Electronic map data storage and query method, device and system

A technology for map data and electronic maps, which is applied in electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as increased terminal power consumption, reduce power consumption, reduce the demand for system processing resources, and improve image rendering. effect of speed

Inactive Publication Date: 2012-03-07
BEIJING BAIDU NETCOM SCI & TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

In addition, power consumption is also an important consideration for mobile terminals. A large number of rendering operations will inevitably lead to an increa

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  • Electronic map data storage and query method, device and system
  • Electronic map data storage and query method, device and system
  • Electronic map data storage and query method, device and system

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[0084] First, the electronic map data storage method and query method provided by the embodiments of the application are described:

[0085] Among them, the electronic map data storage method may include the following steps:

[0086] Divide the map data into multiple levels according to the scale in advance, and set a scale level threshold;

[0087] Storing map data whose scale level is not higher than the threshold value in a raster data format;

[0088] The map data whose scale level is higher than the threshold is stored in a vector data format.

[0089] The electronic map data query method provided by the embodiment of the application may include the following steps:

[0090] Receiving a map data query request from a user, the query request carrying scale level information and geographic location information;

[0091] According to the scale level information, judge whether the scale level requested by the user is higher than a preset scale level threshold;

[0092] If so, obtain corres...

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Abstract

The invention discloses an electronic map data storage and query method, device and system. The electronic map data storage and query method comprises the following steps of: grading the map source data into a plurality of grades according to the sizes of proportional scales, and setting a proportional scale grade threshold; storing the map data, of which the proportional scale grade is not higher than the threshold, according to a raster data format; and storing the map data, of which the proportional scale grade is higher than the threshold, according to a vector data format. In the technical scheme provided by the embodiment of the invention, the map data is stored according to two modes including a raster data mode and a vector data mode, so as to give consideration to the requirements on two aspects of exhibition effect and performance of the electronic map on a mobile terminal.

Description

technical field [0001] The present application relates to the technical field of electronic maps, in particular to methods, devices and systems for storing and querying electronic map data. Background technique [0002] Electronic map, also known as digital map, is a map stored and queried digitally using computer technology. Compared with traditional paper maps, the production, management, reading and use of electronic maps can be integrated, which is convenient for real-time modification; using the data query capabilities of computers, electronic maps can achieve faster and more diverse query methods , which is convenient for users to use. In addition, electronic maps can easily combine and splicing elements of ordinary maps in any form to form new maps, and can synthesize information such as images, sounds, and texts to achieve various display effects. [0003] At present, there are mainly two data storage methods for electronic map data, which are stored in raster data...

Claims

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Application Information

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IPC IPC(8): G06F17/30
Inventor 佘党恩
Owner BEIJING BAIDU NETCOM SCI & TECH CO LTD
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