30DayMapChallenge2026

The #30DayMapChallenge is an event which gathers mappers on social media each November since 2019. The challenge is to produce a map for each of the 30 days of November, following the set of themes / topics / constraints set by the organisers.

This year again, we participate as a group to the #30DayMapChallenge. Given the focus of the Rbanism community on the programming language R, we create each map with R.

Guidelines for submission

1. Create the map you were assigned for, which contains:
   1. a map made with R,
   2. a title (on the format “*challengedate_challengetopic: subtitle”),
   3. a mention of the credits (with data source, mapper's name, #30DayMapChallenge) and
   4. the Rbanism logo whenever possible.

See an example here.

2. Create a folder whose title is “challengedate_challengetopic”, containing:
   1. the data whenever possible (as small as possible),
   2. R code,
   3. PNG of the map, and
   4. <200 words describing the content of the map & <200 words describing the process and what you learned.

See an example here.

3. Send the zipped folder to rbanism@tudelft.nl or 2) send a Pull Request on GitHub at least one day before the date of your topic.

Publication and sharing

If you want your author credits to be shared on our social media, please share your instagram/BlueSky handle with the submission! If via email, simply add it to the mail, if via GitHub, please add a .txt file within the folder.

Submissions will be featured on Rbanism social media and might also be included in other types of publications in the future, always with full author credit.

AI Use

One of the main purposes of this challenge is to learn and enhance our R coding and visualization skills. We would like to encourage you to write your own code and refrain from relying on AI-generated code ("vibe coding").

#30DayMapChallenge on social media

On BlueSky - The Challenge feed - @Rbanism

On Instagram - @Rbanism_

On LinkedIn - Rbanism

Resources

• Geospatial Data Carpentry for Urbanism provides a comprehensive guide on how you can work with raster and vector data in R.

Our logo

You can also find the logo files here:
Rbanism 30DayMapChallenge 2026 — Logo folder

Our colour Hex codes

Purple: #93278F Teal: #00A99D Orange: #F7931E

Any questions or ideas?

If there any ideas, questions, or uncertainties regarding the challenge, please don’t hesitate to reach out to us via rbanism@tudelft.nl !