Publication accepted for UrbanGIS2017 – Linked Data and Visualization: Two Sides of the Transparency Coin!

The paper “Linked Data and Visualization: Two Sides of the Transparency Coin” by Auriol Degbelo has been accepted for presentation at the upcoming UrbanGIS Workshop on Smart Cities and Urban Analytics.

Abstract: Transparency is an important element of smart cities, and ongoing work is exploring the use of available open data to maximize it. This position paper argues that Linked Data and visualization play similar roles, for different agents, in this context. Linked Data increases transparency for machines, while visualization increases transparency for humans. The work also proposes a quantitative approach to the evaluation of visualization insights which rests on two premises: (i) visualizations could be modelled as a set of statements made by authors at some point in time, and (ii) statements made by experts could be used as ground truth while evaluating how much insights are effectively conveyed by visualizations on the Web. Drawing on the linked data rating scheme of Tim Berners-Lee, the paper proposes a five-stars rating scheme for visualizations on the Web. The ideas suggested are relevant to the development of techniques to automatically assess the transparency level of existing visualizations on the Web.

Feature-centric algorithms for georeferenced video search

The paper “Feature-centric ranking algorithms for georeferenced video search” (Authors: Holger Fritze, Auriol Degbelo, Tobias Brüggentisch and Christian Kray) has been accepted for presentation at the upcoming ACM SIGSPATIAL International Conference on Advances in Geographic Information Systems!

Abstract: While it is commonplace to retrieve photos showing a particular feature (e.g. through tools such as Google Pictures or Bing Images), spatial approaches for retrieving videos showing a particular feature (e.g. a building) have yet to be established. This article proposes five ranking algorithms to query georeferenced videos for a specific feature based on the videos’ spatio-temporal metadata. 12 relevance criteria for feature-centric video ranking were compiled from a focus group discussion. From these, four criteria have been selected for implementation: “Feature Depiction”, “Feature Illumination”, “Feature Visibility Duration”, and “Distance to Feature”. These criteria were implemented in five algorithms and evaluated regarding efficiency and user perceived plausibility. The evaluation suggests that the “Feature Visibility Duration” of the video’s viewshed with the queried feature geometry offers a good trade-off between computationally performant and cognitive plausible ranking. The obtained results are relevant to user-centered approaches for interacting with georeferenced videos.


Publication accepted for SEMANTICS 2017!

The paper “A Snapshot of Ontology Evaluation Criteria and Strategies” by Auriol Degbelo has been accepted for presentation at the 13th International Conference on Semantic Systems.

Abstract: Ontologies are key to information retrieval, semantic integration of datasets, and semantic similarity analyses. Evaluating ontologies (especially defining what constitutes a “good” or “better” ontology) is therefore of central importance for the Semantic Web community. Various criteria have been introduced in the literature to evaluate ontologies, and this article classifies them according to their relevance to the design or the implementation phase of ontology development. In addition, the article compiles strategies for ontology evaluation based on ontologies published until 2017 in two outlets: the Semantic Web Journal, and the Journal of Web Semantics. Gaps and opportunities for future research on ontology evaluation are exposed towards the end of the paper.

4th Workshop on geogames and geoplay co-organized by UJI Geo-C

The 20th international conference on geographic information science – Agile 2017 hosted at Wageningen, The Netherlands, was the perfect space to exchange and discuss ideas about games, playfulness, gamification and geospatial technologies at the Fourth workshop on geogames and geoplay co-organized by GEOTEC (Geo-C) and the Geogames team from University of Bamberg, the thematic focus defined for the workshop was “Gamifying the Open Smart City”.

The Five selected papers explored a wide range of concepts related to this research field, from the use of the serious games approach for gathering critical spatial thinking, an agent-based simulation framework for geogrames, to three different available geogames (NavApps, Smart Beetles, and BioDiv2Go). The hands on session allowed to shape one experiment from the GEO-C (www.geo-c-eu) european project aiming to promote cycling as a feasible commuting mode combining gamification and geographical information sciences.

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Research colloquia: “Running a virtual, cloud-based company for sensor-based air and water monitoring”

Dr. Edward Pultar is visiting one week in May. He is a former visiting scholar at UJI and founding member of (, an entirely cloud-based company managed together with his brother. How can a self-funding, bootstrapped company, manage international customers around the world? What is their business model? What is the trick? VAlarm is basically a software as a service company. Software is the main product. They sometimes sell the hardware solutions, because some customers demand a single provider to manage sw&hw together. In other cases, they create software tools, APIs and real-time dashboards for existing hardware when customers already possess their sensors. So, Valarm provides cloud-based software tools for remotely monitoring industrial IoT systems and sensors. Look at the customer stories ( for really real-life IoT deployments and successful use cases.

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Five researchers of the GEO-C team and one from the SenseBox team attended GEOTAG 2017 which took place in Münster on May 17, 2017. GEOTAG was visited by around 300 participants and gathered various institutions (companies, city council, university) from Münsterland. The theme of the day was “Digital Society – Digital Transformation” (“Digitale Gesellschaft – Digitaler Wandel”). GEO-C presented the Open City Toolkit and set up a stand where participants gave feedback about the use of open data for private companies and products that open smart cities could find interesting. Some pictures from the day:

Auriol Degbelo’s presentation on the Open City Toolkit

Group picture with posters from Diego Pajarito (ESR07), Shivam Gupta (ESR08), Mehrnaz Ataei (ESR13) and the SenseBox roll up

We thank the visitors of our stand for their feedback!

UJI shows the GEO-C project to two thousand students during the FIRAUJICIENCIA ’17

On April 6th, GEO-C UJI team (GEOTEC) has participated in the third edition of FIRAUJICIENCIA. There, we had the opportunity to show our project to more than around two thousand students and teachers. More than sixty workshops have filled the sports hall of the Universitat Jaume I with science. Also, GEOTEC showed other projects, like Sucre4Kids, where the students learn to program using electronic components and a visual programming language.
The scientific fair has gathered at the Universitat Jaume I students and lecturers from more than thirty educational centres throughout the province who have had the opportunity to learn more about dinosaurs, urban waste, electromagnetism, meteorites, water or robots.

Call for PhD in Smart Sustainable Cities assessment framework is now open. Applications open until 14 April 2017

Eligibility Criteria

We target international and national holders of a Masters degree (or equivalent) related to GI. The field of Geoinformatics is interdisciplinary, so previous studies can be in GI or any GI application area, such as geography, ecology, transportation, forestry, energy provision, computer science, geology, etc., which is relevant for the research topic Sustainable Smart Cities assessment framework (see below).

Typically, the diploma/certificate confirming the completion of the Masters degree has to be submitted with the application documents. In exceptional cases, applicants can provide a transcript of records of the Masters program with courses attended so far. In that case he/she will provide the final diploma/certificate at the selection/interview phase. In case you don’t have your diploma by then but you are going to get it very soon, contact the supervisor to talk about your case.

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