Map distribution server for automotive navigation systems, map data distribution system, and road difference data production method
First Claim
1. A map distribution server that produces automotive navigation map data for automotive navigation systems, comprising:
- a lowermost-level difference translation unit; and
an upper-level difference translation unit, whereinan automotive navigation map is represented by network data in which roads are expressed with links and intersections are expressed with nodes;
automotive navigation map data has a multilevel structure in which the links are associated with one another among a minutest level and a plurality of other levels which are different from the minutest level in scale;
the automotive navigation map data includes minutest-level map data representing links of the minutest level and other-levels map data representing links of each of the plurality of other levels;
the lowermost-level difference translation unit is configured to produce relational database (RDB)-form difference data of the minutest level from RDB-form original data items including old and new map data items of the minutest level, the produced RDB-form difference data of the minutest level representing difference between the old data items of the minutest level and the new data items of the minutest level; and
the upper-level difference translation unit is configured to;
translate the difference data of the minutest level into translated data,produce difference data of each of levels of the multilevel structure that are related to the difference data of the minutest level, on the basis of the translated data and information on a relationship of association among the links of upper and lower of the levels of the automotive navigation map data,integrate the produced difference data, andproduce, based on the integrated difference data, final map difference data for the automotive navigation map; and
the server is configured to control an automotive navigation system to update an automotive navigation map based on the final difference data.
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Abstract
Automotive navigation map data has a multilevel structure in which links have a relationship of association with one another among the minutest level and upper levels that are different from the minutest level in scale. A lowermost-level translation unit uses as original data items old and new RDB-form map data items of the minutest level to produce RDB-form difference data of the minutest level. An upper-level difference translation unit produces CSV-format data of a difference of each of the levels of the multilevel structure on the basis of CSV-format data, into which the difference data of the minutest level is translated, and information on the relationship of association among the links of the upper and lower levels in the automotive navigation map data, and integrates the difference data items as final map difference data for an automotive navigation map.
15 Citations
15 Claims
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1. A map distribution server that produces automotive navigation map data for automotive navigation systems, comprising:
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a lowermost-level difference translation unit; and an upper-level difference translation unit, wherein an automotive navigation map is represented by network data in which roads are expressed with links and intersections are expressed with nodes; automotive navigation map data has a multilevel structure in which the links are associated with one another among a minutest level and a plurality of other levels which are different from the minutest level in scale; the automotive navigation map data includes minutest-level map data representing links of the minutest level and other-levels map data representing links of each of the plurality of other levels; the lowermost-level difference translation unit is configured to produce relational database (RDB)-form difference data of the minutest level from RDB-form original data items including old and new map data items of the minutest level, the produced RDB-form difference data of the minutest level representing difference between the old data items of the minutest level and the new data items of the minutest level; and the upper-level difference translation unit is configured to; translate the difference data of the minutest level into translated data, produce difference data of each of levels of the multilevel structure that are related to the difference data of the minutest level, on the basis of the translated data and information on a relationship of association among the links of upper and lower of the levels of the automotive navigation map data, integrate the produced difference data, and produce, based on the integrated difference data, final map difference data for the automotive navigation map; and the server is configured to control an automotive navigation system to update an automotive navigation map based on the final difference data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A map data distribution system, comprising:
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a map distribution server including a lowermost-level difference translation unit and an upper-level difference translation unit; and an automotive navigation terminal that is provided with an automotive navigation map by the map distribution server over a network, wherein the automotive navigation map is represented by data having a multilevel structure that includes a minutest level and a plurality of other levels which are different from the minutest level in scale; the automotive navigation map data includes minutest-level map data representing links of the minutest level and other-levels map data representing links of each of the plurality of other levels; the lowermost-level difference translation unit is configured to produce relational database (RDB)-form difference data of the minutest level from RDB-form original data items including old and new map data items of the minutest level, which are provided by a map dealer, the produced RDB-form difference data of the minutest level representing difference between the old data items of the minutest level and the new data items of the minutest level; the upper-level difference translation unit is configured to; translate the difference data of the minutest level into translated data, produce difference data of each of the levels of the multilevel structure on the basis of the translated data and information on a relationship of association among links of upper and lower of the levels of the automotive navigation map data, and integrate the produced difference data as final map difference data for the automotive navigation map; the map distribution server is configured to; distribute, in response to a map distribution request issued from the automotive navigation terminal, the final map difference data to the automotive navigation terminal; and control the automotive navigation terminal to perform updating processing on the automotive navigation map on the basis of the final map difference data, which is provided by the map distribution server, and old-generation data of the automotive navigation map which the automotive navigation terminal holds. - View Dependent Claims (11, 12)
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13. A road difference data production method for producing automotive navigation map data for automotive navigation systems in a map distribution server,
the map distribution server including a lowermost-level difference translation unit configured to produce difference data of a minutest level of an relational database (RDB) form, and an upper-level difference translation unit configured to produce difference data of each of levels of a multilevel structure, an automotive navigation map being represented by network data in which roads are expressed with links and intersections are expressed with nodes, and the automotive navigation map data having the multilevel structure in which the links have a relationship of association with one another among the minutest level and a plurality of other levels which are different from the minutest level in scale, and the automotive navigation map data including minutest-level map data representing links of the minutest level and other-levels map data representing links of each of the plurality of other levels, the road difference data production method comprising the steps of: -
producing RDB-form difference data of the minutest level from original data items including old and new RDB-form map data items of the minutest level, the produced RDB-form difference data of the minutest level representing difference between the old data items of the minutest level and the new data items of the minutest level; translating the difference data of the minutest level into translated data; producing, as road difference data, difference data items of the respective levels of the multilevel structure on the basis of the translated data and information on the relationship of association among the links of upper and lower of the levels of the automotive navigation map data; producing final map difference data for the automotive navigation map; and controlling, by the map distribution server, an automotive navigation system to update the automotive navigation map based on the final difference data. - View Dependent Claims (14, 15)
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Specification