A some point, I will post a map showing the earliest account of Europeans (the Dutch) mapping a portion of Australia, which they thought was Guinea.
To your earlier point, I exhibit at the American Association of Geographers (AAG) conference. My booth is always slammed with people in the field of GIS that have never seen the old maps.
RE: The Earliest Map to Suggest the Existance of Australia by: Benito Arias, 1572