Spring-mounted Zebedee maps Pisa tower in 3D

16 October 2013
By Lorna Sharpe
Mobile version
Share |
Image created from CSIRO’s scan of the Leaning Tower of Pisa

Image created from CSIRO’s scan of the Leaning Tower of Pisa

Australian researchers have created a 3D interior map of Italy’s famous Leaning Tower of Pisa by using a breakthrough mobile laser mapping system.

The work will contribute to preserving the cultural heritage of the site.

Developed by the CSIRO, Australia’s national science agency, the Zebedee technology is a handheld 3D mapping system incorporating a laser scanner that sways on a spring to capture millions of detailed measurements of a site as fast as an operator can walk through it. Specialised software then converts the system’s laser data into a detailed 3D map.

While the tower’s complex architecture has prevented previous mapping technologies from capturing its interior, Zebedee has enabled researchers to create the first comprehensive 3D map of the entire building.

“It can often take a whole research team a number of days or weeks to map a site with the accuracy and detail of what we can produce in a few hours,” said Dr Jonathan Roberts, research programme leader at CSIRO’s Computational Informatics Division.

“Within 20 minutes we were able to use Zebedee to complete an entire scan of the building’s interior. This allowed us to create a uniquely comprehensive and accurate 3D map of the tower’s structure and composition, including small details in the stairs and stonework.”

Zebedee’s primary sensing technology is lidar, in which an infrared laser measures ranges to surfaces in the environment. The system’s distinguishing feature is that the laser scanner is mounted on a spring, which converts the natural motions of the operator into a sweeping motion of the scanner, giving a wide field of view.

A low-cost inertial sensor provides rough measurements of the spring’s rotations. Specially developed software can convert the raw range and inertial measurements into a 3D map in less time than it takes to collect the data. The maps are represented as point clouds, millions of points expressed in a common coordinate frame.

The CSIRO team collaborated on the Pisa project with local Italian scientists from Scuola Superiore Sant’Anna.

“Our detailed record of the Leaning Tower of Pisa may one day be critical in being able to reconstruct the site if it was to suffer catastrophic damage due to natural disasters,” said Franco Tecchia, assistant professor at the SSSA’s Perceptual Robotics lab, PERCRO.

Latest Issue

E&T cover image 1607

"As the dust settles after the referendum result, we consider what happens next. We also look forward to an international summer of sport."

E&T jobs

  • Design Delivery Leader, Palace of Westminster Restoration & Renewal (R&R) - Engineering Lead

    House of Commons
    • City of Westminster, London (Greater)
    • Circa £65,000 (There may be more for an exceptional candidate)

    You will lead on a number of engineering infrastructure and associated workstreams under direction from the Deputy Director

    • Recruiter: House of Commons

    Apply for this job

  • Senior Engineer, Network Equipment

    Energy Networks Association
    • Westminster
    • £49-58k per annum, dependent on experience

    Manage issues and working groups relating to all types of equipment and assets used on the UK Transmission and Distribution Networks.

    • Recruiter: Energy Networks Association

    Apply for this job

  • Programme Manager, Network Resilience

    Energy Networks Association
    • Westminster
    • Competitive salary, dependent on experience

    Co-ordinate the network resilience, emergency planning and the Single Electricity Number (SEN) work in the ENA Engineering team.

    • Recruiter: Energy Networks Association

    Apply for this job

  • Assistant Professor (Tenure Track) of Smart Building Solutions

    Premium job

    ETH Zurich
    • Zurich, Canton of Zürich (CH)

    The successful candidate is expected to develop a strong and visible research programme in the area of control and diagnostics of building systems

    • Recruiter: ETH Zurich

    Apply for this job

  • Process Controls Leader

    Premium job

    Phillips 66
    • Humber Refinery, South Killingholme, North Lincolnshire DN40 3DW
    • £60k - 75k plus extensive Compensation and benefits package, dependent upon experience

    Experienced Process Control Leader providing leadership and technical support for Oil Refinery. Extensive Compensation and benefits package.

    • Recruiter: Phillips 66

    Apply for this job

  • Regional Technical Support Manager

    Premium job

    Siemens
    • Warwick, Warwickshire

    You will be required to lead the regional Customer Services strategy and resources to maximise Customer satisfaction.

    • Recruiter: Siemens

    Apply for this job

  • Communications Engineer

    BAE Systems
    • England, Hampshire, Portsmouth
    • Negotiable

    Communications Engineer Would you like to play a key role supporting the UK's Maritime Communications Infrastructure? We currently have a vacancy for a Communications Engineer at our site in Portsmouth. As a Communications Engineer, you will be carrying o

    • Recruiter: BAE Systems

    Apply for this job

  • MetOp-SG Receiver Project Manager

    Science and Technology Facilities Council (STFC)
    • STFC Rutherford Appleton Laboratory, Harwell, Oxfordshire
    • £37,213 - £50,926 (depending on experience)

    Project Manager to oversee the development, production and test of spaceflight components and integrated receiver systems

    • Recruiter: Science and Technology Facilities Council (STFC)

    Apply for this job

  • Financial Controller

    MBDA
    • Stevenage
    • Competitive Salary & Benefits

    An opportunity has arisen to manage a diverse range of financial controlling activities within the Equipment Team (ET) and newly Centres of Excellence (CofEx) function...

    • Recruiter: MBDA

    Apply for this job

  • Weapon System Product Support Manager

    MBDA
    • Stevenage
    • Competitive Salary & Benefits

    The Opportunity An opportunity has arisen within MBDA?s Customer Support & Services organisation for a strong competent leader to deliver a key Weapon capability primarily...

    • Recruiter: MBDA

    Apply for this job

More jobs ▶

Subscribe

Choose the way you would like to access the latest news and developments in your field.

Subscribe to E&T