Someone did in the mean time: https://github.com/pqoqubbw/icons/issues/4

Yeah, and Wikipedia, linux,… have become important as well, without big corpo

All of you are invited on !openstreetmap@lemmy.ml

Also checkout the many editing tools, such as https://mapcomplete.org, https://streetcomplete.app,…

Because the northern hemisphere is mostly land mass and the southern hemisphere is mostly ocean. Land heats faster and cools faster than ocean, thus the seasonal effects are more pronounced in the data.

Same with CO2 patterns which gives a similar yearly ‘breathing effect’