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Apparatus, systems and methods are provided for portable navigation devices with various integrated positioning functionality. The apparatus includes a portable electronic device having a processor in communication with a memory. The memory is adapted to store navigation related data. The navigation

Apparatus, systems and methods are provided for portable navigation devices with various integrated positioning functionality. The apparatus includes a portable electronic device having a processor in communication with a memory. The memory is adapted to store navigation related data. The navigation related data includes cartographic data including a number of locations and data indicative of thoroughfares of a plurality of types connecting certain ones of the locations. The portable electronic device includes a GPS receiver adapted to communicate with the memory and processor. And, the portable electronic device includes a dead reckoning component, including a rate gyro, pedometer, and/or accelerometer adapted to communicate to memory and processor.

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1. A method for navigation using a portable navigation device equipped with a GPS receiver and a dead reckoning positioning functionality, the method comprising the steps if:determining a current position of the device using the GPS receiver so as to calculate a route through a network of thoroughfa

1. A method for navigation using a portable navigation device equipped with a GPS receiver and a dead reckoning positioning functionality, the method comprising the steps if:determining a current position of the device using the GPS receiver so as to calculate a route through a network of thoroughfares; if the determination of the current position as determined by the GPS receiver is at least partially degraded, determining the current position of the device using the dead reckoning positioning functionality; and if the determination of the current position as determined by the GPS receiver is substantially accurate, calibrating the dead reckoning functionality using the GPS receiver. 2. The method of claim 1, wherein the portable navigation device is a multifunction device selected from the group of a Personal Digital Assistant (PDA) enabled device and a cell phone enabled device.3. The method of claim 2, wherein the portable navigation device includes an integral compass.4. The method of claim 3, wherein the portable navigation device includes a distance detection component.5. The method of claim 4, wherein the distance detection component is a pedometer.6. The method of claim 1, wherein the portable navigation device is operable to track a movement of the device.7. The method of claim 1, wherein the method further includes retrieving navigation related data from a memory of the portable navigation device, wherein the navigation related data includes navigation data selected from the group of automobile navigation data, marine craft navigation data, pedestrian navigation data, and hiking navigation data.8. The method of claim 7, wherein retrieving navigation related data from the memory of the portable navigation device includes retrieving navigation related data selected from the group of a number of waypoints, a planned route, and points of interest.9. The method of claim 8, wherein retrieving navigation related data for points of interest includes retrieving points of interest selected from the group of geographical points of interest, entertainment venues, dining venues, and lodging venues.10. A method for navigation using a portable navigation device equipped with a GPS receiver and a dead reckoning positioning functionality, the method comprising the steps of:determining a current position of the portable navigation device using the GPS receiver calculating a route through a network of thoroughfares represented by a set of data; if the determination of the current position as determined by the GPS receiver is at least partially degraded, determining the current position of the device using the dead reckoning positioning functionality so as to continue calculating the route; if the determination of the current position as determined by the GPS receiver is substantially accurate, calibrating the dead reckoning functionality using the GPS receiver; and if the determination of the current position as determined by the dead reckoning functionality is substantially accurate, calibrating the GPS receiver using the dead reckoning functionality. 11. The method of claim 10, wherein the portable navigation device includes a rate gyro positioning functionality.12. The method of claim 10, wherein the portable navigation device includes an accelerometer positioning functionality.13. The method of claim 10, wherein the method further includes software accessible by the portable navigation device for:maintaining a track log; storing one or more waypoints; planning a route; and finding points of interest. 14. The method of claim 10, wherein the portable navigation device is selected from the group of a cell phone, a PDA, and an article of intelligent apparel.15. The method of claim 10, wherein the portable navigation device is a multifunction device, and wherein the method further includes:retrieving an address from an address book; adding a waypoint as an address in the address book; adding a point of interest as an address in the address book; storing a planned route; retrieving a phone number from a phone list; adding a phone number to the phone list; and adding an entry in a to-do list. 16. A portable electronic device, comprising:a memory to store navigation related data, the navigation related data including data indicative of thoroughfares; a GPS receiver for determining a current position of the electronic device; a dead reckoning component; a processor adapted to communicate with the memory, GPS receiver, and dead reckoning component, wherein the processor is operable to calculate a route through the thoroughfares and is further operable to calibrate the GPS receiver using the dead reckoning component; and a portable housing for storing the GPS receiver, the dead reckoning component, and the processor. 17. The portable electronic device of claim 16, wherein the dead reckoning component includes at least one component selected from the group of a rate gyro, a pedometer, and an accelerometer.18. The portable electronic device of claim 16, wherein the device is selected from the group of a PDA-enabled device and a cell phone-enabled device.19. The portable electronic device of claim 18, where the PDA-enabled device and the cell phone-enabled device include a compass and an internal power supply.20. The portable electronic device of claim 16, wherein the navigation data includes navigation data selected from group of one or more waypoints, a route between two or more locations, and one or more points of interest.21. The portable electronic device of claim 16, wherein the device is operable to determine the current position of the device using the dead reckoning component if the GPS receiver's ability to determine the current position is at least partially degraded.22. The portable electronic device of claim 21, wherein the dead reckoning component includes at least one of a rate gyro, a pedometer and an accelerometer.23. The portable electronic device of claim 22, wherein the device includes a display operable to display the location of the device and a route to a desired destination, and wherein the device is adapted to navigate the route to the desired destination using audio and visual guidance.24. A portable electronic device, comprising:a memory adapted to store navigation related data, the navigation related data including data indicative of thoroughfares; a GPS receiver for determining a current position of the electronic device; a dead reckoning component for determining the current position, such that when the current position as determined by the GPS receiver is partially degraded, the current position as determined by the dead reckoning component may be used to supplement the current position as determined by the GPS receiver; a processor adapted to communicate with the memory, GPS receiver, and dead reckoning component and further operable to calibrate the GPS receiver using the current position as determined by the dead reckoning component; a display operable to display the current position of the device; and a portable housing including the memory, the GPS receiver, the dead reckoning component, the processor and the display. 25. The portable electronic device of claim 24, wherein the dead reckoning component includes at least one component selected from the group of a rate gyro, a pedometer, and an accelerometer.26. The portable electronic device of claim 24, wherein the thoroughfares include at least one thoroughfare selected from the group of a road, a street, a highway, and an interstate.27. The portable electronic device of claim 24, wherein the device is selected from the group of a PDA-enabled device and a cell phone-enabled device.28. The portable electronic device of claim 27, where the PDA-enabled device include a compass and an internal power supply.29. The portable electronic device of claim 24, wherein the device uses audio and visual guidance direct a user of the device.