2,2:1 Vapincum

This emendation, proposed by Miller 136 and Talbert 802, is dictated by the realities on the ground, where Alpine peaks constrict the road to certain valleys and passes. While it is conceivable that the errors derive from the chart-maker having been misinformed, it is far likelier that the mistakes derive from a drafting or copying error. The only possible lay of the road is from Gerainas (seemingly a repetition of Geminas) to Vapincum (Gap). Talbert: "a natural, but careless, mistake (compare the horizontal continuation from Bibe, 1A4); hence the lack of information to accompany the continuation." Miller: "Die Zahl weist richtig auf Vapincum hin, während der Verbindungstrict nach Brigantione führt. Es ist zu bemerken, daß in der Photographie des Originals deutliche Korrekturen und eine Unsicherheit der Strichführung erkennbar sind."