"The slope will be 74° at ground level." "Okay, I think we can hack together a ... wait, why did they specify ground level? It's 74° everywhere, right? ... Oh no, there's a whole section in the treaty labeled 'curvature.'"
FIE. FIE ON YOU ALL! (also, you'd just get your own spatial reference system and the horrible mess of EPSG:4326 would just approximate it anyways...) Huh. Today I learned about https://spatialreference.org/ref/epsg/4979/ ... which is 4326 but with 3d. Giving us "Northing, Easting, and Upping". ... kay.