Module lane-group

Package com.here.mom.feature.lane.lane-group

Features

Parts

Enums

LaneBoundary

part LaneBoundary

Module lane-group

Property Type Modifier Description
laneBoundaryId integer Lane boundary identifier within a lane group.
geometry LineString Geometry for this lane boundary.

All geometries are 3-dimensional.
parallelElements LaneBoundaryParallelElement list Array of lane boundary elements, ordered left to right according to the lane marking geometry orientation.
laneBoundaryAttributes LaneBoundaryAttributes optional Contains lane boundary attributes.
confidence ConfidenceData optional Confidence values for the lane-boundary
Constraint Expression Description
parallelElementsNonEmpty non-empty(.parallelElements)

LaneBoundaryAttributes

part LaneBoundaryAttributes

Module lane-group

Attributes of lane boundary object.

Property Type Modifier Description
adjacentLaneGroups ParametricLaneGroupReference list An attribute array representing reference to adjacent lane group along range of LaneBoundary.geometry.
laneBoundaryTraversal ParametricLaneBoundaryTraversal list An attribute array representing boundary traversal along range of LaneBoundary.geometry.
roadBoundaryType ParametricRoadBoundaryType list An array representing road boundary type along range of LaneBoundary.geometry when applicable.

This is applicable when the lane boundary is also the road boundary.

The road boundary type comes from the road boundary used to derive the lane group itself.

The parametric ranges should not overlap and are in order. Gaps are acceptable.
centerDivider LaneBoundaryRange list An attribute array representing center dividers along range of LaneBoundary.geometry.

Center Divider indicates that a given range of lane boundary lies between opposing travel directions.

LaneBoundaryParallelElement

part LaneBoundaryParallelElement

Module lane-group

Property Type Modifier Description
sequentialElements LaneBoundarySequentialElement list Sequential elements of parallel lane boundary element.
Constraint Expression Description
sequentialElementsNonEmpty non-empty(.sequentialElements)

LaneBoundaryRange

part LaneBoundaryRange

Module lane-group

Subtypes ParametricLaneBoundaryTraversal, ParametricLaneGroupReference, ParametricRoadBoundaryType

Defines the common attribution for all range based boundary attributes.

Property Type Modifier Description
boundaryRange LinearRange Boundary range is relative to LaneBoundary.geometry.

LaneBoundarySequentialElement

part LaneBoundarySequentialElement

Module lane-group

Property Type Modifier Description
range LinearRange Linear range against lane boundary geometry.
stripeDetail StripeDetail Stripe details boundary element.
laneBoundaryTraversal LaneBoundaryTraversal optional Deprecated. Lane Boundary Traversal describes whether traffic is legally restricted to

move laterally into a legally available adjacent lane, in either or both directions.

New location is LaneBoundary.laneBoundaryAttributes.laneBoundaryTraversal

LaneBoundaryTraversal

enum LaneBoundaryTraversal

Module lane-group

Lane Boundary Traversal attributes.

  • Undefined: Lane Boundary Traversal is not defined.
  • Left: Traffic can change lanes to the left only.
  • Right: Traffic can change lanes to the right only.
  • Both: Traffic can change lanes to the left or right.
  • None: Traffic cannot change lanes.
Value Description
UNDEFINED
LEFT
RIGHT
BOTH
NONE

LaneGroup

feature LaneGroup extends MomFeature

Module lane-group

A LaneGroup is self contained, meaning that lanes and boundaries have been cut so that consumers don't have to perform those operations which require cross domain lookups. All geometries are 3-dimensional.

Property Type Modifier Description
momType "lane.LaneGroup"
id string
bbox BoundingBox optional
geometry Polygon A polygon that represents the lane group boundary geometry, created using the left and right lane group

boundaries.
properties LaneGroupProperties
referencePoint Point optional This is the location of this feature, collapsed to a single point.

This is for any application where an approximate, but deterministic and consistent, location is useful. One

example is deciding where to "anchor" a feature within a tiled map database.

Any Reference to this feature should include this point.
nonSpatialPartitionKey string optional The partition id for a generically partitioned feature.

Generically partitioned features fall into two categories:

1. Features that have a spatial component but may not make sense to partition based on that geometry.

2. Features that don't have a strong spatial component.

How keys will be assigned and what value ranges will be used are not specified.

Examples of generically partitioned features are admin, zone, postal, phonetics, metadata, etc.
Constraint Expression Description
atMostOneDefinedProperty (is-empty(.referencePoint) is-empty(.nonSpatialPartitionKey)) At most one of non-spatial-partition-key and reference-point can be defined.

LaneGroupLane

part LaneGroupLane

Module lane-group

A lane that is part of a lane group. Contains a reference to the original MOM Lane objects this was generated from.

Property Type Modifier Description
drivePathGeometry LineString Drive path geometry, useful for map-matching.
lengthInCm integer Length of the drive path geometry rounded to the nearest centimeter.

Computed in ECEF (Earth-centered, Earth-fixed) after converting from WGS84 (The World Geodetic System 1984)

coordinates.
leftLaneBoundaryId integer References the left-side lane boundary from the parent lane group, relative to the parent lane group

digitization direction.
rightLaneBoundaryId integer References the right-side lane boundary from the parent lane group, relative to the parent lane group

digitization direction.
directionOfTravel DirectionOfTravel Relative to the lane group digitization direction.

Direction of Travel indicates the direction of traffic flow on a navigable lane.
isTransitioning boolean optional Deprecated. Transition status was moved into LaneParametericAttributes object.

Identifies if the lane is in transition?
startLaneConnectorId integer Lane connector identifier at the start of this lane.

This identifier is locally-unique within a lane group connector.

Lane extremities that share the same lane connector id while their corresponding lane group extremities

share the same lane group connector id are connected to each other.
endLaneConnectorId integer Lane connector identifier at the end of this lane.

This identifier is locally-unique within a lane group connector.

Lane extremities that share the same lane connector id while their corresponding lane group extremities

share the same lane group connector id are connected to each other.
roadReferences RoadReference list Road reference mappings for this lane.

The drive path is used as reference geometry for a lane.

Note: Leave this field empty when it is equal to the road references for the lane group.
sourceLaneSegments LaneSegment list A back reference to the original lane segments that were used to create this lane.

Oriented in the lane group digitization direction and sorted from lane start to end.

Needed for change detection.
laneParametericAttributes LaneParametericAttributes (Deprecated) optional Deprecated. Old deprecated attributes, replaced by shared lane-attributes field.

Writer must still populate it until removed, but a reader must also check for the same content.

Same data populated in this structure must be identical as data in lane-attributes.
laneAttributes LaneAttributes optional Parametric attributes of this lane group lane.
Constraint Expression Description
sourceLaneSegmentsNonEmpty non-empty(.sourceLaneSegments)
someAttributesDefined (non-empty(.laneParametericAttributes) non-empty(.laneAttributes))

LaneGroupProperties

part LaneGroupProperties extends Common

Module lane-group

Property Type Modifier Description
@ns:com:here:mom:meta Metadata optional
@ns:com:here:mom:rmob string optional Currently not specified - may be specified by each Feature individually in future
featureType FeatureType optional Deprecated. This property is redundant to MomFeature.momType and should not be used.

MOM clients before 2.6 release had this deprecated property set to required, so

if data needs to be JSON schema validated by clients before 2.6 this property must be

set by the writer.
isoCountryCode Country optional Deprecated. This indicates which country a Feature is in, with a couple caveats.

- It may be unknown ("NONE" is a valid value, in addition to "UNDEFINED" like all MOM enums) simply because the

writer has not tried to figure it out or has otherwise not had the means to do so.

- It may be outright incorrect or a simplification of reality, specifically when a Feature is close to a country

border or in a disputed area (e.g., two or more countries claim the same area).

In all cases, writers and readers of this data should understand that the semantics of this property must be

agreed upon (if it is used at all). The preferred method of relating a Feature to a Country is through a

(direct or transitive) Reference from the Feature to an Admin.
@ns:com:here:mom:delta Branch optional
@ns:com:here:mom:mapcreator MapCreator optional
@ns:com:here:xyz Xyz optional Generic Data Hub namespace
extensionOSM MomOsm optional Optional extension for OSM (Open Street Map) metadata,

in case the object came from OSM
@ns:com:here:groundTruth GroundTruth optional Ground truth namespace
confidence ConfidenceData optional Confidence of a feature, optional only for the features

that are not participating in Quality Index.
referenceGeometry LineString Reference geometry for the lane group, which represents a generalized path useful for map matching, with

generalized curvature and slope.
leftBoundaryGeometry LineString Left side of the bounding geometry for the lane group (in the lane group digitization direction).

This is usually specified by the outermost left lane boundary.

Together with the right boundary geometry, this forms a polygon for the lane group.
rightBoundaryGeometry LineString Right side of the bounding geometry for the lane group (in the lane group digitization direction).

This is usually specified by the outermost right lane boundary.

Together with the left boundary geometry, this forms a polygon for the lane group.
lengthInCm integer Length of the reference geometry rounded to the nearest centimeter.

Computed in ECEF (Earth-centered, Earth-fixed) after converting from WGS84 (The World Geodetic System 1984)

coordinates.
lanes LaneGroupLane list Lanes in this lane group ordered left to right relative to the lane group digitization direction.
laneBoundaries LaneBoundary list Lane boundaries used by the lanes in this lane group. The boundaries are sorted left to right
roadReferences RoadReference list Road reference mappings for this lane group.
incomingLaneGroups LaneGroup list References to other lane groups that are connected to the start of this lane group.
outgoingLaneGroups LaneGroup list References to other lane groups that are connected to the end of this lane group.
startLaneGroupConnectorId long Lane group connector id at the start of this lane group (in the digitization direction).

Lane groups that share the same lane group connector id are connected.

Incoming lane groups will share the same lane group connector id, either at their start or end depending on

relative orientation.

Note: lane group connector ids are globally unique.
endLaneGroupConnectorId long Lane group connector id (globally unique) at the end of this lane group (in the digitization direction).

Lane groups that share the same lane group connector id are connected.

Outgoing lane groups will share the same lane group connector id, either at their start or end depending on

relative orientation.

Note: lane group connector ids are globally unique.
Constraint Expression Description
lanesNonEmpty non-empty(.lanes)
laneBoundariesMinSize2 (size(.laneBoundaries) >= 2)
roadReferencesNonEmpty non-empty(.roadReferences)

LaneParametericAttributes (Deprecated)

part LaneParametericAttributes (Deprecated)

Module lane-group

A lane group lane parametric attributes. All attributes from this property are part of new lane-attribute property, attribute names are slightly different. Attributes are parametrized along LaneGroupLane.DrivePathGeometry

Property Type Modifier Description
laneWidthProfile LaneWidthProfile Deprecated. A width profile of this lane group lane.
parametricLaneType LaneTypeInfo list Deprecated. Array of parametric lane type attribute for this lane group lane.

Deprecated, new location is inside extended schema lane-attributes.lane-types
parametricTransitionStatus ParametricTransitionStatus (Deprecated) list Deprecated. An attribute array representing parametric transition status along lane group lane.

Deprecated, new location is inside extended schema lane-attributes.transitions
parametricSpeedLimit SpeedLimitInfo list Deprecated. An attribute array representing parametric lane speed limit information along lane group lane.

Deprecated, new location is inside extended schema lane-attributes.speed-limits
parametricAccessCharacteristics LaneAccessCharacteristicInfo list Deprecated. An attribute array representing parametric lane access characteristic information along lane group lane.

Deprecated, new location is inside extended schema lane-attributes.lane-accesses
parametricStoppingLocation PointAttributeInfo list Deprecated. An attribute array representing Stopping location positions as parametric lane points along lane group lane.

Deprecated, new location is inside extended schema lane-attributes.stop-locations

LaneSegment

part LaneSegment

Module lane-group

Property Type Modifier Description
lane Lane Reference to MOM Lane.
range LinearRange The linear range on the referenced lane.

ParametricLaneBoundaryTraversal

part ParametricLaneBoundaryTraversal extends LaneBoundaryRange

Module lane-group

Attribute representing boundary traversal along parametric range of LaneBoundary.geometry.

Property Type Modifier Description
boundaryRange LinearRange Boundary range is relative to LaneBoundary.geometry.
laneBoundaryTraversal LaneBoundaryTraversal This attribute of the Lane Boundary describes whether traffic is legally restricted to

move laterally into a legally available adjacent lane, in either or both directions.

This attribute is only required when the adjacent lane is available for use:

it indicates if this is a location where a lateral lane change is not allowed.

For example, an HOV lane may be adjacent to a general traffic lane.

At some locations, boundary markings indicate that lane change is prohibited;

at other locations, boundary markings indicate that lane change is allowed.

Lane Traversal is not used to indicate that the adjacent lane is unavailable for use;

that would be indicated by attributes on the adjacent lane, such as travel direction or access characteristics.

ParametricLaneGroupReference

part ParametricLaneGroupReference extends LaneBoundaryRange

Module lane-group

Parametric attribute along LaneBoundary.geometry pointing to a lane group object.

Property Type Modifier Description
boundaryRange LinearRange Boundary range is relative to LaneBoundary.geometry.
laneGroupRef LaneGroup Mom reference to lane group.

ParametricRoadBoundaryType

part ParametricRoadBoundaryType extends LaneBoundaryRange

Module lane-group

Parametric Road Boundary Type along LaneBoundary.geometry pointing to a Road Boundary type when applicable.

Property Type Modifier Description
boundaryRange LinearRange Boundary range is relative to LaneBoundary.geometry.
roadBoundaryType RoadBoundaryType Road Boundary Type of the parent boundary if applicable

ParametricTransitionStatus (Deprecated)

part ParametricTransitionStatus (Deprecated) extends AttributeInfo

Module lane-group

Parametric attribute for transition status extending AtttributeInfo with LinearRange.

Property Type Modifier Description
laneRange LinearRange Linear Range restricts the applicability of an attribute to the range between startOffset and endOffset of

a feature.

Lane Range defines the start and end offset of a lane within which it restricts the applicability of an attribute.
confidence ConfidenceData optional Confidence values for an attribute
transitionStatus TransitionType Represents the topology change due to a lane splitting into multiple lanes, multiple lanes merging together

into one lane, or no transitioning present.

RoadReference

part RoadReference

Module lane-group

Property Type Modifier Description
sourceRange LinearRange Linear range against the reference geometry of referenced entity (lane or lane group).
roadTopologySegmentRef Road optional Reference to a road link. This attribute was mandatory to till Mom 2.7.

For backward compatibility this attribute has to be set for the consumers that are based on earlier than 2.7 Mom.
roadTopologySegmentRange LinearRange optional Linear range on a road link.
topologySegmentRef Topology optional Reference to a topology segment.
topologySegmentRange LinearRange optional Linear range on a topology segment.

results matching ""

    No results matching ""