| 主权项 |
1. A method of providing a logging function in a personal navigation device, the method comprising the steps of:
storing information relating to current position and time-specific information relating to said current position in a non-volatile memory of the device to create a log file, said step of storing occurring only when one of a specified set of events occurs, said set of events being at least one of:
user-specification of an spatial, temporal or device event, changing an activity between business and personal, reaching a destination, powering the device on and/or off, being stationary at a location for more than a predetermined time period, arriving at or departing from any favorite or recent location stored in the memory of the device, and arriving at or departing from any home location stored in the memory of the device; receiving a navigation mode or a free-driving mode of operation selection on the navigation device, wherein the selection causes an automatic storing of information related to a selectable additional set of events specific to either the navigation mode or the free-driving mode that are different for each of the mode of operation; and compressing a collection of events in said log file that were collected in said free-driving mode, said compressing comprising:
determining, based on information in said log file, two or more locations that were traveled to during said free-driving mode;calculating a notional route between said two or more locations;iterating through event information included in said log file to determine whether any of said two or more locations are present on said notional route; andwhen said two or more locations are represented on said notional route, replacing, in said log file, some or all of said collection of events by said notional route. |
