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Deviation rectifying method of electronic map

An electronic map and map technology, which is applied in the fields of electronic digital data processing, special data processing applications, instruments, etc., can solve the problems of inability to guarantee the return speed and frequent interaction of data sets and databases, so as to improve performance, reduce the amount of queries, and reduce interactive effect

Inactive Publication Date: 2013-04-10
TIANJIN IC CARD PUBLIC NETWORK SYST
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Problems solved by technology

For the vehicle real-time monitoring function and track playback function of the gis system in the intelligent dispatching system, the data set that needs to be corrected is huge and interacts frequently with the database. A single query of the correction library will put a lot of pressure on the database, and the return speed cannot be guaranteed

Method used

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  • Deviation rectifying method of electronic map

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Embodiment Construction

[0019] Take the map of China as an example to illustrate the application of this method.

[0020] (1) Grid division method

[0021] In China, 135.04167175293 degrees east longitude, 53.5499992370605 degrees north latitude, 73.6666641235352 degrees west longitude, and 3.86666655540466 degrees south latitude are taken as reference parameters. The first-level grid divides the Chinese area into 3 blocks in the east-west direction, and 4 blocks in the north-south direction; the second-level grid divides each first-level grid into 20×20 areas; the third-level grid divides each The secondary grid is equally divided into 10×10 areas. Introduce google mapapi to display proportionally divided grid areas on the map through var polyline=new google.maps.Polyline({path}); method.

[0022] (2) Form a local data file

[0023] After the grid area division is completed, write and read local Excel files. The boundary coordinate points of the grid areas at all levels are stored in the Excel l...

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Abstract

The invention relates to a method for processing image data, and further relates to a deviation rectifying method of an electronic map. The deviation rectifying method comprises the following steps: 1, dividing grids: forming M*N rectangular grids by dividing an electronic map of a region to be subjected to deviation rectification; 2, calculating offset: calculating and storing longitude offset X2M, Y2N of each grid, wherein X2M=X1M-X0M, and Y2N=Y2N-Y0N; and 3, searching the grids to rectify deviation. Compared with the prior art, the deviation rectifying method of the electronic map, disclosed by the invention, has the following advantages of introducing a grid dividing method to combine a boundary region coordinate with an administrative region coordinate. When offset is carried out by aiming to cities, the query amount of deviation rectification data can be largely reduced.

Description

Technical field: [0001] The invention relates to a processing method of general image data, and further relates to a deviation correction method of an electronic map. Background technique: [0002] Most of the original intelligent dispatching systems use local maps for map services, such as mapInfo maps, ArcGIS maps, etc., but the service effect and functions of maps are not as good as the popular Google maps today. For the public transportation industry, which needs to reflect the uploaded GPS point coordinates on the map in real time, there is a problem of offset in Google's electronic map. This has caused the GPS coordinates sent by the vehicle to be accurately fed back on the map. For different applications in various industries, the solutions are also different. In the past, the feasible deviation correction solution was generally to establish its own deviation correction database, but the deviation correction database established for all longitude and latitude points...

Claims

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Application Information

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IPC IPC(8): G06F17/30
Inventor 靳展李胜利王红广张东旭
Owner TIANJIN IC CARD PUBLIC NETWORK SYST
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