Look folks - this is really simple.
Exactly 6,000 Years ago, the Creationistas say that we were made.
We were a bit confused, and so concentrated on our fingers and toes, and decided that base 10 could work.
We then discovered that the World was spherical-ish and created a flawed mapping system.
They saw that one could divide the oblate spheroid into segments, like the Oranges that they were enjoying when boiled with sugar and made into Marmalade.
Good result. It worked. But.
They didn't spot that Lines of Latitude might have been better replaced by choosing an East and West Pole and cutting the sphere into segments akin to those that Lines of Longitude do.
They would then have been able to work out the best way to eat a Grapefruit.
Notwithstanding this error, some bright spark realised that multiples of 12 offer more outcomes of subdivision than those of 10. Good point, and well made.
Then at some point (and I'd welcome some input from the Creationistas for an exact date) we noticed the stars and Sun/Moon/Planets, and made some notes. And with some sums worked a few things out so that we could guess our location.
A bit further along, Radio was created, (again, input welcomed) and some people (who turned not to be on our 'like' list) came up with "Ultrakurzwellen-Landefunkfeuer".
This was not good news.
But it was a turning point (sorry). Thereafter the electronic and radio based systems (with the exception of the simple RDF) relied on lines on maps for co-ordination which were entirely arbitrary. The 1980s gave us (civilians) electronics which would do their stuff and give us Lat/Long - but only thinking in 1/0s internally.
Today the gps system does not have a clue about units that we would use. They work out where we are and, in much the same way as we would say 'print' on some data, it stuffs it through the last bit of software to demonstrate some sort of recognisable position.
That, folks, is my take on the history of mapping.
Now if I could start.......