Navigation electronic map data processing method and storage method based on same

An electronic map and processing method technology, applied in directions such as road network navigators, can solve the problems of large storage capacity and long response time, and achieve the effects of saving storage space, reducing storage pressure, and concise and clear logical relationships.

Inactive Publication Date: 2011-11-23
LINKTECH NAVI TECH
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  • Abstract
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Problems solved by technology

[0004] The present invention provides a processing method for navigation electronic map coordinate data and a storage method using the processing method, which solves the problems of large storage capacity and long response time in the process of map switching in the prior art

Method used

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  • Navigation electronic map data processing method and storage method based on same
  • Navigation electronic map data processing method and storage method based on same
  • Navigation electronic map data processing method and storage method based on same

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Embodiment Construction

[0036] In order to make it easier for those skilled in the art to understand and realize the present invention, the embodiments of the present invention are described in conjunction with the accompanying drawings.

[0037] like figure 1 , 2 As shown, the processing method of the navigation electronic map coordinate data of the present invention comprises the following steps:

[0038] 1) According to the shape of the actual electronic map, establish a circumscribing rectangle circumscribing the electronic map, wherein two sides of the circumscribing rectangle face the east-west direction, while the other two sides face the north-south direction (such as figure 2 shown);

[0039] 2) Record the coordinates of vertex A in the lower left corner (southwest corner) in the circumscribed rectangle, namely (41562842, 14322864);

[0040] 3) Judging whether the collected electronic map data is point data (such as bus stops, crossroads or other geographical information data that can be...

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Abstract

The invention provides a processing and storage method for navigation electronic map coordinate data. The method comprises the following steps of: establishing an external rectangle externally connected with an electronic map, and recording the coordinates of one peak; calculating and storing relative coordinates of electronic map data to be acquired relative to the peak; forming a map set by using a set of the processed geographic data, and making a plurality of data files; partitioning each data file into map sheets, and establishing a map sheet node tree; and finally, establishing a medium control file in a storage medium, and storing the electronic map data into the storage medium. By using the processing and storage method, the storage space is saved, and the storage pressure of the storage medium is greatly reduced; and on the other hand, because the medium control file is established for storage management in the storage method, the logic relationship of the electronic map data in the storage medium is compact and clear, the corresponding electronic map can be quickly and conveniently searched, and the response time in the map set switching process is greatly shortened.

Description

technical field [0001] The invention relates to the field of electronic maps, in particular to a navigation electronic map coordinate data processing method and a data storage method based on the processing method. Background technique [0002] In the existing technology about the processing method of the navigation electronic map coordinate data, the electronic map data to be stored is not processed, but the element information is directly recorded, that is, the specific elements in the navigation data within the atlas are directly recorded , for example, the attribute of a point information is: unique ID: 1, belongs to the financial system, belongs to the bank category, the name is Xidan Branch of Bank of Beijing, coordinates: (540078.1254, 45684123.3256). Directly recording element information is to record attributes as: 1, finance, bank, Xidan branch of Bank of Beijing, (540078.1254, 45684123.3256), telephone number, etc. And if the information to be recorded is a piece...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01C21/32
Inventor 陈小平韩宝成
Owner LINKTECH NAVI TECH
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