StreetMapper                                                                

Mobile mapping using LiDAR technology

Using robust and reliable laser scanning technology coupled with the high precision navigation system TERRAcontrol, IGI and 3D Laser Mapping have joined forces to offer a novel 3D mobile mapping system to scan roads, buildings and trees from a moving vehicle.

Applications

• Highways - For maintenance and asset management of road surface and street furniture
• High load routes - Accurate and rapid mapping of route clearance for transportation of oversize cargos (often known as abnormal indivisible loads)
• Overhead Line Surveys - Wires down to 3mm diameter can be accurately located & heights measured
• Vegetation Mapping - Vegetation & trees accurately measured and cutting parameters created for utilities and arborist contractors
• City Modelling - Rapid data acquisition to enable generation of medium resolution 3D city models

Features Surveying from a moving vehicle at up to 70km/h Relative accuracy: 30mm (point-to-point within the data) Absolute accuracy: 50mm to 1m (depending on GPS quality) Multiple laser scanners for maximum effective pulse rate Easy to use in the field

Two LMS-Q120i scanner arrangement

'Best of class' software for data processing Capable of mapping overhead wires down to 3mm diameter Output directly into GIS Compact and mobile instrumentation for flexible deployment Dedicated support and training centre in UK Point cloud of a village street Benefits Rapid and cost effective deployment (much lower cost to mobilise than an aircraft) Direct 3D positioning and measurements for GIS data High point density means increased resolution and smaller features can be mapped Fast mapping of overhead wire infrastructure with measurements of height over ground and vegetation proximity Low cost data processing workflow using GeoCue and TerraScan Flexible deployment. The system can be used on a high-roof van, 4x4, quad bike or boat.

Technical Overview

The StreetMapper survey system uses well-proven laser scanning technology to capture the position of up to 40,000 3D points per second whilst in motion. The typical positional accuracy is better than 1m and the point-to point accuracy within the data is 30mm.

The system is easy to mobilise and immediately after the survey the data is processed to provide point data with XYZ position and reflective intensity (which can distinguish white lines on the road, for example). Geo-referenced digitial still camera or video are available as options. Further processing of the data allows different features to be extracted according to the individual customers' requirements. The laser scanners use the time of flight method to record distance by determining the time taken for a laser pulse to be reflected back from a target surface. This is a robust and reliable technique that can be used in most weather conditions.

Airborne laser scanners have become widely used over the past decade and are used for power line surveys, flood risk modelling and highway surveys. However, the cost of mobilising an aircraft makes this option expensive for all but the largest survey projects. This makes the StreetMapper a very cost effective survey technique.

Road markings can clearly be seen from laser data

Road markings and bridge modelled from laser data

For more information, please visit the StreetMapper website www.streetmapper.eu.

To download a StreetMapper brochure please click here.

To request a StreetMapper demonstration DVD please email us at info@igi-systems.com.