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A motor vehicle mileage logging system is disclosed that will calculate a cumulative mileage log by summing several different types of individual trip logs. The system is installed on a vehicle having a navigation assist system. A first type of individual trip log includes mileage information determ

A motor vehicle mileage logging system is disclosed that will calculate a cumulative mileage log by summing several different types of individual trip logs. The system is installed on a vehicle having a navigation assist system. A first type of individual trip log includes mileage information determined as the vehicle is driven from an origination point to a destination point with the assistance of the navigation system. A second type of individual trip log includes mileage information that is estimated by the navigation assist system using a manually entered origination point and a manually entered destination point. A third type of individual trip log includes a manually entered estimated mileage log.

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1. A method for creating a cumulative mileage log in a vehicle having a navigation assist system, the method comprising:determining a mileage actually traveled using the navigation assist system;storing at least one first data set including the mileage actually traveled with the navigation assist sy

1. A method for creating a cumulative mileage log in a vehicle having a navigation assist system, the method comprising:determining a mileage actually traveled using the navigation assist system;storing at least one first data set including the mileage actually traveled with the navigation assist system;manually entering at least one second data set indicative of mileage traveled independent of the navigation assist system;accessing at least one first data set and at least one second data set; anddetermining a cumulative mileage log based on the accessed at least one first data set and at least one second data set. 2. The method of claim 1 further comprising receiving the at least one first data set from the navigation assist system. 3. The method of claim 1 further comprising storing the at least one second data set. 4. The method of claim 1 wherein manually entering the at least one second data set includes entering an origination point and a destination point. 5. The method of claim 1 wherein manually entering the at least one second data set includes entering an estimated mileage. 6. The method of claim 1 wherein there are a plurality of first data sets. 7. The method of claim 1 wherein there are a plurality of second data sets. 8. The method of claim 1 wherein accessing the at least one first data set and the at least one second data set includes manually selecting at least one first data set and at least one second data set to be included in the cumulative mileage log. 9. The method of claim 1 wherein determining a cumulative mileage log includes summing the accessed at least one first data set and at least one second data set. 10. The method of claim 1 further comprising determining a second cumulative mileage log based on the accessing of the at least one first data set and at least one second data set. 11. A method for creating a cumulative mileage log in a vehicle having a navigation assist system, the method comprising:using the assistance of the navigation assist system while traveling from a first origination point to a first destination point;determining a mileage between the first origination point and the first destination point;creating a first single trip mileage log calculated from the mileage traveled between the first origination point and the first destination point;manually entering a second origination point into the navigation assist system;manually entering a second destination point into the navigation assist system;estimating the mileage between the second origination point and the second destination point;creating a second single trip mileage log calculated from the estimated mileage between the second origination point and the second destination point;manually selecting individual single trip logs to be included in a cumulative mileage log; anddetermining a cumulative mileage log by summing the selected individual single trip mileage logs. 12. The method of claim 11 further comprising:creating a plurality of single trip mileage logs calculated from the mileage traveled between a plurality of origination points and a plurality of destination points; andcreating a plurality of single trip mileage logs calculated from estimated mileage between a plurality of manually entered origination points and manually entered destination points. 13. The method of claim 12 further comprising determining a second cumulative mileage log by summing a second set of selected single trip mileage logs. 14. The method of claim 11 further comprising determining a third single trip mileage log by entering through the user input an estimated mileage driven from a third origination point to a third destination point. 15. The method of claim 14 further comprising determining a third cumulative mileage log by summing a third set of selected single trip mileage logs. 16. The method of claim 11 further comprising transferring the mileage log information to a separate computer system. 17. A motor vehicle mileage logging system c omprising:a controller positioned within the vehicle capable of accessing a map database;a user input mechanism in communication with the controller;a display for receiving and displaying information from the controller;an antenna positioned on the vehicle for receiving signals transmitted by satellites in a global positioning system and in communication with the controller;a vehicle speed sensor in communication with the controller;a directional orientation measuring device mounted on the vehicle and in communication with the controller; andwherein the controller calculates a cumulative mileage log including selected individual mileage logs, wherein the individual mileage logs include actual vehicle travel mileage logs determined by the controller using input from the antenna, vehicle speed sensor, and directional orientation measuring device and estimated mileage logs determined by the controller using a desired origination point and a desired destination point entered through the user input mechanism. 18. The logging system according to claim 17 wherein the cumulative mileage log further includes an individual mileage log determined by a mileage estimate between an origination point and a destination point entered through the user input mechanism. 19. The logging system according to claim 17 wherein the controller calculates a second cumulative mileage log including a second set of selected individual mileage logs. 20. The logging system according to claim 17 wherein the directional orientation measuring device is a gyro. 21. The logging system according to claim 17 wherein the directional orientation measuring device is a digital compass. 22. The logging system according to claim 17 wherein the controller further includes an output port for connection to an auxiliary computer system. 23. The logging system according to claim 22 wherein the auxiliary computer system is a personal digital assistant.