Coordinate conversion method and apparatus, computer device and storage medium
A coordinate conversion and computer program technology, applied in the field of geographic information, can solve the problems of low accuracy of converted coordinates and ignore the spatial correlation of points, etc., and achieve the effect of high-precision coordinate conversion
Inactive Publication Date: 2019-01-11
广东省地质测绘研究院有限公司
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Problems solved by technology
In the process of realizing the present invention, the inventor found that there are at least the following problems in the prior art: the conventional grid correction model only realizes the calculation of the correction amount on the grid point according to the inverse weighting of the distance, thus ignoring the spatial correlation of the point position , the accuracy of the converted coordinates obtained is not high
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[0026] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0027] The method of coordinate conversion provided by this application can be applied to such as figure 1 in the computer equipment shown. The computer device can be a server, and its internal structure diagram can be as follows figure 1 shown. The computer device includes a processor, memory, network interface and database connected by a system bus. Wherein, the processor of the computer device is used to provide calculation and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an o...
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The invention relates to a coordinate conversion method and apparatus, a computer device and a storage medium, belonging to the field of geographic information technology. The method comprises the following steps of: determining an evaluation distance between a plurality of known points and grid points in a pre-established grid; determining a coordinate evaluation coefficient according to the evaluation distance, and determining an evaluation coordinate of a grid point in the second coordinate system according to the coordinate evaluation coefficient and the coordinates of the plurality of known points in the second coordinate system; determining a grid correction amount of the grid points according to the coordinates of the grid points in the first coordinate system and the evaluation coordinates; establishing a conversion model according to the grid correction, wherein the conversion model is used to determine the coordinates of the point to be converted in the first coordinate system to be converted into the coordinates in the second coordinate system. The technical scheme solves the problem that the spatial correlation of the points in the coordinate conversion process is ignored and the accuracy of the coordinate conversion is not high. The spatial correlation is taken into consideration, and the coordinate transformation with high precision is realized.
Description
technical field [0001] The present invention relates to the technical field of geographic information, in particular to a coordinate conversion method, device, computer equipment and storage medium. Background technique [0002] Currently there are many kinds of coordinate systems. Since different ellipsoids, frames, and epochs are used in different coordinate systems, it is necessary to convert coordinates, for example, convert Xi’an 1980 coordinate system to CGCS2000 (2000 National Geodetic Coordinate System). Traditional coordinate transformation often adopts four-parameter and seven-parameter models. However, the four parameters are only suitable for regional coordinate transformation where the longitude difference and latitude difference are less than 2 degrees, and the seven parameters are only suitable for regional coordinate transformation at the provincial and municipal levels. In recent years, some researchers have also proposed to use the grid correction model to...
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Inventor 符彦王剑辉杨映新韩菲伍素贞
Owner 广东省地质测绘研究院有限公司