Navigation Device and Map Data Product
First Claim
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1. A navigation device, comprising:
- a storage unit that stores map data divided into a plurality of files for a predetermined map range;
an acquisition unit that acquires map updating data for updating the map data;
an extraction unit that extracts at least one file from among the map data files; and
an updating unit that updates the map data by storing new map data files based upon the map updating data in the storage unit, after having deleted the map data files from the storage unit with the exception of the file extracted by the extraction unit.
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Abstract
A navigation device includes: a storage unit that stores map data divided into a plurality of files for a predetermined map range; an acquisition unit that acquires map updating data for updating the map data; an extraction unit that extracts at least one file from among the map data files; and an updating unit that updates the map data by storing new map data files based upon the map updating data in the storage unit, after having deleted the map data files from the storage unit with the exception of the file extracted by the extraction unit.
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Citations
6 Claims
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1. A navigation device, comprising:
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a storage unit that stores map data divided into a plurality of files for a predetermined map range; an acquisition unit that acquires map updating data for updating the map data; an extraction unit that extracts at least one file from among the map data files; and an updating unit that updates the map data by storing new map data files based upon the map updating data in the storage unit, after having deleted the map data files from the storage unit with the exception of the file extracted by the extraction unit. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification