Geographic data coordinate conversion method and device, medium and product

Abstract

The invention provides a coordinate conversion method for geographic data. The coordinate conversion method comprises the steps of obtaining grid data of a to-be-converted area, encoding parameters, generating current parameter information, determining grid point codes and performing coordinate conversion. According to the coordinate conversion method of the geographic data, the current parameter information of the four grid endpoints corresponding to each to-be-converted point can be quickly and accurately screened out, so that the efficiency of converting the to-be-converted points from the original coordinate system to the target coordinate system is improved, and the coordinate conversion accuracy is improved.

Description

technical field [0001] The invention relates to the field of geographic data processing, in particular to a coordinate transformation method, equipment, medium and product of geographic data. Background technique [0002] In recent years, the geospatial data of the province's land and resources will update the specifications of the coordinate system from time to time, so that it can display all geospatial data in a unified new coordinate system. The stock data stored in the original coordinate system is transformed into the new coordinate system (ie, the target coordinate system). [0003] In the actual geographic data coordinate conversion work, the most commonly used multi-parameter method is Bursa model conversion, seven-parameter model conversion, four-parameter model conversion, and map frame correction value conversion in the grid method. The accuracy of the correction amount conversion is the highest. However, it is difficult to determine the parameter information o...

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Problems solved by technology

[0005] The second object of the present invention is to provide an electronic device, which can solve the problem that it is difficult to determine the parameter information of the point to be converted corresponding to the grid end point in the map frame to be converted in the current map correction amount conversion process, and it is necessary to convert the point to be converted Compared with each grid endpoint, the efficiency of coordinate transformation is greatly reduced

[0006] The third object of the present invention is to provide a computer-readable storage medium, which can solve the problem that it is difficult to determine the parameter information of the point to be converted corresponding to the grid end point in the map frame to be converted in the current map correction amount conversion process. The point to be converted is compared with each grid endpoint, which leads to a problem that the efficiency of coordinate conversion is greatly reduced

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