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The field scanning process: How to get the best results

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Once your laser scan has been ordered, there are some things you can do to prepare for our crews.

First, prior to the scan, have someone (preferably a knowledgeable project manager) onsite to communicate with the scan team when they arrive.

Make sure your plant managers know crews are coming. If there is a local safety course that needs to completed or specific plant instructions, let them know upfront. Also let crews know if there is special gear they may need like moon suits, hairnets, safety glasses or ear protection.

The project walk-through is a very valuable process because this is where we determine the location of the scanner setups.

Let crews know what is most important and what is less important. If a major conduit with fiber optics, a power transmission conduit, or particular piece of machinery is important to your project, for example, it is important to let the scanning crew know.

Also make sure the scanning crew has a contact that they can call if they have questions or need clarification mid-scan.

Crews will place targets around the scan area to tie all of the scans together and will remove them upon completion of the site visit. Once they understand the limits and the prime areas of interest, the scanning process will begin.

Though it is great to watch them work, these teams are professional and the less direction they have, the better the results! A typical job can take two days to several weeks. Each night, scanned data for the day will be checked to make sure there are no gaps or geometric issues with the data.

For black and white scan data, the process is simply this: scan, move to a new location, scan, move to a new location, etc. For color data, a set of photographs is added to the process: scan, remove the scanner, add a camera, take seven photographs (six at 60-degrees horizontally, one straight up), move the scanner, take photos at the new location, replace the camera with the scanner, scan, and repeat this sequence throughout the site.

This allows our crews to produce high-quality TrueView files. When they get into a rhythm, the above sequence maximizes efficiency up to 100%.

Post Processing

When the scan data comes back into the office, data is exported from the crew’s field laptop to the desktop. On large jobs, this will take several hours.

Next, if there are color photos, the color photo data is downloaded and registered to the point cloud. This process can take 5-10 minutes per set up. Around 100 set-ups can take 15 hours of technician time. (If there is only black & white data, we skip this step.)

Once the photo data is added to the raw data, the target information is then added to the data set. The data is then run through the final registration process. This program compares the data set to all the other common data sets and produces the final registered point cloud.

The point cloud is then tested visually and geometrically to make sure there are no errors. This is done by cutting it like a wedding cake to see that all of the horizontal surfaces line up and also looking at elevation views and pipe runs to make sure that these are consistent throughout the cloud.

After these are tested, the final registered point cloud is ready to be used. Files are then loaded on to a hard drive and shipped to you, the customer!

Now that you have the point cloud data, what do you do with it?

Registered point cloud data can be exported into AutoCAD, MicroStation, Bentley, Revit, Autodesk Recap and many other computer programs. Designers can then take this data and design and model it in a 3D environment.

A TrueView map of the site showing 3D spherical data in black & white or color can be created. You can measure between points in the point cloud with this free program.

Warning: We always recommend that for precise measurements, you use the point cloud information and not TrueView. The angle of the view can affect the measured distance in TrueView. At a minimum, check the measurement from several different views.

Computer models can also be built in Revit, AutoCAD or MicroStation and delivered to the client. These models can be imported into the point cloud and then “clashed” to see if the new model interferes with the existing point cloud.

Want to learn more? Contact us today to learn if a laser scan is right for your next project.

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Tate Jones has over 40 years of experience in land and aerial surveying and was one of the country’s earliest adopters of 3D laser scanning technology. A nationally recognized expert in the field of 3D data capture, he has worked with hundreds of clients in the engineering, architectural and construction industries. Contact him at tjones@lasurveying.com or visit www.landairsurveying.com.

 

Autodesk University 2012: watching an industry grow up!

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Attending and exhibiting at shows like Hexagon, Spar, and Autodesk University is always fascinating because you get to interact with clients all over the country and see what’s new in the industry.

This was our first time exhibiting at Autodesk University, but having been to three conferences in Las Vegas in one year, I was quite familiar with the surroundings. At this year’s show – which was attended by over 8,000 people from 102 countries – what I saw was an industry that has grown up and is beginning to make a real impact on design and construction.

I remember in 1986 when a new drafting program named AutoCad came out and everybody was debating if it would become the standard…it did. And it brought with it – along with the digital age and computers – the plotters and all that went with the introduction of this new paradigm.

Most of us waited to see how it would be received in the industry, but then – as now – it proved to be a very valuable tool.

And just a few years ago, we were all still discussing the advances in AutoCAD and Civil 3D.  Though we knew these programs would remain relevant, it was evident from all of the different software that interacted inside of Revit and enhanced the user experience that the world of 3D design was here to stay. (As a friend of mine said not long ago, “If you are not designing and interacting in 3D and models, you are quickly going to be obsolete.”)

Autodesk University 2012 showed us how design is being done today and where it is going in the future. One of the more interesting observations was that besides the architects, engineers and designers, there were contracting companies, retail companies and owners all talking about the new Autodesk programs that were being used in the workplace.

There was lots of talk in these groups about building “Revit families” specific to their business types, as well as discussions around how to mix the contractors (who have the knowledge about how a building is built in the actual world) with the BIM modelers so that the models are also constructible.

This will be a big challenge. Contractors and superintendents who know how to pour a slab and build 20-story buildings have knowledge and insight that is absolutely critical to building a proper BIM model.

As any techno geek, I am always very interested in the new products on the exhibition floor and the showcase included hundreds of third-party vendors developing exciting products that work alongside Autodesk.

There were lots of new software and hardware lines in the 3D laser scanning industry, as well as new software offerings for BIM models, Revit technologies and GIS products. But for me, the most intriguing products were related to 3D printing applications.

These fabrication and modeling solutions enable products to be created directly from their computer models.

Almost anything you could imagine – from cars to motors to guitars – was printed and on display. Though 3D printing has been a popular topic in recent years, it was there, it was real, and it will definitely change how items are built in America and around the world.

At the conference in Vegas, there were actual printers producing objects out of wood, metal and polymers. The only difference was whether the printer was loaded with plywood or metal.

BIM is an acronym for Build Information Models, meaning to build computer models that have built-in intelligence. What I observed was BIM in the context above – building models and objects with just the information in a computer.

My, how we have grown.

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Tate Jones has over 40 years of experience in land and aerial surveying and was one of the country’s earliest adopters of 3D laser scanning technology. A nationally recognized expert in the field of 3D data capture, he has worked with hundreds of clients in the engineering, architectural and construction industries. Contact him at tjones@lasurveying.com or visit www.landairsurveying.com.

Where we are now…and where we’re going.

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As 2012 winds down and we get ready to head to Las Vegas for the Autodesk University conference, I look back at the strides that have been made in the 3D world and all of the associated hardware and software in our industry.

Not only is there new technology being used and accepted, but the demand for more BIM products, users, and technologists has grown faster than ever. I have also watched with great interest the wave of corporate acceptance that was not there even three years ago.

There is still much ground to be broken, but wow – what a year!

New Software

Take software, for example. As I travel around America and talk to user groups and clients, the one thing I am always asked is when will it be easier to model point clouds into usable entities?

There is much research going on to solve this challenge. Though I have no commercial interest in this firm, I believe one of the ones to watch in this space is ClearEdge 3D. Their EdgeWise Plant software is pushing the barriers away for modeling point clouds.

Personally, I believe that within the next three years, this major barrier we face now will be a minor issue and point cloud use will continue to grow and expand.

The other great leap in technology is that most of the major software packages have updated their products to accept point clouds as a layer. This means that most of our clients in the architectural and MEP worlds can now import our point clouds into their design software and greatly enhance their designs.

Just three or four years ago, using point cloud data required modeling and this limited the market to mechanical and structural engineers and various contractors with specialty software.

Today, because all Revit users can import point cloud data, the need to model everything in a scan project has been greatly decreased. This is a big deal! Now, instead of having to pay for an expensive model, end users get all of the benefits of point cloud precision without the associated costs of modeling.

Not to be overlooked, there are still issues that will need to be ironed out in inserting point clouds into design software, but they will be overcome with time.

For example, if you are working in Inventor to model plant process data, it is best if the project is modeled from start to finish in Inventor. Similarly, if it is to be modeled in Revit, it is best that it be modeled from start to finish in Revit. There are no readily available universal translators to move from a model that was created in Cyclone to a model in Revit while keeping the full integrity of the original model.

Though the data itself is globally transferrable, the structure of the models, entities, families and libraries requires more work to be done in this area.

New Hardware

Last year, I predicted that the hardware in our industry was set and that most of the changes would come in the form of software. On this point, I was wrong.

Several changes have occurred that continue to advance the hardware. For example, The Faro Focus 3D has broken the price barrier. Prior to its release, most scanners started around $80,000 and went up to $200,000. The Focus was released at about $50,000 and has caused price adjustments throughout the industry.

I believe this trend will continue and prices will continue to go down. This is both a good and bad thing for the industry. As prices go down, more people with marginal training and experience will begin to use scanners and bad point clouds will become more of a problem.

There is a saying in our industry that “one bad point cloud kills a lot of clients.” Indeed, this is true. I have talked to clients who tried laser scanning nine years ago, had a bad experience, and will not use it again to this day. The problem is not that scanners are getting more affordable, but that there are still no national standards in the industry.

The upside is that with a lower cost competitor, vendors must consider what value their laser scanners bring that others do not.

Cool New Technology

Two things I am really interested in and know will change the playing field moving forward are   aerial drones and augmented reality.

These two technologies are growing fast and have many great uses. A traditional helicopter used to map utilities and large areas generally costs about $25,000 per day. A one-meter drone quadripod, on the other hand, costs about $2,000 per day.

Though there are unique tasks that the smaller one-meter drones can do that the helicopter is currently doing, there are other tasks that the smaller drones can perform that traditional helicopters cannot do. For example, smaller drones can more effectively and safely map underground pipes, mines and tunnels.

Currently, to send two scanner technicians into a tunnel requires about six surface and sub-surface support staff. An unmanned drone with avoidance technology would be a great solution.

Augmented reality and the ability to project 3D images easily and to large groups is available and is changing the whole world of education. A small but growing company, ViziTech USA, is doing very creative and trendsetting work in this area.

This is where the science of 3D technology is repackaged so that the average person can use and understand it. This is a powerful tool and will lead to great changes in many industries and educational processes. For more on augmented reality, read our recent blog post here.

The design and construction of future projects will still require the same basic processes that are required today. But the use of precision data before, during and after construction – and the visual way the data can be viewed – will greatly reduce errors and downtime events.

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Tate Jones has over 40 years of experience in land and aerial surveying and was one of the country’s earliest adopters of 3D laser scanning technology. A nationally recognized expert in the field of 3D data capture, he has worked with hundreds of clients in the engineering, architectural and construction industries. Contact him at tjones@lasurveying.com or visit www.landairsurveying.com.

Young innovators push 3D design and high speed data capture to new heights

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When we were asked to bring our booth and support the 2nd Annual Revit Technology Conference in Stone Mountain, Georgia, last week, I didn’t know what to expect. But I’m glad we went because we saw the future – and it’s very, very bright.

For BIM managers and designers, this conference was a look through the hourglass of the future at the world of design and one thing is for certain: gone are the days when firms could avoid BIM, 3D Cad modeling and laser scanning and still hope to be competitive.

What I saw were bright young innovators already pushing the technology of 3D design and high speed data capture to the limits.

It was very refreshing to attend a conference where presenters and attendees agreed that 3D laser scanning was the best tool to use in many design situations and were openly discussing how they currently used the technology in innovative ways.

The largest 3D scanning show I attend every year is SPAR. I had the same feeling at the Revit Technology Conference last week that I had at the third SPAR show back in 2005 when laser scanning was still a new and relatively untested technology.

The quality of what was being presented at the Revit conference – and how and who was presenting – was way up on the charts.

Around the showroom floor, there were the larger suppliers of the Revit technology, who were very knowledgeable about new improvements to the products, alongside many boutique firms that were selling all types of software to make the design process in Revit easier and more organized.

There were also other groups selling “cloud” technology that provided a new, more efficient vision of the cloud. While most of us already have data on our iPhones, it will be a short time before we will all have our data in the cloud and projects will be able to be worked on by anyone, anywhere with just a password and a computer.

On large mega-projects like new airports and major industrial facilities, multiple design teams in multiple cities will be able to work on the same cloud-based data at the same time. It will change the way we do things forever. Yes, there will still be security issues and priority issues, but ultimately that’s where we are headed.

Why have one computer process for one million seconds to solve a data set if you can have a million computers process for one second? It’s not quite that simple, but that’s the goal.

The speakers were great, too.

My favorite was Dick Morley. His opening presentation was in the form of a fireside chat with Brad Holtz serving as the interpreter. (I say interpreter because when the audience looked confused and a topic seemed to go over our heads, Brad would bring Dick back down to earth.)

Dick Morley invented the programmable logic controller, which pretty much controls all the electronic machinery in the world. To put it in prospective, that one device produces more revenue than all of Hollywood’s productions combined.

He also invented antilock braking technology, which revolutionized cars and greatly reduced accidents on the highway. (As a side note, he said that while the number of accidents decreased for many years, they slowly started going back up as drivers in America learned to drive closer using the antilock brakes. As the margin of error decreased, accidents increased.)

Dick also invented the cash register overlay that has pictures of food on it rather than numbers. This greatly reduced errors and increased production in the fast food industry.

Dick, who was trained in physics at MIT, had a clear message: “Look at where things are going and what needs to be solved and find the technology to solve it. Holding on to the way it has always been is just a reason to justify where you are – not a plan to move forward.”

I think this is true across the industry. The true leaders and innovators are not the ones who are really good at getting a piece of paper from the left side of their desks to the right, he said. The innovators ask, why paper?

Other interesting speakers shared new and innovative ways the power of 3D is being used across the spectrum. Kelly Cone with the Beck Group gave a very thorough presentation of using modeling in a major construction project and how the model was embraced and used by many of the subcontractors on the project.

They even built a “construction” roll-able computer workstation so the subs could walk over in real time, look at their section of the project in 3D, and understand the intent of the designer.

He also talked about how having access to quick laser scanning information helps designers and contractors come up with workarounds in tight spots.

The conference had attendees from most of the continents in the world and it was evident that critical mass has been reached and that the tipping point into 3D design technology is complete.

The transition away from 2D drawings and flat surveys is history and 3D models and clash detection and design testing prior to construction is now the new standard.

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Tate Jones has over 40 years of experience in land and aerial surveying and was one of the country’s earliest adopters of 3D laser scanning technology. A nationally recognized expert in the field of 3D data capture, he has worked with hundreds of clients in the engineering, architectural and construction industries. Contact him at tjones@lasurveying.com,  tjones@3DLaserSurveys.com or visit www.3DLaserSurveys.com.

3D Laser Scanning: The New Industry Standard

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When we first started laser scanning back in 2005, we replaced some of our total station surveying equipment with scanning technology. As much as anything, this was a great way for us to learn how to use the technology and understand its capabilities and limitations.

Early on, much of the work we did involved transportation projects and large complicated intersection surveys. There were many immediate benefits. For one, our surveyors were no longer put out into traffic and in harm’s way.

Another benefit was that we didn’t have to drive across town or across the state just to check on a few ambiguous points in a survey. Instead, we could just go back and look at the point cloud.

Today, in 2012, the entire world of architectural and engineering design and construction has changed. While before we had to convince clients of the benefits of using laser surveys, we now have a growing client base that simply will not consider starting a project without one.

In addition to providing accurate spatial information to civil engineers, plant designers, architects, contractors – and even insurance companies and crime scene investigators – laser scanning saves both time and money.

The truth is that in very complicated environments – like a mechanical heating and air conditioning plant room or a baggage room in an airport – the cost of scanning is nominal when compared to the total cost of the project.

Here are four primary reasons 3D laser surveys, or high-definition scanning, is quickly becoming the new industry standard when it comes to making precise measurements in complicated environments:

Reason #1: Scanner Speed

The speed of scanning has changed dramatically compared to what it was just seven years ago.

The first scanner we purchased (and still use today) took one hour for a 360-degree spherical orbit. Today, with our current scanners, it takes just six minutes.  This speed enables us to take many more scan set-ups than we used to take.

With our phase-based high speed scanner, we can now get 40 to 60 scans per day, which is very adequate to cover a large two-story mechanical room. To get the same amount of scans seven years ago would have taken a week.

In areas like these, it is the detail we look for, not the range. In extremely complicated areas, we make a set of scans on all sides. This data is invaluable to designers because it allows them to avoid interferences that often occur in these types of areas.

Reason #2: Software Improvements

Improved software programming has also contributed to the widespread acceptance of scanning technology.

I remember talking to clients back in 2005 and our message was something like this, “We will scan for you, then give you a 2D deliverable set of drawings that you can use to design your project.” When they would ask if they could use the point cloud in their design, our answer was always the same: “Yes, but you will have to buy $10,000 worth of software.”

As you can probably imagine, this was not an easy sell.

Fortunately, today Bentley, AutoCAD and Revit all have point cloud engines in them. The difference between an engine and a viewer is that we can now load a point cloud into an “engine” for a client and they can use the data in the design without having to purchase expensive “point cloud” software.

In fact, one of the takeaways from a scanning conference I recently attended was that all of the major software providers are moving to full 3D software design systems. They finally understand what we have known for years. Why would you survey in 3D, flatten the data to 2D, design in 2D then build in 3D? It just doesn’t make sense.

Reason #3: Clash Detection

This alone is worth the cost of a 3D laser survey.

Consider that if a project is modeled in the design phase, the completed final design – including the MEP systems, air handling systems, structural system and all of the architectural design – can be placed within the point cloud and clash detected. Anything that interferes with another system can be seen immediately and corrected before construction.

This is huge! What prudent engineer, designer or contractor would not want this advantage?  How important would this be to an owner?

Reason #4: TrueView or 360-Degree Spherical Photography

This technology has also improved quite a bit in the last seven years. When we first started scanning, we were fascinated with the fact that scanners could take photographs of the surrounding area, and then take that photographic data and overlay it with the scan data to make general measurements to the environment.

Unfortunately, back then the on-board camera was not as good as we had hoped and sometimes the pictures would come out octagonal and disjointed. As the process became more refined, we were able to mount a high resolution camera on the scanner and produce a crystal clear, color spherical photograph of the site.

This is a big step because it allows you to view a site from any scan set up. You can add text and information to the photographs and then e-mail a specific view to a client across the country or across the world. (In this case, some of our clients pay for our scanning fees with their savings in plane tickets!) This tool also enables clients to look out from the center of every scan and saves lots of time and discussion as to what is or is not located in the area of interest.

High definition scanning has quickly evolved from an emerging technology to an industry best practice when it comes to complicated projects. The construction process always includes many unknowns and the chance of design and construction errors is always high.

Why put yourself in the position of having to explain how a construction project was slowed down or over-budget because a laser scan was not the foundation of the project?

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Tate Jones has over 40 years of experience in land and aerial surveying and was one of the country’s earliest adopters of 3D laser scanning technology. A nationally recognized expert in the field of 3D data capture, he has worked with hundreds of clients in the engineering, architectural and construction industries. Contact him at tjones@lasurveying.com,  tjones@3DLaserSurveys.com or visit www.3DLaserSurveys.com.