Constructing Road Geometry
First Claim
1. A machine readable medium storing a program for execution by at least one processing unit, the program comprising sets of instructions for:
- generating an initial set of geometries for a road graph defined for a map region, the road graph comprising a plurality of road segments and junctions aggregated into roads;
identifying an overlap between a first geometry of a first road segment and a second geometry of a second road segment, wherein the first road segment and the second road segment are parts of different roads and do not meet at a junction; and
automatically modifying at least one of the first and second geometries in order to prevent the first geometry and second geometry from overlapping.
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Accused Products
Abstract
Some embodiments provide a method for a mapping service. The method generates an initial set of geometries for a road graph defined for a map region. The road graph includes several road segments and junctions aggregated into roads. The method identifies an overlap between a first geometry of a first road segment and a second geometry of a second road segment. The first road segment and the second road segment are parts of different roads and do not meet at a junction. The method automatically modifies at least one of the first and second geometries in order to prevent the first geometry and second geometry from overlapping. In some embodiments each geometry is defined by a set of vertices that specify its boundaries. The method of some embodiments automatically modifies the vertices of at least one of the first and second geometries.
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Citations
22 Claims
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1. A machine readable medium storing a program for execution by at least one processing unit, the program comprising sets of instructions for:
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generating an initial set of geometries for a road graph defined for a map region, the road graph comprising a plurality of road segments and junctions aggregated into roads; identifying an overlap between a first geometry of a first road segment and a second geometry of a second road segment, wherein the first road segment and the second road segment are parts of different roads and do not meet at a junction; and automatically modifying at least one of the first and second geometries in order to prevent the first geometry and second geometry from overlapping. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. For a mapping service, a method comprising:
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receiving a road graph for a map region, the road graph comprising (i) a plurality of road segments aggregated into roads and (ii) a plurality of junctions at which two or more road segments intersect; generating an initial set of geometries for the road segments in the road graph, each geometry defined by a set of vertices that specify boundaries of the geometry; determining that a first geometry for a first road segment and a second geometry for a second road segment overlap based on locations of the vertices of the first geometry and the vertices of the second geometry, wherein the first road segment and the second road segment do not share a junction; and automatically modifying the vertices of at least one of the first and second geometries in order to remove the overlap. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A machine readable medium storing a program for execution by at least one processing unit, the program comprising sets of instructions for:
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receiving a road graph for a map region, the road graph comprising a plurality of road segments and junctions of road segments aggregated into roads; generating geometries for the road segments in the road graph; generating lane marking geometries for a plurality of the road segments based on at least one attribute of the road segment; and for at least one junction between a first road segment and a second road segment, automatically generating intersection marking geometries for the juncture. - View Dependent Claims (19, 20, 21, 22)
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Specification