Experimental survey for the development of the

technology of setting the track to the design

position on the basis of the coordinate method

using laser scanning

12-22.05.2015

Chief of the data processing departmentDmitry Yakushev

Installation the VMZ-400 system on defectoscopy trolley and surveying the railways tracks between stations Selyatino – Dachnaya (12km total). The survey, including primary static and dynamic initialization of the inertial navigation system, occurred in the period 10:40 – 13:15 21.05.2015.

Hybrid Mobile Laser Mapping System Riegl VMZ-400(setup & initialization)

The base station on the top of the Selyatino railway station

The mounting VMZ-400 system on a defectoscopy trolley

Smoothed best estimated trajectory

North/East/Down position errors RMS: 20 – 35mmNumber of satellites at the surveying time

Hybrid Mobile Laser Mapping System Riegl VMZ-400(gathering data & trajectory analysis)

3D point cloud

Photos

The density of the point cloud (speed ~ 1.5km/h)

Hybrid Mobile Laser Mapping System Riegl VMZ-400(results of the preliminary processing)

• The absolute positioning accuracy 20 - 35 mm;

• The relative accuracy (within one scan): 5mm;

• The relative accuracy of two adjacent scans: 10mm;

• The relative accuracy of two flightlines: 30mm;

Hybrid Mobile Laser Mapping System Riegl VMZ-400(results of the post-processing)