Front-end cartographer. Research Engineer in Geographic Information Science at CNRS & UAR RIATE. Author of Mad Maps (2019), Practical Handbook of Thematic Cartography (2016, 2020, 2025) and Cartographia (2025).
I think there is a problem with this geojson, when you look at the Canada/US border. Probably because it's not resampled along the parallel. Other than that it looks very nicely generalized.