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Multi-sensor approach to map the center line of a railway track

Shankar, Sangeetha (2018) Multi-sensor approach to map the center line of a railway track. Master's, Westfälische Wilhelms-Universität Münster.

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Geodatasets on railway infrastructure are useful assets in the transportation sector for routing applications and planning construction and maintenance activities. Though some datasets on railway infrastructure exist, they do not cover all places. The current work focuses on automatic digitalisation of the center line of the railway tracks using three sensors: a Global Navigation Satellite System (GNSS) receiver, an Inertial Measurement Unit (IMU) and a Laser Scanner mounted on a vehicle. Three methods that use the data from these sensors were developed: Conditional Selection of GNSS points, Kalman Filter Framework for combining GNSS and IMU data and Extraction of center line of railway tracks from georeferenced Laser Scanner Point Cloud. The center lines were generated from a test dataset by following six different combinations of these three methods. The test dataset consisted of data collected using these three sensors mounted on a measurement platform that moved ten times on a track over a length of 33 km. The results were compared using reference data digitised from the Aerial Images available in the Geodata Portal of Saxony. It was found that the combination of Conditional Selection of GNSS data points and the Kalman Filter Framework gave the best results for the track on which the measurement platform had moved. On an average, 99.91% of the track was digitalised and the mean perpendicular distance of the track from the reference line was 1.49 meters. For the other parallel tracks in the test area, the results from the combination of all the three methods and the combination of the second and third methods gave the best results. On an average, 71.38% of the first parallel tracks and 11.75% of the second parallel tracks were automatically digitalised.

Item URL in elib:https://elib.dlr.de/122482/
Document Type:Thesis (Master's)
Title:Multi-sensor approach to map the center line of a railway track
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Date:24 October 2018
Refereed publication:Yes
Open Access:No
Number of Pages:60
Keywords:Digital Map; Laser Scanner; Data Fusion; Kalman Filter; GNSS; IMU
Institution:Westfälische Wilhelms-Universität Münster
Department:Institut für Geoinformatik
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Traffic Management (old)
DLR - Research area:Transport
DLR - Program:V VM - Verkehrsmanagement
DLR - Research theme (Project):V - TrackScan (old)
Location: Braunschweig
Institutes and Institutions:Institute of Transportation Systems > Data Management and Knowledge Discovery
Deposited By: Schubert, Lucas Andreas
Deposited On:29 Oct 2018 08:45
Last Modified:28 Apr 2020 13:17

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