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Road height generation for a road network

  • US 9,207,094 B2
  • Filed: 08/31/2012
  • Issued: 12/08/2015
  • Est. Priority Date: 06/10/2012
  • Status: Active Grant
First Claim
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1. A method for generating road height values for a road network area that includes a plurality of junctions, the method comprising:

  • receiving, by a computing device, a data set for each junction in the road network area, wherein each data set includes a road designation, a first coordinate, a second coordinate, and a stacking order for each road of a respective junction, wherein the plurality of junctions include a plurality of grade separated crossings, a grade separated crossing including at least two roads having a different stacking order signifying that the at least two roads have different heights;

    determining, by the computing device, height variables that provide an optimal value for a cost function based on the road data set for each junction, wherein height values of roads of a grade separated crossing are constrained;

    to satisfy the stacking order of each road in the junction, andto have a minimum distance between roads having consecutive stacking order values, wherein, for each of the plurality of junctions, a height separation between the junction and all of its neighboring junctions is minimized in the cost function; and

    transmitting, from the computing device to a display, data based on the height values for displaying, by the display, a three-dimensional map of a part of the road network area using the height values.

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