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DEVICE AND METHOD FOR PREPARING DIFFERENCE UPDATE DATA FOR NAVIGATION, NAVIGATION SYSTEM AND METHOD, DIFFERENCE UPDATE DATA SET FOR NAVIGATION, AND COMPUTER PROGRAM
DEVICE AND METHOD FOR PREPARING DIFFERENCE UPDATE DATA FOR NAVIGATION, NAVIGATION SYSTEM AND METHOD, DIFFERENCE UPDATE DATA SET FOR NAVIGATION, AND COMPUTER PROGRAM
PROBLEM TO BE SOLVED: To efficiently access a difference data concerned in road data update, and to allow normal navigation processing even when reflecting the difference data onto an original road data.;SOLUTION: This difference update data preparing device is provided with the first preparing means for preparing the difference update data including one road data indicating a new road updated using the road data as a reference and a junction thereof, and the same road data same to other road data indicating an existing road connected to the new road and the junction thereof and a junction thereof, in the plurality of road data for the navigation indicating the existing roads and the junctions thereof and based on a prescribed format, and the second preparing means for preparing a merge data for specifying a correspondence relation of the difference update data to the plurality of road data the road by the road or the junction by the junction, including a delete flag to delete the other road data from the difference update data in navigation processing.;COPYRIGHT: (C)2004,JPO&NCIPI
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