Before revision: upright=1.25|Image of Petrus Vesconte A rhumbline network (or windrose network) is a navigational aid consisting in multiple lines drawn on portolan charts in a web-like grid .
After revision: upright=1.25|Image of Petrus Vesconte A rhumbline network (or windrose network) is a navigational aid consisting in multiple lines drawn on portolan charts (and other early maps) in a web-like grid .