Wiktionary
n. 1 A topographical map. 2 (context genetics English) A map showing how much DNA separates two genes, measured in base pairs, as opposed to a genetic map.
Usage examples of "physical map".
It was a very large scale map, a road map but also a physical map showing rivers and hills, and as he studied it his excitement mounted, and his mind went back fourteen years to the days when he had been the youngest subaltern in the S.
If we compare it with a physical map of the continent, it appears that the best places to look are along the banks of the Amazon proper, as well as near certain tributary rivers: the Rio Negro, Japura, Ica, Putumayo, Jurua, Madeira, and Tapajos.
As a glance at any physical map will show, coastlines are fairly arbitrary and can change beyond recognition with even minor variations in sea level.