Space vector data storage method based on additional files and coordinate system conversion system

Abstract

The invention provides a space vector data storage method and system based on additional files. The method comprises the steps: enabling each part of space vector data to be stored through a corresponding Shapefile; adding a text file of which the suffix name is. Tra into the Shapefile, wherein the following information is recorded in the text file: a coordinate system conversion method and corresponding coordinate system conversion parameters; converting the space vector data under the first geographic coordinate system into space vector data under a WGS-84 geodetic coordinate system; and converting the space vector data under the WGS-84 geodetic coordinate system into space vector data under a second geographic coordinate system. Therefore, when the coordinate conversion of the space vector data in different coordinate systems is carried out, the space vector data in the original coordinate system can be automatically and quickly converted into the space vector data in the target coordinate system by taking the WGS1984 coordinate system as a bridge, and the method has the advantage of high coordinate system conversion efficiency.

Description

technical field [0001] The invention belongs to the technical field of coordinate conversion, and in particular relates to a space vector data storage method and a coordinate system conversion system based on an additional file. Background technique [0002] Space vector data internally stores information such as spatial information and the geographic coordinate system in which the spatial information is located. The geographic coordinate systems used in various applications are different, including the BJ54 coordinate system and the CGCS2000 coordinate system. When a spatial vector data is converted from one geographic coordinate system to another, there are many conversion methods, and the conversion parameters used in different regions will be different. [0003] In the existing space vector data files, data managers generally record the coordinate transformation method and coordinate transformation parameters in notebooks or other places. Once this information is lost, t...

AI Technical Summary

Problems solved by technology

[0003] In the existing space vector data files, data managers generally record the coordinate transformation method and coordinate transformation parameters in notebooks or other places. Once this information is lost, the coordinate transformation parameters of the space vector data need to be recalculated, and the calculation steps are very cumbersome. The problem

In addition, when performing coordinate conversion, it is necessary to manually input the conversion method and conversion parameters before performing coordinate conversion. If there are a large number of data files that need to convert the coordinate system, the operation is very complicated and cannot be processed automatically, and the efficiency is very low

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