---
_id: '54616'
author:
- first_name: Alexander
  full_name: Becker, Alexander
  last_name: Becker
- first_name: Abdullah Fathi Ahmed
  full_name: Ahmed, Abdullah Fathi Ahmed
  id: '29670'
  last_name: Ahmed
- first_name: Mohamed
  full_name: Sherif, Mohamed
  id: '67234'
  last_name: Sherif
  orcid: https://orcid.org/0000-0002-9927-2203
- first_name: Axel-Cyrille
  full_name: Ngonga Ngomo, Axel-Cyrille
  id: '65716'
  last_name: Ngonga Ngomo
citation:
  ama: 'Becker A, Ahmed AFA, Sherif M, Ngonga Ngomo A-C. COBALT: A Content-Based Similarity
    Approach for Link Discovery over Geospatial Knowledge Graphs. In: <i>SEMANTiCS</i>.
    ; 2023.'
  apa: 'Becker, A., Ahmed, A. F. A., Sherif, M., &#38; Ngonga Ngomo, A.-C. (2023).
    COBALT: A Content-Based Similarity Approach for Link Discovery over Geospatial
    Knowledge Graphs. <i>SEMANTiCS</i>.'
  bibtex: '@inproceedings{Becker_Ahmed_Sherif_Ngonga Ngomo_2023, title={COBALT: A
    Content-Based Similarity Approach for Link Discovery over Geospatial Knowledge
    Graphs}, booktitle={SEMANTiCS}, author={Becker, Alexander and Ahmed, Abdullah
    Fathi Ahmed and Sherif, Mohamed and Ngonga Ngomo, Axel-Cyrille}, year={2023} }'
  chicago: 'Becker, Alexander, Abdullah Fathi Ahmed Ahmed, Mohamed Sherif, and Axel-Cyrille
    Ngonga Ngomo. “COBALT: A Content-Based Similarity Approach for Link Discovery
    over Geospatial Knowledge Graphs.” In <i>SEMANTiCS</i>, 2023.'
  ieee: 'A. Becker, A. F. A. Ahmed, M. Sherif, and A.-C. Ngonga Ngomo, “COBALT: A
    Content-Based Similarity Approach for Link Discovery over Geospatial Knowledge
    Graphs,” 2023.'
  mla: 'Becker, Alexander, et al. “COBALT: A Content-Based Similarity Approach for
    Link Discovery over Geospatial Knowledge Graphs.” <i>SEMANTiCS</i>, 2023.'
  short: 'A. Becker, A.F.A. Ahmed, M. Sherif, A.-C. Ngonga Ngomo, in: SEMANTiCS, 2023.'
date_created: 2024-06-04T15:59:28Z
date_updated: 2024-06-04T15:59:50Z
department:
- _id: '574'
keyword:
- ahmed becker dice ngonga sail sherif
language:
- iso: eng
publication: SEMANTiCS
status: public
title: 'COBALT: A Content-Based Similarity Approach for Link Discovery over Geospatial
  Knowledge Graphs'
type: conference
user_id: '67199'
year: '2023'
...
---
_id: '46514'
abstract:
- lang: eng
  text: "Purpose: Data integration and applications across knowledge graphs (KGs)
    rely heavily on the discovery of links between resources within these KGs. Geospatial
    link discovery algorithms have to deal with millions of point sets containing
    billions of points. \r\nMethodology: To speed up the discovery of geospatial links,
    we propose COBALT. COBALT combines the content measures with R-tree indexing.
    The content measures are based on the area, diagonal and distance of the minimum
    bounding boxes of the polygons which speeds up the process but is not perfectly
    accurate. We thus propose two polygon splitting approaches for improving the accuracy
    of COBALT. \r\nFindings: Our experiments on real-world datasets show that COBALT
    is able to speed up the topological relation discovery over geospatial KGs by
    up to 1.47 × 104 times over state-of-the-art linking algorithms while maintaining
    an F-Measure between 0.7 and 0.9 depending on the relation. Furthermore, we were
    able to achieve an F-Measure of up to 0.99 by applying our polygon splitting approaches
    before applying the content measures. \r\nValue: The process of discovering links
    between geospatial resources can be significantly faster by sacrificing the optimality
    of the results. This is especially important for real time data-driven applications
    such as emergency response, location-based services and traffic management. In
    future work, additional measures, like the location of polygons or the name of
    the entity represented by the polygon, could be integrated to further improve
    the accuracy of the results."
author:
- first_name: Alexander
  full_name: Becker, Alexander
  last_name: Becker
- first_name: Abdullah Fathi Ahmed
  full_name: Ahmed, Abdullah Fathi Ahmed
  id: '29670'
  last_name: Ahmed
- first_name: Mohamed
  full_name: Sherif, Mohamed
  id: '67234'
  last_name: Sherif
  orcid: https://orcid.org/0000-0002-9927-2203
- first_name: Axel-Cyrille
  full_name: Ngonga Ngomo, Axel-Cyrille
  id: '65716'
  last_name: Ngonga Ngomo
citation:
  ama: 'Becker A, Ahmed AFA, Sherif M, Ngonga Ngomo A-C. COBALT: A Content-Based Similarity
    Approach for Link Discovery over Geospatial Knowledge Graphs. In: <i>SEMANTiCS</i>.
    ; 2023.'
  apa: 'Becker, A., Ahmed, A. F. A., Sherif, M., &#38; Ngonga Ngomo, A.-C. (2023).
    COBALT: A Content-Based Similarity Approach for Link Discovery over Geospatial
    Knowledge Graphs. <i>SEMANTiCS</i>. SEMANTiCS 2023, Leipzig, Germany.'
  bibtex: '@inproceedings{Becker_Ahmed_Sherif_Ngonga Ngomo_2023, title={COBALT: A
    Content-Based Similarity Approach for Link Discovery over Geospatial Knowledge
    Graphs}, booktitle={SEMANTiCS}, author={Becker, Alexander and Ahmed, Abdullah
    Fathi Ahmed and Sherif, Mohamed and Ngonga Ngomo, Axel-Cyrille}, year={2023} }'
  chicago: 'Becker, Alexander, Abdullah Fathi Ahmed Ahmed, Mohamed Sherif, and Axel-Cyrille
    Ngonga Ngomo. “COBALT: A Content-Based Similarity Approach for Link Discovery
    over Geospatial Knowledge Graphs.” In <i>SEMANTiCS</i>, 2023.'
  ieee: 'A. Becker, A. F. A. Ahmed, M. Sherif, and A.-C. Ngonga Ngomo, “COBALT: A
    Content-Based Similarity Approach for Link Discovery over Geospatial Knowledge
    Graphs,” presented at the SEMANTiCS 2023, Leipzig, Germany, 2023.'
  mla: 'Becker, Alexander, et al. “COBALT: A Content-Based Similarity Approach for
    Link Discovery over Geospatial Knowledge Graphs.” <i>SEMANTiCS</i>, 2023.'
  short: 'A. Becker, A.F.A. Ahmed, M. Sherif, A.-C. Ngonga Ngomo, in: SEMANTiCS, 2023.'
conference:
  end_date: 2023-09-23
  location: Leipzig, Germany
  name: SEMANTiCS 2023
  start_date: 2023-09-20
date_created: 2023-08-16T08:55:23Z
date_updated: 2023-08-16T09:04:20Z
keyword:
- ahmed becker dice ngonga sail sherif
language:
- iso: eng
publication: SEMANTiCS
status: public
title: 'COBALT: A Content-Based Similarity Approach for Link Discovery over Geospatial
  Knowledge Graphs'
type: conference
user_id: '67234'
year: '2023'
...