Max Level Achieved:
Level 1-5: Beginner
Level 6-10: Occasional Traveller
Level 11-15: Map Enthusiast
Level 16-20: Globe-Trotter
Level 21-30: Probably a Cartographer
Level 31 & Up: PhD in Geography
Source code for this map is on GitHub.
It was designed and built by Jeff Allen in 2017 (updated in 2022 at the School of Cities) using Mapbox and QGIS, with data from OpenStreetMap and Natural Earth.