Day 29: NULL – Polar Anomalies? Christian PrzybylekDecember 30, 2021#30DayMapChallenge2021, Antarctica, Polar, WeirdComment
Day 28: the Earth is not flat – Digital Globes Christian PrzybylekDecember 29, 2021#30DayMapChallenge2021, Globes, Flat EarthComment
Day 27: Heatmap – Mapping the World’s Ports Christian PrzybylekDecember 28, 2021#30DayMapChallenge2021, Heatmap, Ports, Natural EarthComment
