Knowledge Graphs in Action 2020

DBpedia, Linked Geodata and Geo-information Integration - SEMANTiCS Satellite event on October 6, 2020

Joint Event by DBpedia, EuroSDR and PLDN

The SEMANTiCS Onsite Conference 2020 had to be postponed till September 2021. Only pre-recorded videos and a live moderation will be shown on September 9, 2020. To bridge the gap until 2021, we took the opportunity to organize the Knowledge Graphs in Action online track as a SEMANTiCS satellite event on October 6, 2020. This new online conference is a combination of two existing events: the DBpedia Community Meeting, which is held annually as part of the SEMANTiCS, and the annual Spatial Linked Data conference organized by EuroSDR and the Platform Linked Data Netherlands. We glued it together and as a bonus, we added a track about Geo-information Integration organized by EuroSDR. As special joint sessions we will present three keynote speakers. The DBpedia Meeting is part of the conference and covers a Hackathon, a DBpedia Showcase Session and a special chapter session in which DBpedia language chapters from different parts of Europe will present the latest developments.

Quick Facts

  • Web URL:
  • When: October 6, 2020
  • Where: The conference will take place fully online.
  • Attending the conference is free. Registration is required though. Please register to be part of the meeting. After the registration for the event, you will receive an email with more instructions. Please get in touch with us if you have any problems during the registration stage.

Register now!


  • Benedicte Bucher, University Gustave Eiffel, IGN, EuroSDR
  • Erwin Folmer, Kadaster, University of Twente, Platform Linked Data Netherlands
  • Rob Lemmens, University of Twente
  • Sebastian Hellmann, AKSW/KILT, DBpedia Association
  • Julia Holze, DBpedia Association
  • Joep Crompvoets, KU Leuven
  • Peter Mooney, Maynooth University




Sept 17th - Begin EuroSDR VGI Datathon

Sept 21st - Begin DBpedia Hackathon

Oct 5th - 17:00 - DBpedia Hackathon Final Event

October 6th

Timezone CEST / GMT+2

9:50 - 10:00

Opening Session

Opening by the Organizers

10:00 - 10:30

Keynote Data Infrastructure for Energy System Models by Carsten Hoyer-Klick, German Aerospace Center (abstract)

chair: Sebastian Hellmann, InfAI/DBpedia Association

10:30 - 12:00

Parallel Sessions

Session 1 : Spatial Linked Data Country Update

chair: Benedicte Bucher, University Gustave Eiffel, IGN, EuroSDR

In this session updates will be presented about the uptake and latest progress of Spatial Linked Data adoption in European countries, either within national mapping agencies or beyond.

Session 2: VGI country presentations

chair: Peter Mooney, Maynooth University

There is an increasing use of crowdsourced geo-information (CGI) in spatial data applications by National Mapping and Cadastral Agencies (NMCAs). Applications range from using CGI for supporting the actualisation of spatial data to adding extra content, such as land use, building entrances, road barriers, sensors placed in the public space and many more. This session will host presentations from NMCAs showing the status of their CGI integration in mapping applications and processes.

Session 3 : DBpedia Member presentations

chair: Sebastian Hellmann, InfAI/DBpedia Association

In this session members of the DBpedia Association will present their latest tools, applications and technical developments.

  • Welcome & Introduction by chair
  • (12+2) Filipe Mesquita (Diffbot) “Beyond Human Curation: How Diffbot Is Building A Knowledge Graph of the Web”
  • (12+2) Margaret Warren (ImageSnippets) “Creating and Using Image Graphs: Recent Research in AI Augmented Construction and Using Images for Inference”
  • (12+2) Tzvi Weitzner ( “Graph algorithms working over relational databases (a world’s first)”
  • (12+2) Susana López (GNOSS) “Artificial Intelligence for the Augmented Reading in the Prado Museum collection and in the Didactalia lessons: two use cases of application of DBpedia and Linked Data in culture and education for greater knowledge and contextualization of the information”
  • (12+2) Vassil Momtchev (Ontotext) “From strings to things with the GraphDB 9.4 mapping UI”

12:00 - 13:00


13:00 - 13:30

Keynote Opportunities for a more integrated approach

to Geo-information integration by Peter Mooney, Maynooth University

chair: Joep Crompvoets, KU Leuven  

13:30 - 14:00

1. Building a National KG for the Netherlands – the results so far, a new methodology for connecting knowledge graphs via LOD - Sebastian Hellmann, InfAI/DBpedia Association
2. EuroSDR initiative to build a KG about geographical digital assets in Europe - Benedicte Bucher, University Gustave Eiffel, IGN, EuroSDR

14:00 - 15:00

Parallel Sessions

Session 4: Transforming Linked Data into a networked data economy - DBpedia Chapter Session

chair: Milan Dojchinovski, InfAI/DBpedia Association/CTU in Prague

13 years ago DBpedia served as a crystallization point for the web of data, which developed into the LOD Cloud. Starting with the Dutch National Knowledge Graph, we will explore the opportunity to grow domain-specific LOD communities around DBpedia Nexuses with a scalable Global ID space. To bootstrap this process, we asked DBpedia Chapter leads and members to give an overview about the data landscape in their country, identify business opportunities and speak about important challenges, such as automated clearance of licenses.

Session 5: EuroSDR VGI Datathon results

chair: Rob Lemmens, University of Twente

This datathon intends to uncover new combinations and integration of CGI data with data from NMCAs which demonstrate the added value for map creation and map usage. Data wrangling (the process of creating small reproducible data processing workflows) is deployed for this work by using and combining existing geospatial software (desktop, web and mobile). In this session the results of the data wrangling process are presented. 

Session 6: Spatial Session

chair: Erwin Folmer (Kadaster, University of Twente)

In this session we will focus on building Knowledge Graphs in the first part, and in the second part on tooling & state of the art on working with Linked Data.

Part 1 – Knowledge Graphs (55 min)

  • (5) Welcome & Introduction by chair
  • (7+3) TBA
  • (7+3) Mehdi Zrhal (IGN) “Dataset search and Knowledge Graphs”

Part 2 – Linked Data Tooling & State of the Art (35 min)

  • (5) Welcome & Introduction by chair
  • (7+3) Wouter Beek (Triply) “Introduction EuroSDR sandbox for spatial linked data experiments”
  • (7+3) Elio Hbeich (CSTB): From Buildings to Cities : Multi-scale geospatial databases and rules
  • (7+3) Lexi Rowland (Kadaster): The possibilities of Self Service GIS with Linked Data tools.


Keynote Spatial Knowledge in Action by Marinos Kavouras, National Technical University of Athens (CV)

chair: Benedicte Bucher, University Gustave Eiffel, IGN, EuroSDR


Keynote Know, Know Where, KnowWhereGraph by Krzysztof Janowicz, University of California

chair: Rob Lemmens, University of Twente


Closing Session