Chart database with three-level indexing structure and data reading method thereof

A three-level indexing and database technology, which is applied in still image data retrieval, electrical digital data processing, still image data indexing, etc., can solve the problems of low chart display speed and slow reading of chart data, and improve the display speed , the effect of improving the reading speed

Active Publication Date: 2016-03-23
SHENZHEN UNIV
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Problems solved by technology

However, because the traditional chart database does not design the chart index and object

Method used

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  • Chart database with three-level indexing structure and data reading method thereof
  • Chart database with three-level indexing structure and data reading method thereof

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[0036] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments.

[0037] figure 1 Shown is a schematic diagram of the three-level index structure of the chart database with a three-level index structure. The chart database with a three-level index structure includes several charts, the chart database has chart index 1, and chart index 1 includes various charts (sea charts). figure 1 ,sea figure 2 , Chart 3,..., chart n) index information, the index information of the chart includes the coverage area information of the chart. From the chart index 1 can find the charts that meet the query conditions. At the same time, each chart has its own internal index, and the internal index of each chart can be used to further search for the internal object mark of the chart. The internal index includes object classificati...

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Abstract

The invention relates to a chart data index, and in particular relates to a chart database with a three-level indexing structure and a data reading method thereof. According to the invention, a chart index is designed in the chart database; a chart can be retrieved through the chart index; simultaneously, internal indexes of various charts are designed; the internal indexes include object classification indexes and object indexes in the corresponding charts; the object classification indexes and the object indexes of the corresponding charts can be sequentially searched according to classification attributes and characteristic attributes of objects in need of being displayed in a target display area; and thus, the objects in need of being displayed can be located and displayed. By means of the three-level indexing structure, the chart data reading speed can be greatly increased; and thus, the chart display speed is increased.

Description

technical field [0001] The invention relates to a chart data index, in particular to a chart database with a three-level index structure and a data reading method thereof. Background technique [0002] The chart display process involves reading the chart data in the chart database. The chart database includes several charts, and each chart includes a large number of objects of different types, so the chart database involves a huge amount of data. However, due to the lack of design of the chart index and object classification index in the traditional chart database, the reading of chart data is slow and the chart display speed is low. Contents of the invention [0003] The technical problem to be solved by the present invention is to propose a nautical chart database with a three-level index structure and a data reading method thereof, so as to improve the reading speed of nautical chart data. The present invention is achieved like this: [0004] A chart database with a ...

Claims

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Application Information

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IPC IPC(8): G06F17/30
CPCG06F16/00G06F16/51
Inventor 王娜钟国权李霞徐滔
Owner SHENZHEN UNIV
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