ADVANCED 3D LASERSCANNING ANDSURVEY

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3D SURVEY FOR BUILDINGS,ROADS AND BRIDGES RAMBOLL EMPLOYS THE MOST ADVANCED 3DTECHNOLOGY FOR SURVEYS. THIS ENSURES FASTERAND BETTER COMPLETION OF PROJECTS.The use of 3D survey and laserscanning is an integrated part ofour services because it providescorrect and detailed data of highaccuracy. It is especially a very effective toolin the construction and renovationof bridges, roads and buildings asthere are significant cost savings togain with faster project executionand less errors in the constructionphase. 

Highly specialised experts

At Ramboll, 3D survey and laserscanning is carried out in closecooperation between specialisedand professional surveyors and theengineers who need data forprojects. This ensures top quality ofsurvey data and at the same timethe surveying is targeted to eachindividual project. We conduct all forms of 3D laserscanning and surveys and havegreat expertise in projects withroads, bridges, buildings andplatforms.   Our primary specialisation iscentered on surveying of projectbasis, survey and marking out,

establishment of reference nets,documentation of completed work,integration with project design,coordination of schedules, andfitting and optimisation of surveysolutions for specific tasks. 

Laser scanning and point clouds

For the execution of surveys we usea laser scanner. This advancedsurvey instrument quickly measuresthe points within a specific area orall the way around the axis of thescanner with a requested density. The density of points varies and canbe set to less than 1 milimeter.Coordinates and intensity areregistered for all points, and theresult is a point cloud that can becompared with a three-dimensionalblack/white picture. Colours can be linked to the pointcloud by recording a panoramapicture simultaneously with thelaser scanning. It can be necessaryto scan from several positions tocover a specific area. During the data processing, thepositions are tied together to onepoint cloud.

Integration

The point cloud is dimensionallystable and can be used directly forentering measures, generating newCAD models or comparing existingCAD models. The point cloud is the basis forcalculating sections, terrain models,volume and deformations. Pointclouds and CAD models can beused as basis for further planning,design or analysis. Our data processing software canexport data into all CAD and textformats. This creates greatintegration between the dataprocessing software and theprograms that are used for projectdesign. 

Advantages of 3D laser scanning

3D laser scanning provides a rangeof obvious advantages compared totraditional surveying. After the first visit to a site, the totalsurvey data is secured compared totraditional surveying where onlyselected points are measured.For this reason extra surveys inconnection with changes during aproject process can often be saved. 

The surveys have very high levels ofdetail which make them easy toread. The safety level of the surveyitself is high as the instrumentreflects directly on the surfaces. Useof reflectors and closing off roadscan be avoided. Data can be coordinated with 3Dmodels and become basis of a newdesign. The new design can also bevisualised with the existingconditions. Finally there are economicadvantages. A precise project basishelps to reduce errors and mattersof dispute in the planning anddesign phase, and the certainty of adesign that fits the actualconditions is increased significantly. 

Selected references

2012Kildeskovsrenden. Scanning of 1065meter common drain tube/pipe touse for renovation. Tuborg pump station. Scanning ofpump station to use for planning ofreconstruction. Lundbeck office in Valby. Scannin ofterrain to use for rainwater analyses.

Rain water pools. Scanning ofrainwater pools to use for volumecalculation. Styrvolt, Vejle. Scanning of the boatStyrvolt and Sønderåen in thecenter of Vejle for visualization ofthe future location of the boat. 2011Nordhavnsvej cut-and-cover tunnel.Scanning of four buildings worthyof preservation in connection withdemolition and later reconstruction. 2010GORI factory in Kolding. Scanningas part of a completereconstruction of the factory. Scansare used as basis for further projectexecution. Kristiansand. Scanning of buildingsworthy of preservation and furtherimplementation of as-builtdocumentation. University of Southern Denmark.Scanning of building as part ofmodification project. 2008Medical factory. Scanning to beused for modification project of aprocessing plant.

Ilved School. Scanning of old schoolincluding surroundings areas as partof visualisation of pollution. Ishøj Stationsvej. Scanning ofmotorway bridge as part ofmaintenance project. 2007Fuerteventura Airport. Scanning ofbaggage facility.

More information and contact

If you want to know more about ourservices and projects, pleasecontact: Lau Jensen,Director, 3D Scanning & Surveylauj@ramboll.com

HOW WE USE 3D SCANNINGILLUSTRATIONSLeft: Natural stonefacade of DanmarksNationalbank Right: Point cloud ofthe facade Front page: Pointcloud of building,Nordhavnsvej

With an advanced surveying instrument that uses highspeed laser, our surveyor is able to capture vast amountsof coordinates. The scanner "records" a 3D picture of asite, structure or construction by measuring angles anddistances to points on surfaces which are visible to thescanner. All data from the different scannings are gathered in apoint-cloud, which is basically a cluster of points in threedimensions.

These points are later processed by a software programthat produces 3D deliverables. The 3D point clouds arecompatible with all CAD programs. The data from PC andCAD models can be integrated into the same final design. The 3D and laser scanning systems are very user friendlyand easy to understand for both engineers andclients. Ramboll provides Netview solutions for onlineaccess to the data.