Automatic extraction of road features in urban environments using dense ALS data

Mario Soilán, Linh Truong-Hong, Belén Riveiro, Debra Laefer

Research output: Contribution to journalArticlepeer-review


This paper describes a methodology that automatically extracts semantic information from urban ALS data for urban parameterization and road network definition. First, building façades are segmented from the ground surface by combining knowledge-based information with both voxel and raster data. Next, heuristic rules and unsupervised learning are applied to the ground surface data to distinguish sidewalk and pavement points as a means for curb detection. Then radiometric information was employed for road marking extraction. Using high-density ALS data from Dublin, Ireland, this fully automatic workflow was able to generate a F-score close to 95% for pavement and sidewalk identification with a resolution of 20 cm and better than 80% for road marking detection.

Original languageEnglish (US)
Pages (from-to)226-236
Number of pages11
JournalInternational Journal of Applied Earth Observation and Geoinformation
StatePublished - 2018


  • Airborne laser scanning
  • Pavements classification
  • Point cloud segmentation
  • Urban modelling

ASJC Scopus subject areas

  • Global and Planetary Change
  • Earth-Surface Processes
  • Computers in Earth Sciences
  • Management, Monitoring, Policy and Law


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