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Data extraction method and device

A technology of data extraction and data information, which is applied in the direction of electronic digital data processing, structured data retrieval, geographic information database, etc., can solve the problem of incomplete map and achieve the effect of ensuring the integrity of topology and logic

Active Publication Date: 2014-04-16
NAVINFO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention discloses a data extraction method and device, which are used to solve the problem that the image frames extracted from the electronic map are not complete enough in the prior art

Method used

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Embodiment Construction

[0023] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways defined and covered by the claims.

[0024] figure 1 A flow chart showing the data extraction method described in Embodiment 1 of the present invention.

[0025] see figure 1 As shown, the data extraction method is used to completely extract the data of the predetermined range in the electronic map, which may include:

[0026] S101: Extract first data information within the predetermined range;

[0027] S103: Obtain second data information that is outside the predetermined range and has a dependency relationship with the first data information;

[0028] S105: Output the first data information and the second data information.

[0029] In this embodiment, for an electronic map stored in a spatial database, it is desired to define an arbitrary polymorphic range, extract any type of sp...

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Abstract

The invention provides a data extraction method and device. The method and the device are used for completely extracting data within the preset range in an electronic map. The data extraction method comprises the steps of extracting first data information within the preset range, obtaining second data information which is outside the preset range and forms dependency with the first data information, and outputting the first data information and the second data information. According to the technical scheme, the data within the given range in an electronic map book in a spatial database can be extracted completely, the data which are outside the given range and are related to the data are also extracted, and therefore the topology and the logic integrity of the extracted data can be ensured.

Description

technical field [0001] The present invention relates to data extraction in electronic maps, and more specifically, to a data extraction method and device. Background technique [0002] Traditional electronic map data ensures the integrity of the map data through the data segmentation of the map frame and the layering of elements. This method will cause complex elements and relationships to be split at the border of the map, and in order to construct a complete complex element, it is necessary to process the edges, which brings complexity to the processing. For example: a complex intersection is divided into two parts at the boundary of the map frame, then it is necessary to define two incomplete intersections in the two map frames, and then define the border relationship between the two intersections to form a complete intersection. [0003] With the development of spatial relational databases, the traditional mechanism of data storage, management and processing in units o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30G09B29/00
CPCG06F16/29G09B29/00
Inventor 刘青廖佛林徐晋晖
Owner NAVINFO
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