Lu Li

Following the release of v0.6.0 https://github.com/fatiando/harmonica/issues/386, we are able to run upward continuation[see example](https://www.fatiando.org/harmonica/latest/user_guide/transformations.html). I'll close this one as well 😎

> Now I'm curious: what was the trick? Isn't an option in Oasis to just change the ordering? > > > Haha, Oasis doesn't have a function to change order....

Looks great! 👍 Just noticed a Python package on the NOAA website https://www.ngdc.noaa.gov/IAGA/vmod/pyIGRF.zip I think pack the coefficient will be very reasonable, which makes life easier without the internet. It...

Well done! 👍 We can start with the extract of the "wellknown_epsg=26921", similar like the `def extract_proj_str(fname)` https://github.com/markjessell/grd_loader/blob/main/geosoft_grid_parser.py. If that exists, we can read that. If not, we can ask...