International Business Machines Corporation
Navigation using a device without global positioning system assistance

Abstract:

A navigation method that includes building a virtual map database of maps for structures that block GPS signals, wherein the virtual maps are created from speed and direction measurements taken from motion sensors of the mobile devices of users of a geographic information system (GIS) map server; and starting a navigation session by a user employing a navigation application that employs the GIS map server. The GIS map server includes GIS map data, and virtual map data from the virtual map database. The virtual map data is for navigation instructions without a GPS signal. A start location is set using the GIS map data to provide the initial start location; and directions are provided to the start location using a virtual map data from the virtual map database.