ERRONEOUS ROUTE CONVERSION DETERMINATION APPARATUS AND ERRONEOUS ROUTE CONVERSION DETERMINATION METHOD FOR ERRONEOUS ROUTE CONVERSION DETERMINATION APPARATUS

Provided is an erroneous route conversion determination apparatus that determines presence or absence of erroneous route conversion when a set route on a navigation map for a navigation system of a vehicle is converted into a practical route on a high-precision map, in which position information of intersections on the set route and heading angles at the intersections of the set route are extracted based on the navigation map and the set route, position information of intersections on the practical route and heading angles at the intersections on the practical route are extracted based on the high-precision map and the practical route, and the presence or absence of the erroneous route conversion is determined based on a heading angle of the set route and a heading angle of the practical route at a common intersection that is an intersection common between the set route and the practical route.