Method and device for drawing road in electronic map, drawing equipment and storage medium

Abstract

The embodiment of the invention provides a method and device for drawing a road in an electronic map, drawing equipment and a storage medium, and the method comprises the steps: carrying out the linear fitting of collected road shape point data, and obtaining a curve coefficient and a starting point coordinate of a curve corresponding to the road; substituting the obtained curve coefficient and the starting point coordinate of the curve corresponding to the road into an equation of a relaxation curve of the road, and rendering to obtain the relaxation curve of the road; wherein the relaxationcurve of the road is obtained by deformation of a unit convolution curve, an equation of the relaxation curve of the road is expressed as a correlation between the unit convolution curve and a corresponding deformation coefficient, and a preset relation exists between the deformation coefficient and a curve coefficient of a curve corresponding to the road. By adopting the scheme, the precision stability of the road relaxation curve and the smoothness of the line shape in the electronic map can be improved.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of electronic maps, and in particular, relate to a method and device for drawing roads in an electronic map, a drawing device, and a storage medium. Background technique [0002] The road plane line is composed of a series of route units, including straight lines, circular curves, transitional curves, and quadratic parabolas. A transitional curve is a curve with a continuously changing curvature set between a straight line and a circular curve or between two circular curves with a large radius difference. "Technical Standards for Highway Engineering" (JTG B01-2003) stipulates that, except for Class 4 roads, which may not have transitional curves, other roads at all levels shall have transitional curves. On modern highways, sometimes the proportion of transitional curves exceeds that of straight lines and circular curves, and becomes the main component of the plane alignment. On urban ...

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Problems solved by technology

[0004] However, the road transition curve in the electronic map drawn by the above method has the problems of unstable accuracy and not smooth enough line, especially when the map is enlarged and displayed, the problem of not smooth enough line is more prominent

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