Team MapleByte for G20 Disaster Risk Reduction (DRR) Hackathon 2025
Hackathon Goals & Objectives
South Africa chaired the G20 group of countries, and hosted a G20 Open Innovation Demonstrator Project on Disaster Risk Reduction (DRR) in September 2025.
The hackathon "...forms part of one of the proposed deliverables for the G20 Research and Innovation Working Group (RIWG) in 2025, namely to implement a Demonstrator Project under the broader theme of Disaster Risk Reduction using Open Innovation (DRR-OI). The G20 DRR-OI initiative aims to harness digital technologies, shared data systems, and collaborative problem-solving to enhance global resilience to disasters, particularly in water-stressed and climate-vulnerable regions." (G20 Hackathon Organizer's Concept Note)
Team MapleByte, representing Canada
This is our team blog providing an overview of our hackathon results, and a log/deep dive of the issues and challenges we encountered. Our members:
- Benedicta Antwi Boasiako
- Heather McGrath
- Mikhail Sokolov
- Nicholas Kellett
- Yosef Gonzalez Samudio
Area of Interest
We selected an informal settlement centred on Quarry Road / N2 Interchange Umgeni in Durban, South Africa.
We used this as our baseline because an excellent article, "A Perfect Storm" published in the Outlier gave us great insight into the suffering and issues caused by a historic April 2022 flood.
We could therefore compare our research efforts and findings against this real world example, in the hopes that future refinements of our results might one day help people living in informal settlements and affected by flooding - like those near Quarry Road.
Workstreams
We divided the work up into parallel streams of activity, each led by a team member:
- 0: Overall Approach & Results
- 1: Settlement Detection (Mikhail)
- 2: Settlement Growth (Benedicta)
- 3: Flood Risk (Heather)
- 4: Stakeholder Policy, Awareness & Outreach (Yosef)
- 5: Team blog / websites (Nick)
Results
Below we show one of our results - a predicted flood extents during a future flood event and the potential risk to settlements in the area (now or in the future). We added callouts to make it easier to spot areas that could be potential flood risks under current and future settlement growth scenarios.
View our team's overall results.
What if we had more time...?.
Find our code on
With Thanks & Recognition
- The G20 DRR Hackathon organizers and volunteers for their tireless efforts to champion, promote, organize and run the hackathon.
- Digital Earth Africa for hosting the data, sandbox tools, and providing training and support on their platform
- The Science Policy Branch, Science and Research Sector of Innovation, Science and Economic Development Canada (ISED), and Public Safety Canada and Natural Resources Canada (NRCan) for providing team formation assistance and logistical support.
- Data providers including ESRI, ESA, OpenStreetMap, and NASA/USGS Landsat for providing data products and Jupyter Notebook and QGIS communities for their tools
- Writer Leonie Joubert with support from Laura Grant, Gemma Ritchie, Gemma Gatticchi, Alastair Otter, Ciaran Otter, Tanya Pampalone, and Internews' Earth Journalism Network for producing the article "A Perfect Storm" in the Outlier published on 1 May 2023.
- Open source contributors for their invaluable tools and libraries
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