30DayMapChallenge is a collection of data, code, and visualizations created for the 30DayMapChallenge, an annual social media event where cartographers, data scientists, and map enthusiasts produce a new map each day in November based on a daily theme. This repository serves as a portfolio and resource hub containing the source data, processing scripts, and final map outputs used throughout the challenge. Each entry showcases different aspects of cartography and data visualization, often testing techniques in geographic information systems, programming languages like Python and R, and various mapping libraries. The project is useful for mapmakers seeking inspiration, learners studying practical examples of data-driven mapmaking, and anyone interested in how diverse themes can be translated into compelling geographic visualizations. An additional gallery of entries is available on the creator's personal website, providing visual context alongside the technical materials in the repository.