Method for creating incremental navigation database and method for updating same
An incremental, database technology, applied in the database field, can solve the problems of high hardware requirements of the navigation client, complicated process of updating and compiling POI data, and difficulty in adding POI data, so as to reduce coupling, reduce hardware resource consumption and The effect of the complexity of the update process
Active Publication Date: 2013-10-30
NAVINFO
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Problems solved by technology
[0006] The technical problem to be solved by the present invention is to provide a method for establishing an incremental navigation database and a method for updating the database, so as to solve the problem of strong coupling between POI data in the prior art, which makes it difficult to add new POIs Data, and the process of updating and compiling point-of-interest data is too complicated, and has high requirements for navigation client hardware, etc.
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[0025] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.
[0026] The present invention proposes a point of interest storage model and a technology for incrementally updating point of interest (POI, Point of Interest) data based on the point of interest storage model, wherein,
[0027] Points of interest, a term for navigation map technology, denote things that need to be paid attention to during the update process.
[0028] Map grid (MESH), the navigation map is divided into several rectangular data blocks according to the range of latitude and longitude. Compared with the data of the entire navigation map, a data block contains a smaller amount of data and can be loaded into the memory.
[0029] Binary Large Object (BLOB, Binary Large Object), used to store binary data of a custom structure.
[0030] Embedded...
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An embodiment of the invention provides a method for creating an incremental navigation database and a method for updating the same. The incremental navigation database comprises primary tables, at least one secondary table and at least one differential version interest point index table. The method for creating the incremental navigation database includes creating the primary tables and the secondary tables which are used for storing interest point data; creating the differential version interest point index tables on the basis of the primary tables and the secondary tables; dividing index contents in each differential version interest point index table into a record deletion portion and a record addition portion. Keywords and the index contents of the interest point data in the primary tables and the secondary tables are recorded in the differential version interest point index tables. The method for creating the incremental navigation database and the method for updating the incremental navigation database have the advantages that the primary tables and the secondary tables are created for the interest point data, so that coupling degrees among the data are reduced; the interest point index tables are created on the basis of the primary tables and the secondary tables, and the primary tables and the secondary tables can be quickly retrieved via the index contents, so that consumption of hardware resources for retrieving interest points in navigation maps and the complexity of an updating procedure are reduced.
Description
technical field [0001] The invention relates to database technology, in particular to a method for establishing an incremental navigation database and a method for updating the database. Background technique [0002] Navigation application technology needs to ensure the accuracy of data. The accuracy of data is mainly determined by the current situation of the data. Therefore, the navigation map must be updated frequently to ensure the current situation. Traditional navigation data is generally updated as a whole every six months to one year. , due to the long update cycle and the large amount of updated data, it can no longer meet the needs of customers; especially now that the city is changing rapidly, the development of various large-scale urban construction projects may cause major changes in the data in a short period of time, so there is an urgent need for a A new technology to replace the traditional data update technology. [0003] Incremental update refers to the p...
Claims
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IPC IPC(8): G06F17/30
Inventor 刘志毅袁松安
Owner NAVINFO