Exact geographic measurements where the high technology of 18th century. Each society uses the highest precision measurements available to them. Also, plate tec

Exact geographic measurements where the high technology of 18th century. Each society uses the highest precision measurements available to them. Also, plate tectonics were scifi fantasy until 1950's. The definition has been updated after that. https://en.wikipedia.org/wiki/2019_redefinition_of_the_SI_base_units https://en.wikipedia.org/wiki/2019_redefinition_of_the_SI_ba...