The beauty of the ancient maps is that they contain precise details called "Diagnostic Geographical Markers." These "markers" serve the same function as fingerprints found at a crime scene. These cartographical fingerprints contain unmistakable coastlines, geographical positions on the globe, references of longitude and latitude, proximities to identifiable mainland or islands, place names of cities or territorial titles (also called toponyms), and often text that identifies key features of topography, climate, vegetation, or native species of animals.