In the mostly abstract open air (i.e. surrounded by the landscape )Atlantic tradition of Neolithic /B.A. rock art the only reasonble claims for a landscape depiction are the Bedolina "map " from Valcamonica . Although it may be much later ,i.e 1000-500 B.C. and not necessarilly a depiction of the landscape as it was . Nothing convincing of the heavens either , although Orion's belt and the Pleiades are often "seen " when a slightly squint group of three cup marks or six/seven in a clump are abstracted .Recent claims for constellations and a map of the moon are outlandish in more ways than one .
When the markings are iconic they are usually of humans , animals , equipment and weapons .
Good question .