Computer aided map location system
July 18, 2017. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesRoad map display system with indications of a vehicle position and destination Map display system Vehicle navigational apparatus for displaying a road map Method for accurately displaying positional information on a map Navigation system for automotive vehicle with automatic navigation start and navigation end point search and automatic route selection Method of displaying a map Navigational plotting system Method for accurately updating positional information provided on a digital map Electronic global map generating system Method and apparatus for determining a route between a starting point and a destination InventorsAssigneeApplicationNo. 896712 filed on 07/18/1997US Classes:701/200, NAVIGATION340/990, With map display340/995.26, Including particular display structure (e.g., detachable, rolling map sheet, etc.)342/357.13, With storage device (i.e., map or database)701/208, For use in a map data base system701/212Having variable map scaleExaminersPrimary: Nguyen, Tan T.Attorney, Agent or FirmInternational ClassesG06F 165/00G01S 005/00 AbstractA computer aided map location system (CAMLS) provides correlation and coordination of spatially related data between a computer (PDA/PC/EC) and a set of printed maps typically printed on paper depicting surface features at desired levels of detail. A first set of constant scale printed maps substantially coincides with or is overprinted with equal area grid quadrangles of a first scale grid. The first scale grid quadrangles are identified by a first set of unique names. The PDA/PC/EC has a computer display or other computer output, a first database, and display subsystem. The first database includes the first set of unique names of the grid quadrangles of the first scale grid. The boundary lines of the respective first scale grid quadrangles are identified in the first database by latitude and longitude location. The display subsystem causes the display of a selected grid quadrangle or gridname on the PDA/PC/EC display in response to a user query. The displayed grid quadrangle or gridname is correlated with a grid quadrangle of a printed map from the first set of printed maps. The PDA/PC/EC may have access to a second database or multiple databases of latitude and longitude locatable objects (loc/objects) for display on selected grid quadrangles. Alternatively or in addition the PDA/PC/EC may incorporate a user location system such as a GPS location system for displaying the location and route of the CAMLS user on the display. Multiple level scales of grids and corresponding multiple sets of maps at the different scales are available. Communications links are provided between CAMLS computers and CAMLS users in various combinations.Field of SearchEmploying position determining equipmentFor use in a map data base system Route correction, modification, or verification Having variable map scale Having an self-contained position computing means (e.g., dead reckoning) Using dead-reckoning apparatus RELATIVE LOCATION With map display Land vehicle location (e.g., bus, police car | |
