How digitalization ensures optimization of city development and infrastructure

Mobile Laser scanning is a unique technological advancement for alle major structural engineering and building projects. Particularly when it is applied to collect data as a basis for planning and design of large-scale projects.

Aalborg Municipality were able to save a full year’s work and DKK 1 million in the pre-survey of a large infrastructure project.

A public digital facility asset register will contribute by reducing annual damages to cables and utility pipes amounting to DDK 150-200 million.

Albertslund Municipality have digitally registered all road assets e.g. signs, bicycle racks, benches and waste dispensers in order to schedule replacement, day-to-day operations and maintenance.

These are all examples of how digitalization and the use of geodata can be utilized to develop the cities and infrastructure of tomorrow.

New opportunities with mobile laser scanning (MLS) 

Mobile laser scanning is a new surveying method ideal for mobile mapping of infrastructure eg. roads, structures, signposts, lampposts, utilities, road marking and maintenance and drainage control.

Last summer, Aalborg Municipality had a proposed new BRT-bus alignments including  central city quarters scanned using the new technology. Each building, hedge, curb and road were mapped out to create a precise 3D model, which was subsequently used to plan an extensive Bus Rapid Transit (BRT) project.

The mobile scanner was mounted on an enabling 11,3 kilometers of road to be scanned in the course of two hours. The scanner registered everything, including the exact geographical location of road markings, the height of above-hanging tree branches and the width of bicycle paths etc.

With a mobile laser scanner mounted on the car, Mølbak Landinspektører scanned an 11,3 kilometers of road  for Aalborg Municipality last summer in only two hours collecting one million points every second.
(Foto: © Lars Horn / Baghuset)

One year’s work completed in a few days

The collection of data constitutes the foundation for one of the biggest structural engineering projects in Aalborg to this date. The BRT project will function similarly to subways or light rails in other cities and it will ensure that passengers move through the city at a faster pace and despite other modes of transportation. The project requires the establishment of new bus lanes making it necessary to move, rebuild or extend roads, sidewalks and bicycle paths. This may also include removing trees and hedges, lighting and to a lesser extent property expropriation.

In this case, mobile laser scanning was both significantly faster and more efficient than traditional data collection, which would have required manual mapping and subjected employees to potentially dangerous traffic situations and therefore the need for closing of roads for traffic.

Moreover, the collection of data was completed in two hours as opposed to manual mapping, which could last upwards of 12 months. With mobile laser scanning, the data is collected and registered as a point cloud which is converted to CAD-drawing models. The municipality are then able to – during the planning process – extract data that was not originally intended to be used in the project, which saves re-mapping time.

Condition assessment, operations and maintenance

Mobile laser scanning is a unique technological advancement for all major structural engineering and building projects, including railway and harbor projects, particularly when it is applied to collect data as a basis for planning and design of large-scale projects. There are, however other applications of mobile laser that open up new unique opportunities for efficient data collection and development of 3D-models. These applications are relevant to both public authorities and private investors and developers.

At Mølbak Landinspektører A/S we are experiencing an increase in the use of mobile laser scanning in the building and engineering sector and in day-to-day operations and maintenance of bigger properties, where visualization of data and models are used as valuable foundations for condition assessments and operations and maintenance optimization.

Mobile mapping
Aalborg Municipality used mobile mapping in the process prior to establishing a new Rapit Bus Transit (BRT) lane last summer. (Foto: ©Mølbak A/S )
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