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Polylines & Lanes services · 06 / 10

Polylines & Lanes

Lane markings, curbs, wires and edges traced as ordered lines.

Linear structures need ordered, smooth geometry rather than boxes. We trace lanes, road edges, cables and seams with consistent direction and attributes such as dashed, solid or occluded.

Typical use cases

  • Lane detection
  • HD map building
  • Power line inspection
  • Crack detection

Variants

A

Lane lines

Type, colour and visibility attributes per segment.

B

Edges & boundaries

Curbs, road edges and drivable-area boundaries.

C

Infrastructure

Power lines, pipes and cracks in inspection imagery.

QA metric

Mean point distance

≤ 3px

Measured against gold traces at fixed sampling.

Export formats

  • CULane
  • TuSimple JSON
  • GeoJSON
  • CVAT XML

How every project runs

  1. Scope call & sample review
  2. Written guideline & gold set
  3. Fixed-fee pilot with QA report
  4. Production in weekly batches
Read the full process →

Next step

Scope your project with
an annotation lead.

A 30-minute call with the person who would run your project. We review a sample of your data, recommend an approach and send a fixed-price proposal within two business days.

Book a scoping call → or email services@nextribes.com