Importance

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Abstract

An apparatus to enable one's position to be easily found on a traditional map having its own coordinate system distinct from a wide area coordinate system, data is associated with the map from which the relationship--between the map coordinate system and the wide area coordinate system can be determined. The apparatus has a reader for reading the data associated with the map, a memory for storing the read data, a GPS receiver for receiving transmissions from GPS satellites and determining the position of the GPS receiver in terms of the wide area coordinate system, a processor for processing the determined wide area coordinate position and the stored data to determine the position of the GPS receiver in terms of the map coordinate system, and a display or the like for annunciating to a user the determined map coordinate position. The data associated with the map preferably also includes information on the area covered by the map. The map may be one of a series of maps or part of an atlas, the data relating to all of the maps in the series or atlas.

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First Claim