What is the oldest known example of a detailed route map used by ancient travelers, and where was it discovered?

The oldest known example of a detailed route map is the “Tabula Rogeriana,” created by the Arab geographer Muhammad al-Idrisi in 1154 CE. However, an earlier example is the “Ptolemaic Maps” from around the 2nd century CE, used by Claudius Ptolemy. These maps were crucial for navigation and travel. Ptolemaic maps were known through manuscripts and later discoveries, notably through various historical sources rather than a single discovery.