Next Article in Journal
Early Detection and Quantification of Verticillium Wilt in Olive Using Hyperspectral and Thermal Imagery over Large Areas
Next Article in Special Issue
Empirical Radiometric Normalization of Road Points from Terrestrial Mobile Lidar System
Previous Article in Journal
National Forest Aboveground Biomass Mapping from ICESat/GLAS Data and MODIS Imagery in China
Previous Article in Special Issue
Shiftable Leading Point Method for High Accuracy Registration of Airborne and Terrestrial LiDAR Data
Open AccessArticle

Automatic Extraction of Railroad Centerlines from Mobile Laser Scanning Data

1
Faculty of Geo-Information Science and Earth Observation, University of Twente, P.O. Box 217, 7514 AE Enschede, The Netherlands
2
Department of Infrastructure Engineering, University of Melbourne, Melbourne 3010, Australia
*
Author to whom correspondence should be addressed.
Academic Editors: Juha Hyyppä and Prasad S. Thenkabail
Remote Sens. 2015, 7(5), 5565-5583; https://doi.org/10.3390/rs70505565
Received: 13 March 2015 / Revised: 17 April 2015 / Accepted: 24 April 2015 / Published: 4 May 2015
(This article belongs to the Special Issue Lidar/Laser Scanning in Urban Environments)
In this paper, we describe the automatic extraction of centerlines of railroads. Mobile Laser Scanning systems are able to capture the 3D environment of the rail tracks with a high level of detail. Our approach first detects laser points that were reflected by the rail tracks, by making use of local properties such as parallelism and height in relation to neighboring objects. In the modeling stage, we present two approaches to determine the centerline location. The first approach generates center points in a data-driven manner by projecting rail track points to the parallel track, and taking the midpoint as initial center point. Next, a piecewise linear function is fitted through the center points to generate center points at a regular interval. The second approach models the rail track by fitting piecewise 3D track models to the rail track points. The model consists of a pair of two parallel rail tracks. The fitted pieces are smoothened by a Fourier series interpolation function. After that the centerline is implicitly determined by the geometric center of the pair of tracks. Reference data has been used to analyze the quality of our results, confirming that the position of the centerlines can be determined with an accuracy of 2–3 cm. View Full-Text
Keywords: mobile laser scanning; point clouds; railway; detection; centerline; 3D modeling; stochastic model fitting; rail tracks mobile laser scanning; point clouds; railway; detection; centerline; 3D modeling; stochastic model fitting; rail tracks
Show Figures

Graphical abstract

MDPI and ACS Style

Elberink, S.O.; Khoshelham, K. Automatic Extraction of Railroad Centerlines from Mobile Laser Scanning Data. Remote Sens. 2015, 7, 5565-5583.

Show more citation formats Show less citations formats

Article Access Map by Country/Region

1
Only visits after 24 November 2015 are recorded.
Back to TopTop