This text, part of the #ODDStories series, tells a story of Open Data Day‘s grassroots impact directly from the community’s voices.
On March 7, 2025, GeoTE-Tanzania successfully hosted the SMCoSE Geochallenge 2025: Map Roulette Edition, a dynamic event that brought together students, researchers, local communities, and mapping enthusiasts to celebrate Open Data Day. This initiative focused on enhancing accessibility and disaster resilience in Tanzania by improving road data on OpenStreetMap (OSM) using Map Roulette, a powerful micro-tasking tool for mapping.
Addressing the Challenges of Accessibility
Tanzania, like many other developing regions, faces significant accessibility challenges, particularly in remote areas where road infrastructure is poorly mapped. Accurate and updated maps play a crucial role in emergency response, healthcare access, and disaster resilience. By engaging participants in mapping activities, this event improved the quality of open data, supporting informed decision-making for health services and crisis management.
A Hands-On Experience with Map Roulette
The event featured an introduction to Map Roulette, where participants learned how to use the platform to identify and correct missing or inaccurate road data. Through a collaborative mapping challenge, attendees worked on designated tasks to improve road networks, ensuring a more reliable and efficient transportation system. In addition, experts and community leaders facilitated discussions on how open data enhances disaster preparedness and health services, reinforcing the importance of community-driven mapping initiatives.
Impact and Key Outcomes
The impact of the SMCoSE Geochallenge 2025 was profound, with 68 participants actively contributing to updating road data. The initiative led to improved road mapping for healthcare accessibility and disaster response, strengthening Tanzania’s open data and mapping community. Beyond the immediate outcomes, the event set the foundation for sustained engagement in mapping activities, ensuring long-term benefits for local communities. The participants completed the mapping challenges by 100% of the mapping project.
Challenge winners and sustaining the Momentum
The success of this event is just the beginning. Moving forward, we will continue to engage participants through follow-up Map Roulette challenges, mentorship programs, and local mapping initiatives. Our goal is to maintain and expand the impact of open data, empowering communities to take an active role in shaping their environments through mapping. We had three top winners and Top Ten winners for the Geochallenge who were awarded to appreciate their commitment to open data.
Celebrating Women’s Contribution to Mapping
As we celebrated Open data day on 7th March, we also highlighted the contribution of Women ahead of the International Women’s Day celebrations. This event also recognized and celebrated the role of women in mapping and geospatial technology. Women have been at the forefront of mapping initiatives, contributing significantly to shaping the future of open data. Their participation in mapping has transformed lives in Tanzania by improving road data, enhancing accessibility, and supporting emergency response systems. This acknowledgment reinforces the importance of inclusivity and gender equity.
Conclusion
This event was more than just a mapping challenge; it was a powerful demonstration of how open data and community collaboration can address real-world problems. It ignited a passion for mapping among students, inspiring them to continue contributing to OpenStreetMap and advocating for open data in their communities. The event not only improved road data in Tanzania but also fostered a strong sense of community and empowered individuals to become agents of change. Moving forward, we aim to build on this momentum, expanding our mapping initiatives and further integrating open data into decision-making processes.
As we celebrate Open Data Day 2025, let us continue to harness the power of open data for positive change. Together, we can create a more resilient, accessible, and equitable world through the transformative power of geospatial technology and community-driven mapping.
About Open Data Day
Open Data Day (ODD) is an annual celebration of open data all over the world. Groups from many countries create local events on the day where they will use open data in their communities. ODD is led by the Open Knowledge Foundation (OKFN) and the Open Knowledge Network.
As a way to increase the representation of different cultures, since 2023 we offer the opportunity for organisations to host an Open Data Day event on the best date over one week. In 2025, a total of 189 events happened all over the world between March 1st and 7th, in 57 countries using 15+ different languages. All outputs are open for everyone to use and re-use.
For more information, you can reach out to the Open Knowledge Foundation team by emailing opendataday@okfn.org. You can also join the Open Data Day Google Group or join the Open Data Day Slack channel to ask for advice, share tips and get connected with others.
