Satellite navigation receiver with map graphics and hypertext driven by a PDF database

摘要

An improved GPS navigation receiver for converting range and range-rate information from microwave radio transmissions from orbiting satellites and for determining a position of the receiver from a processing of the information and an output connected to provide the determined position on a display. The improvement comprises a database of maps stored in a portable document format (PDF) file independent of any hardware, software and operating system used to create it. The PDF file provides for a description of documents including any combination of text, graphics and images in a device-independent and resolution-independent format. The database is connected to output selected ones of the maps on the display with hypertext access on points-of-interest.