WALKER NAVIGATION SYSTEM, WALKER NAVIGATION METHOD, GUIDANCE DATA COLLECTION APPARATUS AND GUIDANCE DATA COLLECTION METHOD

A walker navigation apparatus, including an input designation device to input a departure location and destination; a road data storage unit to store road data; a supplemental data storage unit to store supplemental data representing at least one of stairs, an elevator, an escalator, a step, and a road width corresponding to the road data; a route generator to generate an optimum route by calculating a cost of a route from the departure location to the destination based on the road data and the supplement data; and an output device to visually output the optimum route.