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Accuracy of Matterport Scan for Construction1524

WGAN Forum
DanSmigrod private msg quote post Address this user
A reader of the We Get Around Matterport blogs writes ...


Question on accuracy. Matterport says it's accurate to 1-2% in residential applications. That would, for instance, be up to 1 foot off per every 50 feet of dimension, which would certainly not work for as-built purposes. Can you clarify on this?


Architect Presentation to Client

My wife and I are in the midst of a house remolding project. Our architect is using the SketchUp file (.skp) that we created from the Matterport Object file (.obj) to create a 3D model for us to 'walk through' to help us visualize the remodeling (including 'seeing' sight lines and heights. The data captured by the Matterport Camera is good enough for this phase of the project.

General Contractor Estimating Cost

Once we approve the remolding design, the architect will use the model within Autodesk Revit to output construction plans for our General Contractor. These measurements will be good enough for the general contractor to prepare an estimate for us.

Measure Twice; Cut Once

Once we approved the project, all trades will do their own on-site measuring (regardless of the architect's construction plans. So, it doesn't matter if we began with precise laser scanning or Matterport infrared scanning. Industry custom is to measure yourself before cutting.

The Accuracy of Matterport scanning is good enough for:

1. Architect Presentation to Client
2. General Contractor Estimating Cost

It is not good enough when trades people are ready to cut and install. And, that's true for Matterport scans, laser scans or Building Information Management (BIM) renderings.

Anyone else using the data captured by the Matterport Camera for renovations/construction?
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wfantini private msg quote post Address this user
Great tips. Thank you.
Post 2 IP   flag post
smcclell private msg quote post Address this user
OOoo nice post! Missed this one.

I was struggling on knowing what the obj. could help out with on an accuracy level.
Post 3 IP   flag post
mori private msg quote post Address this user
Hi Dan,
we are currently testing various solutions and worksflows. Please be patient for a more detailed feedback within the next 2-3 weeks.

Also check out the offer from veriscian:

A cool measuring app, untested, I have found on my research:
Post 4 IP   flag post
WGAN Forum
DanSmigrod private msg quote post Address this user

Veriscian recently joined the We Get Around Referral Network. Look for our Matterport Spaces examples coming soon to the (Beta) VirtualSite for Matterport Users by Veriscian.

Perhaps @JoshReadhead with Veriscian will share more details here (soon) ...

Yes. Veriscian makes it super-easy to calculate area and to measure distances (presently in metic and, hopefully soon, in feet and inches.)

And, thanks for the post about Sensopia. You'll find their MagicPlan app listed among two dozen Floor Plan Creation Services listed in the Matterport 3rd Party Solutions Directory curated by We Get Around.



P.S. If you use MagicPlan or MagicMeasure, please start a new MUG Forum thread about how these apps can be helpful to Matterport Pros ...

Magic Measure Official Video

MagicMeasure Official Video
Post 5 IP   flag post
mori private msg quote post Address this user
@DanSmigrod: you donĀ“t have europe/germany on your schedule or do you? It would be great to met you in person.
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WGAN Forum
DanSmigrod private msg quote post Address this user
@mori Please a first-class airline ticket and a Starbucks gift card

Post 7 IP   flag post
JoshReadhead private msg quote post Address this user
They are all great comments, Dan.

I would add to your list that Matterport can be a great tool for as-built documentation of building services, particularly for commercial projects.

There many parts of a build that DO need incredibly fine accuracy (e.g. verifying slab/column thickness, sizing for any offsite fabrication), however much of the services DON'T require such accuracy. Services such as ductwork, heating/cooling, water/drainage, fire services, cable trays and just about anything else you can stuff into wall/ceilings/ducts. For a project such as a hospital, these services make up a significant proportion of the build.

For a general contractor, the blanket line will tend to be that Matterport isn't accurate enough for as-builts (and it probably isn't when it comes to documenting the structural aspects of the build that they typically concern themselves with) - but it can offer real value for the as-builts of building services.
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JoshReadhead private msg quote post Address this user
One other comment regarding the 1-2% accuracy, this cumulative error can build up over large scans. One way to minimize this error over larger sites is to use survey points that you either record yourself or source from construction drawings. These can be used to realign your scans to the local area you are working on in CAD. Of course this can become a bit tedious.

Going a step further - one solution which we helped to implement for a client was to convert the Matterport scan to point cloud and "fitting" it to some columns that had been accurately surveyed. These columns were about 10m (~33ft apart) which meant even over a large site, the scan was in the order of +-100mm (+-4inches). This was sufficiently accurate for their purposes (which was as-builts for building services).
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mori private msg quote post Address this user
Just to let you know. We found a freelancer ( who will test this with us in the upcoming weeks on a project.
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WGAN Forum
DanSmigrod private msg quote post Address this user
Please see related MUG Forum thread about the Object File (.obj) captured by the Matterport Camera.

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