing and Preprocessing. Alexandros Efentakis, Dieter Pfoser. Sixth ACM SIGSPATIAL International Workshop on Computational Transportation Science (IWCTS '13), 2013 Full text
Towards a Flexible and Scalable Fleet Management Service. Alexandros Efentakis, Sotiris Brakatsoulas, Nikos Grivas, George Lamprianidis, Kostas Patroumpas, Dieter Pfoser. Sixth ACM SIGSPATIAL International Workshop on Computational Transportation Science (IWCTS '13), 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


Crowdsourcing computing resources for shortest-path computation. Alexandros Efentakis, Dimitris Theodorakis, Dieter Pfoser. Proc. 20th ACM SIGSPATIAL GIS Conference, 2012 Full text


Opinion Mapping Travelblogs. Efthymios Drymonas, Alexandros Efentakis, Dieter Pfoser. Terra Cognita Workshop, 2011 Full text
Efficient Data Management in Support of Shortest-Path Computation. Alexandros Efentakis, Dieter Pfoser, Agnes Voisard. 4th ACM SIGSPATIAL International Workshop on Computational Transportation Science, 2011 Full text
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



Combining Geolocated Data for Urban Area Profiling. Danae Pla Karidi, Harry Nakos, Alexandros Efentakis, Yannis Stavrakas. International Journal On Advances in Software, v10 n3&4, 2017


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


Language-Independent Access to History Textbooks - Utilizing GIS Functionality with Spatiotemporal and Thematic Metadata.. Dieter Pfoser, Alexandros Efentakis, Thanasis Hadzilacos, Sophia Karagiorgou, Giorgos Vassiliou. Transactions of GIS 14(6): 773-790, 2010 Full text

Technical Reports

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PhD Theses


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

Diploma Theses




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