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Road network generation

  • US 10,452,810 B2
  • Filed: 09/29/2015
  • Issued: 10/22/2019
  • Est. Priority Date: 09/30/2014
  • Status: Active Grant
First Claim
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1. A method, comprising:

  • aggregating a plurality of grid cells partitioned in advance on a trajectory map based on trajectories in each grid cell of the plurality of grid cells to form level-1 regions, where the trajectories comprise routes traveled by vehicles, and wherein each trajectory of the trajectories is represented as a sequence of position points on the trajectory map;

    generating a link of a road network by merging a level-1 region having two valid neighbors with its neighbor level-1 regions having two valid neighbors, wherein a level-1 region B is called a valid neighbor of a level-1 region A when it satisfies the following conditions;

    the level-1 region B is a neighbor level-1 region of the level-1 region A; and

    the level-1 region B has at least one neighbor level-1 region, in addition to the level-1 region A, which is not a neighbor level-1 region of the level-1 region A;

    generating a node of the road network by merging a level-1 region having three or more valid neighbors with its neighbor level-1 regions having three or more valid neighbors;

    constructing a map of the road network using the link and the node, wherein the link corresponds to a road segment on the map and the node corresponds to a meeting point of at least two road segments on the map; and

    representing a trajectory of the trajectories by replacing the sequence of position points with a set containing at least one of;

    the link and the node.

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