@ Tim
..I find it a p.i.t.a. to be honest see below which is pipes inside a refinery pipe-bridge.
N19-R101-BRUG2-SW68 SIZED.jpg
Saying that, after many thousands of scans I've learn the following..
1- Use a good scanmonkey. One that not only recognises the MEWP is moving but cares enough to repeat the scan, even on a Friday afternoon.
2- Minimize any movement - turn off the diesel and wait for vibrations to settle, get the operator something to sit on and if safe then rest the "basket" against a structure. We've also fabricated a simple mount that fits the scanner to the side of the basket, its more stable and has a better view of the structure than putting up a tripod.
3- Process with care. Here we're pipe modelling so a "wobble" is not a problem as we can model though it but it is important to check the overlap at the start/stop of the scan to see that it actually does stop where it started. I'm also employing a 20m range filter upon completing the registration as I dont want the client questioning the accuracy of points faaar from the scanner.
Basically its a necessary evil that can be done with care but should be avoided if possible. Like eating celery..
Richard.
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