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Scan to BIM. Can't get levels to align flush with point cloud roof or floor.

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Anonymous
436 Aufrufe, 3 Antworten

Scan to BIM. Can't get levels to align flush with point cloud roof or floor.

What I'm working with, here, is a point cloud of a single-storey office space, as a practice for real scan-to-BIM conversions. One of the first things I want to do when tracing the basic architectural components is set the levels, and to that end I make a very thin sectional view to give a crisp outline of the exterior wall, roof and floor. 

 

The problem becomes that when I go to set my level 1 on the floor, I can set the level line very exactly on a part of the floor, but when I zoom out and go to another section of the floor, the level line could be off the floor by 20-40 mm in places. I can track along the floor and see this gradual divergence happen. It's the same kind of thing with the roof. Tracing a detail line directly along the floor in a sectional view reveals the floor is at something of an incline, being not 90 degrees from vertical, but rather 89.77. 

 

I understand that things are not always totally plumb in the real world. My question is how would you deal with this type of problem when it's encountered, where Revit tends to want things to be straight. Do you draw a straight level line and modify sub elements of the floor? Do you rotate the point cloud? Do you (or even can you) slope the level line to match the floor? 

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L.Maas
als Antwort auf: Anonymous

Will depend on the purpose of your model. Is that slope relevant to the work that needs to be done? If so you should model it.

 

Levels are always horzontal and can not be rotated. Rotating the point cloud probably would result in slated walls.

So if important I would create the floor and create a slope in the floor element

Louis

EESignature

Please mention Revit version, especially when uploading Revit files.

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Anonymous
als Antwort auf: L.Maas

Well, in the bit of instruction I've had regarding scan to BIM, I've had one guy tell me that you should consider accuracy vs. intent in discrepancies, so if the floor of my office space point cloud is 89.77 degrees from vertical, I should think that the intent was straight horizontal. Although another guy said that you can modify sub-elements of the floor to exactly match the outline of the point cloud. That latter solution sounds fine as far as the floor itself goes, but still leaves a problem that, if the point cloud floor dips below the level line, this can leave my floor plan view for that level not looking right. 

 

The usual intent of BIMs that I would do would be for architects to look at for the purposes of alterations to the building. 

 

 

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barthbradley
als Antwort auf: Anonymous

Buildings do settle over time.  The Millennium Tower, a 58-story luxury condo skyscraper in San Francisco, has been sinking and tilting at a rate of 2 inches per year since it’s opening in 2009.  

 

Just saying...

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