Our client had a job to design and build a replacement top loading gantry, which was to feed oil into a road tanker, they tried going in and surveying the area, but it was very congested and found they were constantly missing dimensions.
ALS went in with a 3D laser scanner, we took 14 scans within the area, which the client specified; we used 12 reference spheres to help triangulate ourselves around the road loading gantry and was able to produce a point cloud file accurate to +/-2mm. With this file we used specialist point recognition software to accurately model out the pipework within the area, including any pipework fittings, pipe supports and major equipment.
The client required the steelwork to be modelled out also, so using the same software we was able to match patterns of point cloud data against a UK steel catalogue and again accurately model out anything from I-Beams to Angle Iron.
The client later came back and requested the hand rails for the local steel work walk ways, this took ALS only a couple of hours, we already had all the survey data to be able to model this out.