Method and device for determining road elevation

Abstract

The invention discloses a method and a device for determining road elevation. The method comprises the steps that for each gland point, the elevation of an upper-layer road is determined according tothe sum of the elevation of a lower-layer road at the gland point and the preset height difference, and the elevation of each road is obtained; wherein the cover pressing points are intersection points of the upper-layer road and the lower-layer road which have a cover pressing relationship on a two-dimensional plane; according to the elevation of each road, a judgment is made that the height difference between the upper-layer road and the lower-layer road at each gland point, and a judgment is made as to whether the height difference meets the preset height difference or not; if not, the elevation of the upper road is re-determined; wherein the height difference between the upper-layer road and the lower-layer road corresponding to all the re-determined gland points meets the preset height difference. The elevation of each road can be reasonably simulated, and three-dimensional display of each road is realized; meanwhile, the data acquisition cost is low, and the updating real-time performance is high.

Description

technical field [0001] The invention relates to the technical field of electronic maps, in particular to a method and device for determining road elevation. Background technique [0002] With the increasing development of urban traffic roads, more and more elevated roads are being built. Since two-dimensional electronic maps cannot directly display the spatial distribution and positional relationship of elevated roads, existing applications have more and more demands for three-dimensional maps. [0003] The inventors found that most of the current two-dimensional electronic maps are processed based on Global Positioning System (Global Positioning System, GPS) data, and the elevation data obtained only through GPS data has large errors and cannot be used directly. Although the map data collected by high-precision map collection vehicles has high precision and can meet the requirements of 3D maps, it cannot be collected on a large scale due to its high collection cost. [000...

AI Technical Summary

Problems solved by technology

[0003] The inventor found that most of the current two-dimensional electronic maps are processed based on Global Positioning System (Global Positioning System, GPS) data, and the elevation data obtained only through GPS data has large errors and cannot be used directly

Although the map data collected by high-precision map collection vehicles has high precision and can meet the requirements of 3D maps, it cannot be collected on a large scale due to its high collection cost.

[0004] It can be seen that the existing technology has the technical problems of low accuracy or high cost in determining the elevation

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