Patent ID: 6452544
Filing Date: 2002-09-17
Classification: G01C,G09B

Abstract:
A portable map display system comprising:a) a portable map display device comprising: i) a display unit; ii) a self-locator unit for detecting a location of the portable map display device; iii) a direction detector unit for detecting a direction the portable map display device is facing; iv) a map data client for requesting map data concerning an area in a vicinity of the portable map display device, said map data request including the detected location of the portable map display device and the detected direction of the portable map display device; v) a receiver unit for receiving the requested map data; and vi) a data processor for processing the received map data for transmitting to the display unit and causing the display unit to present to a user a three dimensional image of the vicinity of the location of the portable map display device with spatial perspective from the detected direction the portable map display device is facing; and b) a map data server for receiving the map data request, for retrieving the requested map data using the detected location and the detected direction, and for sending the requested map data to the receiver unit of the portable map display device.