Ground mapping method, ground mapping system, and program for ground mapping

摘要

A map display system according to the present invention includes: a search section searching for a reference point where a map has not changed for approximately the same period as a period during which a map or a landscape of a base point has not changed; and a display section displaying information which represents the searched reference point. Further, a map display method according to the present invention includes: searching for a reference point where a map has not changed for approximately the same period as a period during which a map or a landscape of a base point has not changed; and displaying information which represents the searched reference point.