What would a cartographer's notes be like?

[sarawinter]

Im thinking in the same line as Falconius.
I imgaine the map would have symbols that the artist didn´t understand, perhaps he turned them into ornaments. There would be multiple corrections, again something the artist might have misinterpreted. When copying other peoples work it is very tempting to "correct" something, so that it adheres to your logic. When it comes to measuring things, there is a great selection of obsolete units here, https://en.wikipedia.org/wiki/List_o...of_measurement Perhaps he figured out a way to measure depth of caverns by using echoes or something similar.
Øystein

Thanks so much for the list!

I was also thinking of some sort of echo-tool to capture the dimensions of the spaces... That should not be too far-fetched for dwarves to have invented.