A public repository to organise maps for the #30DayMapChallenge under the umbrella of OSGeo:UK.
The 30DayMapChallenge is a daily mapping challenge open to everyone. Every November, participants create one map a day for 30 days, each based on a different theme, and share them on social media using the hashtag #30DayMapChallenge.
- Maps can be prepared in advance, but the spirit of the challenge is to publish one on each themed day.
- Post your map to Bluesky, Mastodon, LinkedIn, Instagram, X or any platform you prefer with the hashtag. No sign-up is needed.
- There are no restrictions on the tools, data or technologies you use, and fewer than 30 maps is also fine.
- For data sources, software and tutorials, see the official Mapping resources page.
- Get inspired by the community map collections and themes from past challenges.
Each daily theme has its own GitHub issue, labelled by year.
- Pick a day and comment on its issue with ideas, data sources and approaches.
- Assign yourself if you want to take the lead on a map, or join someone else's.
- Link or attach the finished map to the issue before publishing it on the themed day.
The 2026 challenge runs from 1 to 30 November. Themes and descriptions are from 30daymapchallenge.com.
| Day | Theme | Description |
|---|---|---|
| 1 | Points | A map challenge classic. Map with points. |
| 2 | Lines | A map challenge classic. Map with lines. |
| 3 | Polygons | A map challenge classic. Map with polygons. |
| 4 | Clusters | Clusters of something. Hotspots, groups, things that gather together. |
| 5 | Senses: Sight | How do you see something? Maybe map a viewshed? |
| 6 | Vintage | Spin up your time machine and do a map which looks like a historical map, or maybe the theme itself should be vintage. |
| 7 | 10 minute map | You have no more than 10 minutes to complete this map. |
| 8 | Utopia | A map of something which could be. |
| 9 | Urban-rural | Urban or rural. Cities and countryside. |
| 10 | Prompting only | For this map, make AI work for its money and produce something from start to finish in a chat window or on the command line. |
| 11 | Senses: Sound | How do you hear something? How do you map a soundscape? Noise pollution mapped? |
| 12 | Power | Power as in nuclear power? Or physical power or influence? Power grid on a map? Read this the way you want, like every other prompt. |
| 13 | Interactions | Interactions between things, or maybe the result would be an interactive map? |
| 14 | Borgesian map | A map so detailed it becomes the territory. Inspired by Borges' On Exactitude in Science. |
| 15 | Inside out | Inside out, upside down. Something on this map is not quite right. |
| 16 | Collaborative map | Do a map with a friend, colleague or a stranger. AI doesn't count as a friend :) |
| 17 | Light & dark | Play with visual effects. What can you map with just light and shadows? |
| 18 | NULL | |
| 19 | Senses: Smell | How do you map things which your nose can sense? What does a smelly map look like? |
| 20 | Hexagons | Hexagons, the good old bestagons. |
| 21 | OpenStreetMap | The awesome data source for mapping. You can also use this day to edit OSM. |
| 22 | Projections | The different ways of representing a globe on a flat surface. What does your favourite map projection say about you? |
| 23 | Senses: Taste | Food, drink or something else which you can taste. |
| 24 | Network | Route network, transit network, human network or something completely different. |
| 25 | Is this a map? | Stretch the limits of maps and blend your map with an artwork or some creative data visualization. When does something become a map and when does it stop being one? |
| 26 | Water | About 71% of the Earth's surface. That wet thing, you know? |
| 27 | New tool | The challenge has always been about learning things. Try out a new tool in your mapmaking workflow. |
| 28 | Senses: Feeling | The most abstract of the senses series. How would you map a feeling? |
| 29 | Raster | Do something cool with pixels. |
| 30 | Pen & paper | Time to wrap up the challenge by closing your laptop for a while and going back to basics. Do an analogue map with pen and paper. |
Everyone is welcome, whether you are a GIS expert or have never made a map before. Please follow the challenge's Code of Conduct:
- All maps you publish have to be your original work.
- Give credit to the original data source whenever possible.
- The challenge is about creativity, openness and the joy of beautiful maps and cartography. It is not a competition.
- Be smart with AI tools, and be open about how you made your map. Day 10 (Prompting only) is the exception for prompt-only maps.
- Don't harass or steal from others.
- Official website: 30daymapchallenge.com
- Website source: tjukanovt/30DayMapChallenge
- Follow the hashtag on Bluesky, Mastodon, LinkedIn and Instagram