In-vehicle device and route interpolation method therefor

摘要

The purpose of this invention is to interpolate discontinuity intervals using interpolated routes that are appropriate from a toll-collection standpoint. This in-vehicle device (1) is provided with a map-information storage unit (12) that stores map information in which roads are artificially segmented into multiple links and each link is associated with unique identifying information and location information and an interpolated-route-information storage unit (14) that stores interpolated-route information in which combinations of two discontinuous line segments and line segments constituting interpolated routes that join said line segments are uniquely defined. If two line segments successively identified by a link identification unit (13) are discontinuous within the map information, a movement-route creation unit (15) uses the abovementioned interpolated-route information to interpolate the discontinuity interval.