RIEGL VMZ
hybrid mobile mapping system
Overtaking Static Surveying
Tan Nguyen, RIEGL
George Liu, Absolute Space
AGENDA
» Introduction to Mobile Laser Scanning
» Introduction to Static Laser Scanning
» The Hybrid System
» Typical Applications
» Sample Project -Vancouver
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Mobile Laser Scanning
Typ. mobile laser scanning (MLS)
• kinematic scanning
• usually one or two 2D laser scanners
• position information via IMU/GNSS
solution (Inertial Measurement Unit)
• 3rd dimension by moving platform
• highly efficient data acquisition
• Cost
mounting
platform
IMU
GNSS
receiver
fully-calibrated
Measuring Head
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Mobile Laser Scanning
operator’s
workstation
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compact and transportable:
Control Unit
quick setup:
Measuring Head
RIEGL
software
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VMX-450 Miami Transit Tunnel
Single pass
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VMX-450 Single Pass
Cross section
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Static Laser Scanning
Typ. terrestrial laser scanning (TLS)
• static scanning
• 3D laser scanner mounted on a tripod
• position information via GPS and/or
ground control points
• high-resolution
• high-accuracy
• Cost
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Static Laser Scanning
• Schematic build-up of the 3D scanners VZ-400, VZ-1000 and VZ-2000
rotating mirror wheel
laser deflection in vertical
(line) direction
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vertical field of view
100 deg (-40/+60 deg)
field of view in 3D mode
rotation of scan-head (360°)
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Static Laser Scanning
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VMZ-2000 hybrid mobile mapping system
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ONE system for terrestrial AND mobile scanning
Compatible with VZ-400, VZ-1000 and VZ-2000 3D scanners
Flexible mounting platform
Multiple scanning modes and positons
Easy installation
Cost
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VMZ System Assembly
Nikon Camera
Further Camera Systems,
e.g. LadyBug Panoramic
Camera
VZ-400/1000/2000
Adapter Plate
IMU/GNSS Unit
Single Laptop for System
Operation
RIEGL VMZ
Vertical Mount
RIEGL VMZ
Horizontal Mount
Distance Measurement
Indicator (DMI)
Standard Roof Bars
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Optional Camera Systems
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Image data acquisition with a calibrated and
GPS synchronized NIKON® DSLR camera
NIKON D800 / 36MPix sensor
CMOS sensor 35.9mm x 24mm
Frame Rate
up to 3 fps
Exposure
0.125 ms to 30 sec
Field of View
114° in horizontal, 14 mm lens
Additionally panoramic camera systems such as
POINT GREY Ladybug® are available
LadyBug 5 / 30MPix sensor
6 x 5MP sensors, 2/3” color CCD
Frame Rate
up to 9 fps
Exposure
0.02ms to 2 sec
Field of View
90% of full sphere
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VMZ Scan Modes
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2D line scan mode
– user definable horizontal angle of the scanning head
– efficient side scanning
– dense point cloud pattern with high resolution
– vertical and horizontal scanner setup
vertical setup
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3D mode (radar mode)
– continuously rotating scan head
– 360° overview scans
– matching for non-overlapping 2D line scans
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vertical & horizontal setup
– efficient profile scanning
horizontal setup
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VMZ Technical Data
NEW
Scanner Performance
VZ-400
VZ-1000
VZ-2000
Eye Safety Class
Laser Class 1
Laser Class 1
Laser Class 1
Max. Range @ Target Reflectivity 90% / 20%
600 m / 280 m
1400 m /700 m
2050 m / 1050 m
Minimum Range
1.5 m
2.5 m
2.5 m
Accuracy / Precision
5 mm / 3 mm
8 mm / 5 mm
8 mm / 5 mm
Effective Measurement Rate
up to 122,000 meas./sec
up to 122,000 meas./sec
up to 400,000 meas./sec
Max. Lines per Second (lps)
120 lps
120 lps
240 lps
Scan Angle Range – Vertical (Line) Scan
total 100° (+60° / -40°)
total 100° (+60° / -40°)
total 100° (+60° / -40°)
Scan Angle Range – Horizontal (Frame) Scan
max. 360°
max. 360°
max. 360°
Max. Frame Angle per Second
60 deg/sec
60 deg/sec
150 deg/sec
IMU/GNSS Performance
Position Accuracy (absolute)
typ. 20 – 50 mm
Roll & Pitch / Heading Accuracy
0.015° / 0.050°
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Best Practice for VMZ
VMZ / 2 passes: vertical 2D line
mode @ 90°/270° frame angle
VMZ / 1 pass in 3D radar mode
VMZ / 3 passes: 2 vertical and
1 radar mode
3D view: Comparison of scan pattern, line density as well as capability of object detection (road surface, house walls, traffic signs)
dependent on different scan modes and the number of passes. Images are colored by reflectance.
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VMZ Applications
Shore Surveying and Marine Applications
 Costal Survey
 Offshore rig surveying
 Beach Survey
City Modeling
 City planning
 Architecture
 Sign Inventory
 Heritage Preservation
Other Applications
 Road Pavement Assessment Management
 Powerline Transmission Surveying
 Construction Management
 Airport Runway Surveying
 As Built and Design Built
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VMZ Application Examples
GIS Mapping and Asset Management
 geo-referenced high resolution imagery
 requirements on moderate point cloud density
 highly-efficient kinematic large scale data acquisition
 possibility for static high resolution 3D scans in restricted areas of interest
 vegetation management benefits by the waveform and multi-target capability
of the scanner
Surveying in Open-Pit Mining
 effective quantity surveying for large surface mining areas
 consideration of safety regulations and survey possibilities without a shutdown
of production
 well suited scan line pattern to capture natural matters and randomly oriented
fissures
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Sample project - Vancouver, BC
Project Attribute:
 LiDAR System –RIEGL VMZ-1000 with integrated Nikon D800 DLSR camera
 Vehicle – 2012 Honda Odyssey
 Location – Vancouver, BC (West Broadway between Yukon St. and Granville St.)
 Road Distance – 2.8 kilometres
 Data Acquisition Distance – Approximately 17 kilometres
 Line Mode, Scan Angle – (60deg, 90deg, 120deg, 240deg, 270deg, 300deg)
 Duration – 3hrs (During Rush Hours)
 Software – RiAcquire, RiProcess, RiWorld, RiPrecision
 Processing Time – 4 hours
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VMZ in Mobile Mode
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VMZ in Mobile Mode
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Classificatation and filtering tool
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Classificatation and filtering tool
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VMZ in Tripod Mode – Lion Gate Bridge
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VMZ – Unique Selling Proposition
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one system for 3D terrestrial and kinematic data acquisition
modular design
 “Plug & Play” IMU/GNSS upgrade to mobilize VZ scanners
 easy integration of camera systems
 TLS use without limitation in functionality and flexibility
 minor investment risk
 diversified field of application TLS and MLS
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high flexibility
 switch between kinematic and terrestrial setup without system recalibration
 Easy mounting on any vehicle type
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seamless RIEGL workflow for MLS and TLS data acquisition and post-processing
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Thank you!