Enhanced digital vector map production method with road longitudinal gradient

Abstract

The present invention discloses an enhanced digital vector map production method with a road longitudinal gradient. Firstly, a road is selected, the starting point and end point of the road are determined; through a vehicle which is equipped with a satellite positioning system and a longitudinal acceleration sensor, the state information of the position and vehicle of the road are collected; then latitude and longitude coordinates are converted into plane coordinates, and the positions of the plane coordinates after conversion are taken as the nodes of the road; through a road longitudinal gradient estimation algorithm based on the multi-sensor information, the road longitudinal gradient of each node position is estimated; and finally the node position and longitudinal gradient information are made into an enhanced digital vector map with a longitudinal road gradient by using digital map making software.

Description

technical field [0001] The invention belongs to the field of geographic information systems, and relates to an enhanced digital vector map production method with road longitudinal slope. Background technique [0002] Digital map is to store urban geographic information in a certain format through digitization and present it in the form of a continuous map. It is essentially an urban geographic database. Digital maps can provide a wealth of location-based services, bringing great convenience to people's lives. However, the current digital maps have the following problems: the accuracy of digital maps is low, and it is impossible to further calculate information such as road slopes with high accuracy through existing information; map information is scarce, generally only contains location information, and some important information that people care about For example, information such as road heading, curvature, slope, and height of nearby floors are not included; digital maps...

AI Technical Summary

Problems solved by technology

[0004] The present invention proposes a method for making an enhanced digital vector map with road longitudinal slope, which solves the problem of large workload, complicated process, insufficient precision and lack of longitudinal slope information of the road in the existing digital map has a wide range of applications in the field of active safety)

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