Eleni Tomai

Eleni Tomai
National Technical University of Athens | NTUA · Department of Topography

Dr. Dipl.-ing.

About

49
Publications
10,827
Reads
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251
Citations
Additional affiliations
November 2007 - present
National Technical University of Athens
Position
  • Research Assistant
Education
October 2001 - November 2005
National Technical University of Athens
Field of study
  • Geographic Information Science

Publications

Publications (49)
Article
Full-text available
The massive amount of user-generated content available today presents a new challenge for the geospatial domain and a great opportunity to delve into linguistic, semantic, and cognitive aspects of geographic information. Ontology-based information extraction is a new, prominent field in which a domain ontology guides the extraction process and the...
Article
Numerous attempts have been made to generate semantic “mappings” between different ontologies, or create aligned/integrated ones. An essential step towards their success is the ability to compare the categories involved. This paper introduces a systematic methodology for comparing categories met in geographic ontologies. The methodology explores/ex...
Article
Full-text available
An important issue in geographic ontological research is the ability to design new ontologies. In this context, we first explore the desiderata of domain ontologies in terms of their constituting elements: i.e., the lexicon, concepts, relations, and axioms. Furthermore, we touch upon several characteristics of geographic concepts, which have puzzle...
Article
Full-text available
In this paper, we introduce the idea of documenting operational chains for land degradation assessment using ontologies. We believe that this process will help end users better understand the application domain characteristics and evaluate the results of the assessment process. Since the application domain is wide, various operational chains for la...
Conference Paper
Full-text available
The visualization of semantic information provides new ways for knowledge acquisition and access, since it enables users to explore and understand the meaning of information, as well as to identify associations among data and connections to existing knowledge. Maps on the other hand are extensively used as symbolic representations of spatial realit...
Article
Full-text available
The possibilities of using sound in cartography have been formulated by numerous researchers. However, there are still no general guidelines for mapping data dimensions to auditory variables, while the decision of which spatial data dimension to represent by which sound variable is crucial. The method for embedding sound in maps is commonly known a...
Article
The pilot survey presented herein explores the possibilities given by three-dimensional (3D)-printed maps to students with visual impairment (VI) for learning the spatial distribution of geographic phenomena. The main research questions are: (a) whether students with VI can perceive two phenomena depicted on the same 3D-printed map and (b) whether...
Conference Paper
Full-text available
Differences in spatial abilities between experts and novices have been highlighted in studies. However, one question remains; how STEM-experts differ from non-experts in small- and large-scale abilities. The paper describes the design and implementation of an experimental study for determining their differences in spatial abilities in vista and geo...
Chapter
We present the results of a comparative study among four well-known web mapping services. The study explored how digital natives (young people under 30 years old who were born and raised with technology and smart devices) interact with web mapping services. The sample consisted of 167 University students in the field of Engineering and was conducte...
Article
Full-text available
Research on knowledge discovery in the geospatial domain currently focuses on semi-structured, even on unstructured rather than fully structured content. The attention has been put on the plethora of resources on the Web, such as html pages, news articles, blogs, social media etc. Semantic information extraction in geospatial-oriented approaches is...
Conference Paper
Full-text available
A growing body of geospatial research has shifted the focus from fully structured to semistructured and unstructured content written in natural language. Natural language texts provide a wealth of knowledge about geospatial concepts, places, events, and activities that needs to be extracted and formalized to support semantic annotation, knowledge-b...
Article
Full-text available
The prominence of landmarks in aiding pedestrian navigation has been highlighted in various studies; people rely strongly on visual landmarks, especially when navigating in unfamiliar environments. The paper describes the design and implementation of a study for assessing drivers’ spatial abilities, when navigating in an unfamiliar environment. Two...
Conference Paper
PROMOTING OF THE GEOSPATIAL METHODS: INTRODUCTION INTO INTERNATIONAL EDUCATIONAL COURSES IN ENVIRONMENTAL PROTECTION AND DISASTER RISK MANAGEMENT A. Mansourian1, P. Pilesjo1, M. Runnstrom1, R. Groth1, J.G. Rocha2, M. Santos2, A. Vieira2, M. Kavouras3, M. Kokla3, E. Tomai3, E. Parseliunas4, J. Suziedelyte-Visockiene4, D. Popovas4, R. Obuchovski4, D....
Presentation
Full-text available
The presentation describes the concept of spatial thinking as well as ”VISTE” project entitled ”Empowering spatial thinking of students with visual impairment”.
Technical Report
Full-text available
The subject of "State-of-the-Art Report" concerns spatial thinking in formal (primary and secondary) education for students with visual impairment (VI). More specifically, the report: a) explores what has been put in practice thus far in education regarding spatial thinking of students with VI in Europe and worldwide, and b) answers how to further...
Conference Paper
Full-text available
Several methods have been proposed not only to evaluate but also to enhance spatial thinking skills. However, the role of maps in these processes has not been thoroughly studied. The aim of the present paper is to investigate the extent to which maps are involved in such evaluation and assessment methods. Firstly, existing methods of evaluating and...
Book
Full-text available
Το βιβλίο αποτελεί εισαγωγή στην Επιστήμη της Γεωγραφικής Πληροφορίας (Geographic Information Science - GIScience) η οποία ασχολείται με τη συστηματοποίηση της κατανόησης και αναπαράστασης του γεωγραφικού χώρου, και με τη συλλογή, επεξεργασία, ανάλυση, ερμηνεία, παρουσίαση και διαχείριση των γεωχωρικών δεδομένων του (geospatial data). Δεν ακολουθεί...
Book
Full-text available
Το ηλεκτρονικό βιβλίο παρουσιάζει τη σύγχρονη ολοκληρωμένη θεώρηση της Επιστήμης της Γεωγραφικής Πληροφορίας (ΕΓΠ, Geographic Information Science - GIScience) η οποία ασχολείται με τη συστηματοποίηση της αντίληψης, κατανόησης και αναπαράστασης του γεωγραφικού χώρου. Αν και δεν αποτελεί κατά βάση εισαγωγικό σύγγραμμα, σκοπεύοντας πρωτίστως να καλύψε...
Conference Paper
Full-text available
Spatial thinking has been acknowledged as an important interdisciplinary ability relevant to many aspects of everyday life, workplace, and science. Recently, researchers begun to explore the relation between spatial thinking and other high-level skills and its capacity to constitute a new approach to learning (learn-to-learn), differing from the mo...
Chapter
Full-text available
Spatial thinking has lately been acknowledged as an important ability both for sciences and for everyday life. There is a clear need for enhancing spatial thinking in education and engaging both educators and learners in more critical, inquiry-based teaching and learning methods. In this context, GEOTHNK project is a European effort to propose a sc...
Conference Paper
Full-text available
Recent studies stress the rewarding effects of spatial thinking on students' attainment in STEM disciplines or pursuit of a STEM career. However, there is no rigorous research of the way spatial thinking influences other skills (e.g. problem-solving). Problem-solving skills assist humans in prioritizing their problems and in finding solutions using...
Conference Paper
Full-text available
Spatial (and geospatial) thinking has been well studied and recognized as an important ability of humans and especially for young people and young adults, who most of the times use it subconsciously, from interpreting maps and diagrams to navigating in familiar and non-familiar environments. However, spatial thinking ability is not easy to estimate...
Conference Paper
Full-text available
The GEOTHNK project focuses on spatial thinking, a newly acknowledged ability with profound and rewarding effects on numerous aspects of everyday life and science-from giving and following directions and interpreting maps and diagrams, to achieving innovation in STEM disciplines. Spatial thinking constitutes a key competence for life and work in th...
Conference Paper
Full-text available
Geospatial thinking is a newly acknowledged ability with profound and rewarding effects on numerous aspects of everyday life and science - from giving and following directions and interpreting maps and diagrams, to achieving innovation in STEM disciplines. The GEOTHNK approach aims at enhancing geospatial thinking skills and engaging users in meani...
Article
Οι ιστορικοί χάρτες αποτελούν σημαντικό τμήμα της πολιτιστικής κληρονομιάς μιας χώρας. Αφενός, εκτός από την αισθητική αξία τους, φέρουν πολύτιμη ιστορική πληροφορία και αποτελούν το απαραίτητο γεωγραφικό υπόβαθρο για πλήθος εφαρμογών. Αφετέρου, αποδίδουν την εξέλιξη και τις μεταβολές στο χώρο και το χρόνο των γεωγραφικών οντοτήτων που απεικονίζουν...
Conference Paper
Full-text available
Historical maps deliver valuable historical information which is applicable in several domains while they document the spatiotemporal evolution of the geographical entities that are depicted therein. In order to use the historical cartographic information effectively, the maps’ semantic documentation becomes a necessity for restoring any semantic a...
Conference Paper
Full-text available
Spatialization is a special kind of visualization that projects multidimensional data into low-dimensional representational spaces by making use of spatial metaphors. Spatialization methods face a dual challenge: on the one hand, to apply dimension reduction techniques in order to overcome the limitations of the representational space, and on the o...
Conference Paper
Full-text available
Cognitive mapping has been a well known method for the elicitation, representation and analysis of implicit knowledge. Ontologies on the other hand have come into focus during the last decade to formalise, make explicit and machine-readable implicit knowledge. Nevertheless very few studies have examined the joint use of these two methods to improve...
Article
This paper presents ongoing research in the field of extensional mappings between ontologies. Hitherto, the task of generating mappings between ontologies has focused on the intensional level of ontologies. The term intensional level herein, refers to the set of concepts that are included in an ontology. However, an ontology that has been created f...
Conference Paper
Full-text available
Traditional trip planning involves decisions made by tourists in order to explore an environment, such as a geographic area, usually without having any prior knowledge or experience with it. Contemporary technological development has facilitated not only human mobility but also has set the path for various applications to assist tourists in way-fin...
Conference Paper
Full-text available
This paper presents ongoing research in the field of extensional mappings between ontologies. Hitherto, the task of generating mappings between ontologies has focused on the intensional level of ontologies. The term intensional level refers to the set of concepts that are included in an ontology. However, an ontology that has been created for a spe...
Conference Paper
This paper presents ongoing research in the field of extensional mappings between ontologies. Hitherto, the task of generating mapping between ontologies has been focused on the intensional level of ontologies. The term intensional level refers to the set of concepts that are included in an ontology. However, an ontology that has been created for a...
Chapter
Full-text available
Geographic hypermedia systems include geospatial information from diverse sources. Meaningful access and utilization of such information is materialized only with semantic integration and proper documentation through ontologies. The present work presents a unified view of important research subdomains tasks related to geosemantics and ontologies, (...
Conference Paper
Traditional trip planning involves decisions made by tourists in order to explore an environment, such as a geographic area, usually without having any prior knowledge or experience with it. Contemporary technological development has facilitated not only human mobility but also has set the path for various applications to assist tourists in way-fin...
Conference Paper
Full-text available
The notion of an object bearing information is central to the traditional situation semantics framework. Herein, this notion is extended to the realm of thematic maps as a vehicle for the formalization of their thematic content. Maps are the most acknowledged graphic representations of spatial phenomena. In the light of Situation Theory, we apply i...
Article
Abstract Definitions of categories in existent geospatial ontologies are an invaluable source of information because they provide us with essential knowledge about concepts and their properties. A closer examination reveals that definitions also contain supplementary linguistic items, which are mainly qualitative expressions, such as quantifiers. T...
Conference Paper
Context is a key issue in Knowledge Representation, nevertheless, a formal account of what context is has not yet been agreed on. In the current research we attempt to formalize context as a set of dimensions and their value sets. We focus on the geo-spatial domain and we are particularly interested in incorporating this formalization of context in...
Conference Paper
Full-text available
In this paper, we provide a web-based tool for building geographic ontologies. This work draws from a previously presented framework for building geographic ontologies utilizing Natural Language Understanding Semantics. Several special characteristics of geographic concepts have been tackled therein making it an appropriate framework for providing...
Article
Full-text available
An important subject in geographic analysis is the representation of socioeconomic units (SEUs) on the basis of their characteristics. As a result, similarities and heterogeneities need to be revealed and portrayed accordingly. In this paper, we present a method for the analysis of a particular kind of socioeconomic units, which are the islands of...
Article
this paper, when talking of categories made following the procedure of cognitive categorization, we refer to prototypical ones
Conference Paper
Full-text available
This paper seeks to reveal the semantics of geospatial concepts as it can be elicited from text descriptions. So far, such an approach has dealt with the analysis of existent repositories of geographic information. Taking up with the study of the semantics of geospatial concepts, we turn to the analysis of the linguistic expressions of space and co...
Article
Η παρούσα εργασία πραγματεύεται το πρόβλημα της σχεδίασης οντολογιών για την επιστημονική περιοχή της γεωγραφίας, από μηδενική βάση. Πρώτα αναλύονται τα χρειώδη των οντολογιών σε ότι αφορά τα συστατικά που συγκροτούν αυτές τις οντολογίες (το λεξικό, οι οντότητες, οι σχέσεις και τα αξιώματα). Επιπλέον, αναφέρονται χαρακτηριστικά των γεωγραφικών οντο...
Conference Paper
Full-text available
Vagueness is defined as the possession of borderline cases. Understanding the role of vagueness in a geographic ontology and modeling its effects is a crucial part of ontological research. The analysis of the philosophical notion of identity provides a theoretical tool of dealing with the implications imposed by vagueness. Besides the theoretical a...

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Projects

Projects (6)
Project
GOSTEAM is a three-year duration (2020-2023) KA2 Strategic Partnership in the field of school education, co-funded by the Erasmus+ programme of the European Union. It involves two higher education institutions; Lund University and National Technical University of Athens, three secondary education schools in Austria (BG/BRG Schwechat), Greece (Ellinogermaniki Agogi), and Sweden (Ystad Gymnasium), and a Science Centre in Italy (Fondazione Idis – Città della Scienza). The GOSTEAM Partnership aims to develop educational hands-on STEAM (Science, Technology, Engineering, Art, Mathematics) activities in the fields of Geographic Information Science and Technology, Cartography and Environmental Science for shaping the next generation of geospatially and environmentally aware citizens. Geospatial thinking is a blending of knowledge and skills which supports people in identifying and interpreting location, distance, relationships, orientation, movement, change, patterns, and trends in geoenvironmental space. As a cross-cutting ability for STEAM fields (Science, Technology, Engineering, Arts, Mathematics), social sciences and humanities, as well as for several tasks of daily life, geospatial thinking can be cultivated, with substantial benefits for young people. In the era of “digital natives”, open linked data, digital earth, ubiquitous mapping, citizen science, location-based services and geospatial intelligence, a new civil society of Spatial Citizens is emerging, with the perception, consciousness, and ability to understand, map, communicate and design their world. GOSTEAM addresses teachers/educational staff, as well as secondary education students, cultivating students’ cognitive abilities and skills, such as problem-solving and critical thinking, in the interdisciplinary context of environmental literacy and global awareness.
Project
To provide new theoretical and design principles for cartography and maps that (a) encompass the different types and uses of maps and geovisualizations on the Web, (b) serve the needs of the digitally skilled citizens of our time, and (c) enhance the spatial dimension of almost every piece of web-generated data. The research project is supported by the Hellenic Foundation for Research and Innovation (H.F.R.I.) under the “First Call for H.F.R.I. Research Projects to support Faculty members and Researchers and the procurement of high-cost research equipment grant” (Project Number: HFRI-FM17-2661).