Chaos Computer Club - recent events feed

This session will present the latest updates from the Foundation itself, and the progress it has made in standing on its own legs during the last year. Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2025.matrix.org/matrix-conf-2025/talk/3RXLTQ/

Welcome Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://cfp.2025.matrix.org/matrix-conf-2025/talk/CL3HJB/

Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://c3voc.de

Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://c3voc.de

Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://c3voc.de

Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://c3voc.de

Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://c3voc.de

Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://c3voc.de

Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://c3voc.de

Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://c3voc.de

Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://c3voc.de

Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://c3voc.de

Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://c3voc.de

Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://c3voc.de

Projekte: GlowPaka, Potato C4, Wanderalpakas, Sicher durch die Nacht, StatisTok, Servo-Gurt, Minecraft Shader, Wallet Finder, Safe Media, Anti-Stress Kuscheltier, Alpaka.Connect, Aquaponik Licensed to the public under https://creativecommons.org/licenses/by-sa/4.0/ about this event: https://c3voc.de

During the OpenStreetMap Foundation Board Ask Us Anything (i.e. AMA) session, we will take questions from the audience oand/or more questions that the larger community can submit before the event. We can discuss the board's past actions and our future plans. Let’s have a conversation about the Foundation and the Board and how all the parts work together. If you know nothing about what the board is doing, this is a chance to find out. Find out what the Foundation does and doesn’t do, what it can and can’t do. Find out how you can help and get involved. The Board is committed to openness and wants to engage with the community. Feel free to ask us questions also outside this specific session. Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/ about this event: https://2025.stateofthemap.org/sessions/ECRTL9/

What could you really accomplish with 100 days of consistent mapping? Add 1000 buildings, delete 100 nodes, or achieve completeness for an entire neighbourhood? Within the OpenStreetMap community, mappers contribute at different levels and frequencies using several tools and editors to enhance the map. In this presentation, we will share our experiences mapping every single day - the lessons learnt, the shortcuts we somehow didn't know, and key insights on maintaining data quality while sustaining a daily mapping practice over an extended period. We'll explore frameworks that could be considered for similar mapping challenges, strategies for finding motivation when inspiration runs low, and tracking progress to celebrate mapping milestones along the way. Since February, I've implemented a daily OpenStreetMap contribution practice(inspired by community members in Tanzania who mapped daily in 2024!). This systematic approach to consistent mapping has provided valuable insights into both the technical and motivational aspects of sustained OSM engagement. In this presentation, I will share my experiences mapping daily, examining how regular, incremental contributions can develop into meaningful map improvements over time. I'll discuss the variety of mapping tasks undertaken, the challenges encountered, and the quantifiable progression in mapping efficiency and quality. The session will outline practical considerations for those interested in adopting a similar mapping routine, including time allocation strategies, approaches to maintaining engagement during challenging periods, and methods for evaluating contribution impact. The presentation will address how both brief daily sessions and more extended mapping periods can be effectively integrated into a sustainable practice. This talk aims to present a structured framework for consistent OSM participation that attendees can adapt to their specific contexts, potentially enhancing both individual mapping capabilities and collective contributions to the OpenStreetMap project. Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/ about this event: https://2025.stateofthemap.org/sessions/3WWGYS/

Access to safe water and sanitation is critical for public health and sustainable urban development, yet significant disparities persist in informal settlements across low- and middle-income countries. This study explores inequalities in WASH access within Korogocho and Viwandani which are two densely populated informal settlements in Nairobi, using a participatory geospatial approach. Community members collaborated in mapping key WASH-related assets, including water points, sanitation facilities, and waste collection sites, enabling a detailed spatial understanding often absent in official datasets. A three-stage methodology was applied: participatory asset mapping, field validation using SurveyCTO , and data digitization and uploading onto OpenStreetMap. The process not only improved data quality but also empowered and built capacity of local residents through engagement in data collection and urban planning discussions. Results revealed critical service gaps, facility unreliability, and infrastructure needs, particularly during droughts. Despite Nairobi’s reported high access levels to improved water (96.4%), this figure masks deep inequalities within its informal settlements. By identifying priority areas and visualizing spatial inequalities, participatory GIS offers a scalable model for inclusive planning and equitable WASH interventions. This research underscores the role of community-driven mapping in fostering sustainable urban resilience and informing policy for underserved populations. This study employed a participatory three-stage approach to assess water access in informal settlements, focusing on mapping, data collection, and open-data sharing through OpenStreetMap (OSM). The first stage involved community participatory mapping, where local residents and leaders identified water access points, sanitation facilities, and waste collection areas, including piped connections, boreholes, and kiosks. This inclusive process addressed gaps in conventional mapping methods by capturing both official and community-used facilities. Focus group discussions provided further insights into the reliability, cost, and accessibility of these services, and the data was digitized using QGIS for spatial analysis. In the second stage, trained community members conducted field validation using SurveyCTO, a GPS-enabled mobile platform, to gather georeferenced water access data. A rigorous cleaning and validation process enhanced the dataset's reliability by cross-checking with previous spatial datasets. Finally, the dataset was uploaded to OSM, making it publicly accessible for planners, researchers, and decision-makers. A group of community members were involved through all the different stages and trained on how to use the different tools as required. This open-data initiative supports evidence-based urban water planning, enabling stakeholders to prioritize infrastructure and policy interventions in underserved areas, fostering equitable development and improved water access for vulnerable populations. Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/ about this event: https://2025.stateofthemap.org/sessions/XXHWYH/

In this talk I will describe the pros and cons of using the pmtiles vector tile format in comparison with other tile formats. I will then talk about some of the tools available to generate pmtiles tiles based on OSM data and other GIS formats, inspect these tiles and visualize them on a website. Finally, I will demonstrate how I built in the real world a data pipeline to filter and transform OSM data, combine it with other data from external sources, generate pmtiles using the tools previously described and implement a website to display the generated tiles on a map. Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/ about this event: https://2025.stateofthemap.org/sessions/UUTQZX/

## Building Resilience Spales through Open Mapping _by Jannie Fleur V. Oraño_ ## Mapping pet-friendly spaces in OSM _by Leigh Lunas_ ## Geo Drawing _by Moe Anjo, Mia Kozaki, Rensei Inoue, Yudai Kato_ ## OSM vs. Field Practical Training _by Erick Tamba Mnyali_ ## World's best addressing system _Dan Jacobson_ ## Invitation to FOSS4G 2026 in Hiroshima _by Satoshi Tanaka_ Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/ about this event: https://2025.stateofthemap.org/sessions/N79KTE/

Unlike most world maps, OpenStreetMap is built by a global community with a keen focus on local knowledge. For many local communities, proper representation of the native language is just as important as getting the locations right. OpenHistoricalMap extends this approach back in time, incidentally tracking the evolution of written language through toponyms. Increasingly, users experience both projects through vector maps, which cannot necessarily benefit from the techniques that enable broad language support in raster maps. In particular, many Asian writing systems present unique implementation challenges for both cartographers and renderer developers. This talk traces the history of writing system support in one popular vector map library, MapLibre, from its origins in Mapbox GL to more recent experiments in improving text layout and rendering. As vector map technology finds its way onto the OSM homepage, these improvements will take on added urgency. You’ll learn about some mapping practices that renderer developers must work around, as well as limitations in underlying technologies like JavaScript and Unicode that block more comprehensive language coverage. You’ll come away with a fuller appreciation for the role of text rendering technology on the Web in the promotion of linguistic heritage. Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/ about this event: https://2025.stateofthemap.org/sessions/CTPAV7/

The Open Mapping Gurus are more than skilled mappers—they are changemakers rooted in their local contexts, driven by purpose, and committed to building resilient communities through open data. As mapping needs shift from short-term project engagement to long-term sustainability and impact, we need to equip these local champions not just with tools—but with vision, leadership, and strategy. This workshop explores how Open Mapping Gurus can play a central role in implementing and co-owning regional and national community-building strategies. Drawing from the Asia-Pacific Open Mapping Hub’s 2025–2030 Community Building Strategy, this session will present pathways for local leadership, inclusive participation, and cross-border collaboration. Participants will unpack the strategy’s key objectives—such as strengthening grassroots mapping, integrating community-centered monitoring and evaluation (MEL), and scaling open mapping through partnerships—and localize these goals through the lens of their own communities. Using interactive frameworks, reflection tools, and real-world examples, the workshop will help Gurus: 1) Identify their unique leadership role and local impact potential 2) Map opportunities for growing their local communities or projects 3) Align their ongoing work with regional strategy goals 4) Collaborate with other Gurus and partners to solve shared challenges By the end of this session, Gurus will leave with a clearer roadmap of how their grassroots work fits into a broader open mapping movement—where their contributions are seen, supported, and celebrated. This is not just a workshop; it's an invitation to step more confidently into your leadership role within the open mapping ecosystem. This interactive workshop is designed for Open Mapping Gurus and emerging local leaders who are ready to take their community mapping efforts to the next level. While many have contributed to mapping projects that support disaster response, health access, and development goals, sustaining this work—and the communities behind it—requires more than just mapping skills. It requires a strategic approach to community building, collaboration, and leadership. Drawing from the Asia-Pacific Open Mapping Hub’s 2025–2030 Community Building Strategy, this session aims to connect the dots between individual efforts and the larger open mapping movement across the region. Participants will learn how to align their local initiatives with regional objectives focused on grassroots leadership, inclusive participation, capacity strengthening, and cross-border collaboration. Using hands-on activities, small group work, and guided reflection, Gurus will identify their strengths, share their challenges, and create personal roadmaps that link their goals to regional priorities. The session will also spotlight successful community initiatives from across the Asia-Pacific region to inspire collaboration and knowledge exchange. This session is ideal for anyone who wants to grow from an individual contributor into a community leader, mentor, and changemaker within the open mapping movement. Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/ about this event: https://2025.stateofthemap.org/sessions/TFURNU/

On December 14, 2024, the territory of Mayotte, a French department of more than 300,000 inhabitants made up of several islands between Africa and Madagascar, was hit by the passage of Chido, the most violent cyclone it had seen in more than fifty years. Pleiades imagery taken in the following days, between December 17 and 24, were posted online and released for the OSM contribution. These images provided an opportunity to compare the situation before and after the disaster and to assess the damage to thousands of buildings. The presentation will explain the chosen methodology, which was inspired by the few examples previously produced in OSM and by a methodology developed by researchers at the Harvard Humanitarian Initiative. It will briefly show the editing workflow, which uses a specific preset and cartographic style in JOSM and relies on detailed descriptions and videos in several languages. It will also analyze the results obtained and the statistics generated throughout the cartographic process. It will compare them with other post-Chido evaluations carried out remotely or in the field, but on smaller samples. Finally, it will look at the prospects for replication in other contexts affected by wind damage. Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/ about this event: https://2025.stateofthemap.org/sessions/RMVQF9/

## Spatial Innovation in Carigara: Applying Opensource Mapping Tools for Community Development _by Ariel Donic_ ## Enhancing Passenger Ride Experience Using GrabMaps _by Vic Puno_ ## From OSM Data to Transport Models _by Yannick Roth_ ## What is a stop? Mapping Public Transport Routes _by Wilhansen Li_ Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/ about this event: https://2025.stateofthemap.org/sessions/YDSFTB/