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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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  • Summary
  • Abstract
  • Description
  • 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 increase in terminal power consumption.
[0007] It can be seen that the existing two map data storage methods have their own defects when applied to mobile terminals.

Method used

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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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Embodiment Construction

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

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

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

[0087] storing the map data whose scale level is not higher than the threshold 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 present application may include the following steps:

[0090] Receive the user's map data query request, the query request carries 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;

[...

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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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