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Informatik 5
Information Systems
Prof. Dr. M. Jarke
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Dr. Lemonia Ragia

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Contact Information

Address: Lehrstuhl Informatik 5
6238, 2nd floor, building: E2
Ahornstr. 55
52056 Aachen
Phone: +49 / 241 / 80 215 15
Fax: +49 / 241 / 80-22321

Short Biography

Dr. Ing. Lemonia Ragia has a diploma degree (1993) from the Department of Rural and Surveying Engineering at the Aristotle University of Thessaloniki, Greece. Her doctoral degree (2001) was at the Institute of Photogrammetry, University of Bonn, Germany. Her doctoral thesis was entitled, ‘A data quality model for validating photogrammetric data Acquisition’. After completing her doctoral thesis she joined the Fraunhofer Institute for Autonomous Intelligent Systems as a Post-Doctoral Fellow 2001-2003. Since April 2003 she is working as a research scientist at the  computer science department of the Technical University of Aachen in the area of Geoinformatics. She worked in several projects in different application areas of image processing, data quality, and spatial data mining. 

In 2003 she visited the group of Phil Bernstein at Microsoft Research to work on schema matching for Geo data.

Research Interests

  • Analysis and Quality of 3D data
  • Data mining and Applications
  • Spatial and Geographic Database Systems
  • Knowledge Representation of Geoinformation
  • Design and development of application frameworks
  • Spatial Data Modelling


Completed Projects



Person Publications

Christoph Quix, Lemonia Ragia, L. Cai, T. Gan

Matching Schemas for Geographical Information Systems Using Semantic Information

Proc. of Workshop on Semantic-Based Geographical Information Systems (SeBGIS), OTM Confederated International Workshops, Montpellier, France, LNCS 4278, Springer-Verlag, pp. 1566-1575, 2006

Lemonia Ragia, A. El Isbihani, C. Kiehle

A Web Service for Groundwater Vulnerability

Protection and Restoration of the Environment VIII, Chania, Greece 3-7 July 2006

Lemonia Ragia

Seven Important Issues to a Successful Geo Model

IEEE Conference IPSI 2005 Special focus: Quality of life, Bled, Slovenia, December 8-11, 2005

More publications…