introduction of the 24th ICA Workshop on map generalisation and multiple representation, which focused on benchmarks for map generalisation. The workshop took place on the 13th December 2021 in Florence, Italy.

1. Open science and benchmarks to
boost map generalisation research
Pia Bereuter, Paulo Raposo,
Guillaume Touya

2. Why do we need a benchmark?

3. Make map generalisation reproducible

4. Use cases for academic researchers

5. Compare methods more easily
[Meijers 2016]

6. Push important or new problems

7. Enroll new researchers

8. What is a benchmark for research?

9. Several benchmarks…

10. Paper and code made available

11. Evaluation measures

12. 1 dataset several benchmarks?

13. How do we publish a benchmark?

14. Paperswithcode.com

15. More simple approaches
https://github.com/VSainteuf/pastis-benchmark

16. Program of the workshop

17. • 9h15-10h Introduction to open science issues related to the commission, and examples
of existing benchmarks (by the commissions chairs)
• 10h-10h20 Coffee break
• 10h20-12h30 Presentation session (15’ presentation + 10’ questions)
• Karel Stanek, Petr Silhak and Aneta Ryglova. The benchmark set for slopes generalization
• Azelle Courtial, Guillaume Touya and Xiang Zhang. AlpineBends – A Benchmark for Deep
Learning-Based Generalisation
• Guillaume Touya. L’Alpe d’Huez: A Benchmark for Topographic Map Generalisation
• Guillaume Touya and Azelle Courtial. BasqueRoads: A Benchmark for Road Network Selection
• Barry Kronenfeld, Lawrence Stanislawski, Barbara Buttenfield and Ethan Shavers. Interactive
Procedure for Localized Monitoring and Control of Polyline Simplification
• 12h30-14h Lunch
• 14h-16h Group work sessions
• 16h-16h30 Coffee break
• 16h30-16h45 Conclusion of the workshop and presentation of the ICC sessions for the
commission

18. Group Work session
• Pick one of the presented benchmark and finalise it
• Or select a benchmark idea and build the agenda the create it
• Possible group paper to synthetise our discussions

19. Any question?

20. Wednesday, December 15 • 14:45 - 16:30 • Session T08-1
• Rebanker: Displacing Embankment Lines From Roads and Rivers With a Least Squares
Adjustment
Guillaume Touya, Imran Lokhat
• Supervised Learning for Automated Feature Selection in Road Network Generalization
Izabela Karsznia, Albert Adolf, Stefan Leyk
• Horizontal Accuracy Assessment of a Recent Algorithm for Approximate a Surface to a Dem
Juan Francisco Reinoso-Gordo, Domingo Barrera, María Ibáñez, Eddargani Salah, Rocío
Romero, Francisco Ariza-López
• Theoretical and Practical Application of Wang-Müller Line Generalisation Algorithm
Tomas Straupis, Motiejus Jakstys
• The Change and the Challenge of a National Geographic Database
Carlo Perugi

21. Wednesday, December 15 • 17:00 - 18:45 • Session T08-2
• Please, Help Me! I Am Lost in Zoom
Guillaume Touya, Maria-Jesus Lobo, William Mackaness, Ian Muehlenhaus
• Data Classification Methods for Preserving Spatial Patterns
Jochen Schiewe
• Modelling and Building of a Graph Database of Multi-Source Landmarks to Help Emergency
Mountain Rescuers
Véronique Gendner, Marie-Dominique Van Damme, Ana-Maria Olteanu-Raimond
• Deep Learning for Map Generalization: Towards a New Approach Using Vector Data
Martin Knura
• Can Graph Convolution Networks Learn Spatial Relations?
Azelle Courtial, Guillaume Touya, Xiang Zhang

22. Business Meeting of the commission
Wednesday, December 15 - 8:45-10:15 – Room Altana