(A truer, more detailed -- annotated? -- graphic image of it is here.)
The pic below (and this) is what it looks like in situ. Hmmm. Time for a field trip to Italy?
Rock Art in the Alps - Valcamonica
. Rock Drawings in Valcamonica
. The new history of cartography, UNESCO Courier, June, 1991 by J.B. Harley
. Cartocacoethes: Why the World’s Oldest Map Isn’t a Map / October 13, 2008 by John Krygier
YET MORE, these are COOL map sites:
. Map of the Week