Sadly less than or equal to 2d, there, although it did lead me to Tobler's law: https://en.wikipedia.org/wiki/Tobler%27s_second_law_of_geography https://en.wik

Sadly less than or equal to 2d, there, although it did lead me to Tobler's law: https://en.wikipedia.org/wiki/Tobler%27s_second_law_of_geography https://en.wikipedia.org/wiki/Tobler%27s_second_law_of_geogr...