Mobile Mapping

Among the First

Scan Survey is one of the first companies in the world to both own and operate the mobile mapping system Leica Pegasus:Backpack. The system is a sensor platform used to collect and georeference laser data and images. In principle the Leica Pegasus:Backpack works as a traditional mobile mapping system, (similarly to vehicle scanning), where the sensor platform dynamically collects data (while moving) and positions with the use of GNSS (GPS and GLONASS), IMU (inertial navigation) and SLAM (Simultaneous Localization and Mapping). This allows the system to be used in areas without GNSS coverage, such as dense forests and indoor situations, while still receiving georeferenced data with documented accuracy. The system can also utilize traditional benchmarks for georeferencing.

The Leica Pegasus:Backpack has several obvious advantages. The system is mobile; the complete system weighs a mere total of 13 kg. This makes it easy to move through terrain, in addition to being quick and cost effective to mobilize over larger areas. The system is extremely well suited for mapping, documentation, and registration for railways, walls, constructions, and BIM-projects.

The result of these scans are georeferenced, colored point clouds which are processed and quality checked prior to the data being used to generate a 3D-model. In addition, images are taken with the integrated system cameras which themselves are calibrated with the laser scanners. Both images and point clouds are thus synchronized, and can be utilized together in advanced GIS-tools.

Scan Survey AS offers a wide spectrum of mapping, measuring, GIS, and 360-street views from our mobile mapping equipment. Our range of equipment includes both the backpack and a unit normally mounted on a vehicle, though the unit can easily be mounted on a boat, subway, ATV, transport bike, etc. Data collection can be mobilized in a short amount of time, it’s efficient in the field, and the need for prior notice and traffic safety measures are minimal.

Typical projects include tunnels, construction sites, city streets, railways, highways, buildings, and parks. Delivery methods includes point clouds, detailed measurements, terrain models, 360-images, thermographics, GIS-databases, and NVDB. All the aforementioned products can be delivered from a point data collection. Our clients include designing consultants, construction clients, municipalities, contractors, architects, and landscape architects.

Terrain Models and Detailed Measurements

Scan Survey AS has extensive experience producing manageable TIN-models from sources such as mobile mapping, terrestrial scanning, airborne scanning, RPAS (drone), as well as traditional field surveying. All these various data sources can be sewed together into a single model.

From point clouds and 360-images we’re able to digitize all objects of interest within the project area. This includes both details on a surface or façade and points with metadata, which are then transferred to a GIS-database or NVDB.

Tunnel Measuring

Mobile mapping is an efficient method for the laser scanning of tunnels; both large tunnels in which we can utilize our vehicle, and smaller tunnels whereupon the backpack can be utilized. Mobile mapping gives excellent coverage of all objects, an even point density over the entire tunnel profile, and has thousands of points per square meter to ensure that even the smallest object is appropriately measured.

360-images

360-degree image bubbles, like those found in Google’s Street View, deliver an intuitive view in one’s browser where installation of a 3rd party program proves entirely unnecessary.

Data deliveries include point clouds, tunnel profiles, TIN-models, detailed measurements, and 360-degree image bubbles. Utilizing thermography, we’re able to detect tunnel leakages and the overheating of electrical components.

360-degree images can be taken in environments where on would suspect subpar image quality, like dark tunnels.

Overheating in Electrical Components

Overheating in, for example, distribution cabinets or other electrical components, and leakage in tunnels can be detected by means of thermography.

A warm electrical cabinet in a tunnel lights up on thermal cameras

A warm electrical cabinet in a tunnel lights up on thermal cameras

Moist areas in a tunnel stand out as blue in the image

GIS-Database and NVDB

Detailed measurements and 360-degree images could form the basis of a GIS-database or NVDB. One example of a detailed measurement could be a lamp post. Metadata, like diameter, height, slope, and material, could be attached to the lamp post. A direct link from the database object to a connecting image can also be added.

Analysis of Asphalt Quality

An analysis of asphalt can be performed in order to ascertain asphalt quality. This data can be used in a GIS tool along with other data to analyze how best to go about maintenance.
Longitudinal irregularity (IRI), cross-sectionality (tracking depth), where cracks in the asphalt cover appear, and orthophotos of lanes are among the parameters that can be analyzed.

Management, Operation and Maintenance of Roads

Asphalt analysis, GIS databases, and 360-images are methods to document road condition at a specific moment in time. A new data set and calculations at a later point in time can reveal changes.

Examples include asphalt wear and where the wear is worst, if cracks in the tarmac appear in an area, or if there has been construction activity in an area.

Periodic Project Documentation

Periodic documentation and measurement during the construction process are performed in an efficient fashion. Mobile data collection minimizes interruptions in system operation, and accurate data is available within a short time period.

Equipment

Scan Survey AS is the first company to have both mobile mapping equipment such as a backpack, and a platform for use on various types of vehicles. Both instruments are from the same manufacturer, giving us an advantage in the course of production.

The Leica Pegasus:Backpack is quickly donned, and we’re able to easily maneuver in areas in which vehicles are unable to reach or enter. Within parks or along tramways and railways we’ve utilized the backpack unit to great effect.

The vehicle-based platform, Leica Pegasus:Two, is most often utilized on a road vehicle, but can easily be moved to a boat, ATV, streetcar, transport bike, etc. With this instrument we’re able to collect data over vast stretches of area in a short time, as well as measuring in areas with dense traffic.

Our array of equipment covers unique requirements, and the units complement each other nicely. With the use of mobile mapping, time spent in the field is greatly reduced, thus reducing the time in which normal traffic or building access would be interrupted. Occupational safety is also an important aspect, as the operator doesn’t need to remain amidst traffic.

What We Deliver

Scan Survey AS has extensive experience delivering products to project consultants, construction clients in the public sector, contractors, architects, landscape architects, etc. We deliver data ready for import in all file formats, whether the tool is NovaPoint, Revit, ReCap, Gemini, Focus or other GIS- and BIM-tools. Typical file formats include IFC, DWG, LandXML, SOSI, TIT/NYL, LAS and LAZ. Contact Bård Hauan Andersen if you have questions about our Mobile Mapping services!