HERE Lanes Data Specification

HERE Lanes Compliance Levels

The Lane Model supports multiple compliance levels in the Protocol Buffer format. Currently, five different compliance levels (Spec 1, Spec 2, Spec 3, Spec 4, and Spec 5) are supported. Compliant ranges of lane groups can be tagged with the Specification Compliance Assertion attribute, which can have integer values (1, 2, 3, 4, and 5) corresponding to the compliance levels defined below.

Spec 1

  • With Spec level 1, road segments are marked where lane group connectors are created by such processes as quality control, resulting in coverage of the following features:
    • Lane Count
    • Lane Longitudinal Connectivity
    • Lane Transition Status
    • Lane Direction of Travel
  • The creation process verifies these features against source data.
  • Lane Boundary Geometry is verified against source data utilizing highly accurate source data (e.g. HERE TRUE)
  • The following attribution is verified against source data:
    • Lane Marking Style
    • Lane Access Characteristics (if part of the defined scope)
    • Lane Speed Limit (if part of the defined scope)
    • Lane Types (if part of the defined scope)
  • The following attribution is created automatically utilizing existing SD map features, and might therefore have a lower quality level:
    • For other included attributes, see the Release Notes.

Spec 2

Not published

Spec 3

Not published

Spec 4

  • With Spec level 4, road segments are marked where lane group connectors are created by such processes as quality control, resulting in coverage of the following features:
    • Lane Count
    • Lane Longitudinal Connectivity
    • Lane Transition Status
    • Lane Direction of Travel
  • The creation process verifies these features against source data.
  • Lane Boundary Geometry is verified against source data utilizing highly accurate source data (e.g. HERE TRUE), but will have lower accuracy than Lane Boundary Geometry of Spec 1 due to looser accuracy requirements (and therefore the derived Lane Paths will have lower accuracy as well).
  • The following attribution is verified against source data:
    • Lane Marking Style
    • Lane Types that are part of the Spec 4 spec, as defined in the Release Notes
  • The following attribution is created automatically utilizing existing SD map features, and might therefore have a lower quality level:
    • Other Lane Types.
    • For other included attributes, see the Release Notes.

Spec 5

  • With Spec level 5, road segments are marked where lane group connectors are automatically created based on SD Map topology and attributes, resulting in coverage of the following features:
    • Lane Count
    • Lane Longitudinal Connectivity
    • Lane Transition Status
    • Lane Direction of Travel
  • The creation process does not verify these features against any source data and therefore might have a lower quality level.
  • The width of lanes is based on default country widths.
  • The following attribution is created automatically, and might therefore have a lower quality level:
    • Lane Boundary Geometry and Lane Paths
    • Lane Marking Style
    • Lane Type