Electronic map generation method and device

Abstract

The invention provides an E-map generation method and device and belongs to the field of E-map data. The method includes: decomposing a polygon in the original map data into at least one arc segment and recording a composition relation between the polygon and the arc segments; performing shape point simplification on the arc segments according to a required scale so as to obtain broken segments corresponding to the arc segments; forming a novel polygon out of the broken segments according to the recorded composition relation. According to the technical scheme, a multi-scale E-map can be generated on the basis of large-scale map data, and the generated E-map is higher in equality.

Description

technical field [0001] The invention relates to the field of electronic map data, in particular to a method and device for generating an electronic map. Background technique [0002] In the existing production technology of navigation data in the industry, large-scale maps have sufficiently rich and dense polygonal surface elements. In order to display polygonal surface elements in small-scale maps, it needs to be comprehensively processed. At present, most of the industry adopts the following methods: ways: [0003] 1. Do not comprehensively process the polygonal surface elements, and directly use the polygonal surface elements with dense shape points applicable in the large-scale map for use in the small-scale map; [0004] 2. Use artificial methods to carry out comprehensive processing, extract the shape feature points of the original polygon, and reduce the number of shape points, control the generation of topological cracks through manual maintenance, and carry out car...

AI Technical Summary

Problems solved by technology

[0006] In the first comprehensive processing method, since the polygonal surface elements are not simplified, the redundancy of shape point data will be too large, which will not only occupy too much storage space, but also lead to low map drawing efficiency

[0007] In the second comprehensive processing method, due to the manual processing, there are several disadvantages as follows: First, the manual inspection workload is huge and the cost is high; second, different people have different inspection effects and are not repeatable; It is difficult to carry out quality control; Fourth, it is prone to manual misoperation and data errors

[0008] In the third synthesis method, the current automated procedure may result in topological cracks between the synthesized polygons

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