Maps, text and diagrams gradually replace what ever it was they were meant to describe.
"Geographies," said the geographer, "are the books which, of all books, are most concerned with matters of consequence. They never become old-fashioned. It is very rarely that a mountain changes its position. It is very rarely that an ocean empties itself of its waters. We write of eternal things."
‘Le Petit Prince’
Antoine de Saint-Exupery