초록 ▼

A combination of a GPS receiver for determining a user\s position in terms of latitude and longitude, a database that indexes approximately 53,000 USGS 7.5 minute series topographical quadrangle maps by the latitude and longitude of at least one point on each map, and an interpreter and display that

A combination of a GPS receiver for determining a user\s position in terms of latitude and longitude, a database that indexes approximately 53,000 USGS 7.5 minute series topographical quadrangle maps by the latitude and longitude of at least one point on each map, and an interpreter and display that communicates the particular USGS map that represents the user\s position together with the ruler dimensions left/right/up/down from a reference point on that map which pinpoints the user\s position on the map. The database is stored in the permanent memory of the GPS receiver and the interpreter and display are controller by a microcomputer included in the GPS receiver. The reference points include sixteen intersections on the map of 2.5 minute intervals of latitude and longitude contained in each 7.5 minute series quadrangle.

대표청구항 ▼

A satellite navigation map reading system, comprising: a navigation satellite receiver for receiving microwave radio transmission signals from orbiting global positioning system (GPS) satellites and for converting a plurality of said signals into a determination of an earth position of the receiver

A satellite navigation map reading system, comprising: a navigation satellite receiver for receiving microwave radio transmission signals from orbiting global positioning system (GPS) satellites and for converting a plurality of said signals into a determination of an earth position of the receiver and including means for computing said earth coordinate positions in terms of latitude and longitude; a database of unique map names and each map\s relation to a map coordinate earth position which is represented on a published, printed map and that is identified by one of said map names, and a scale of said published, printed map, wherein, the database includes the names, scales and included latitude and longitude reference points for the 7.5 minute series topographical maps published by the United States Geological Survey (USGS); interpretation means connected to the navigation satellite receiver and the database for converting said determination of an earth position of the receiver into one of said map names by indexing the database to find which of said published, printed maps includes a coordinate of said determined earth position of the receiver; a display connected to the interpretation means for visually communicating the unique identity of said one said published, printed map; and ruler measurement means connected to the interpretation means and the display for indicating to a user a ruler distance on a sheet of said published, printed map that said earth position of the receiver is represented up or down, then left or right from a reference point on said published, printed map.