About Amerisurv| Contact    
Magazine | Newsletter    
Flickr Photos | Advertise    
HomeNewsNewsletterAmerisurv DirectoryJobsStoreAuthorsHistoryArchivesBlogVideosEvents
 
advertisement


Subscriptions
Sponsored By

Software Reviews
Continuing Series
     RTN
An RTN expert provides everything you need to know about network-corrected real-time GNSS observations.
Click Here to begin the series,
or view the Article PDF's Here
76-PageFlip Compilation
of the entire series
Test Yourself

Got Answers?
Test your knowledge with NCEES-level questions.
  Start HERE
Meet the Authors
Check out our fine lineup of writers. Each an expert in his or her field.
Wow Factor
Sponsored By


Product Reviews
Partner Sites

machinecontrolonline 


lbszone.com

GISuser.com

GeoJobs.biz

GeoLearn

 

Spatial Media LLC properties

Associates

ASPRS

newsnow 

Home arrow Archives   The American Surveyor     

Editorial: SPAR 2010 Print E-mail
Written by Marc Cheves, LS   
Saturday, 10 April 2010

A 324Kb PDF of this article as it appeared in the magazine—complete with images—is available by clicking HERE

Under the banner of Innovate, Connect & Learn, the seventh annual SPAR laser scanning conference was held in Houston in February. In comparison to attendance in 2009, which had decreased slightly from the previous year to 630, attendance this year roared back to nearly 800. Of these attendees, 25 percent came from outside the U.S. Conference organizer Tom Greaves kicked off the keynotes by calling attention to all the new hardware and software, and to the rising interest in both scanning for BIM and CADD/GIS integration. Greaves heralded the potential profitability, reminding the audience of the "Scan once, use many times" approach to the marketing of laser scanning services.

Very visible at the show were the six mobile scanners parked outside. Optech seems to have captured the survey-grade U.S. market so far with more than eight of its Lynx units sold. While I'm not privy to sales statistics, other manufacturers are close behind, and it will be interesting to see how the market develops.

Greaves describes mobile scanning as "disruptive technology", and gave three scenarios: 1) buy; 2) partner; and 3) hope it goes away (with the last being the riskiest). He also warned that this niche is not protected; customers (such as governments) are driving the need, and as with much of today's technology, users are now able to do things independently that previously always required a surveyor (but as you'll see below, surveyors still have a vital role). Greaves also mentioned the huge growth area in 3D navigation. Companies such as Google, Microsoft and Nokia have already paid for 2D databases: next will be 3D.

My take on mobile scanning is much the same as terrestrial scanning: without a doubt, both represent the future. After all, who wouldn't want millions of discrete xyz points as opposed to xyz points gathered one at a time? Mobile scanning will have to achieve higher accuracies for some uses, but that will come with time. The main near-term blocker will be price. But just as in the days when GPS gear was $100-150K, over time I believe we'll see more affordable pricing.

Forensics and security were also topics Greaves addressed. It is apparent that government funding for both of these areas will not be a problem. And in terms of historical preservation, the applications for scanning are wide. Greaves displayed a photo of an ancient wooden gate--a national icon--in Seoul, South Korea. The gate burned, but fortunately, it had been scanned and is being rebuilt. This is what CyArk is attempting to do: scan historical treasures all over the world so in the event something is damaged or destroyed it can be restored. Eventually, we'll have the capability of realistically "visiting" these treasures from the comfort of our computer.

Dr. Allan Carswell, the founder of Optech, gave a fascinating keynote on the history of lasers. 2010 marks the 50th anniversary of the invention of the laser, and Carswell took us from the early days of three pulses per minute to today's 200KHz scanners that are capable of 400,000 measurements per second. Interestingly, Carswell discussed how sensor synergy allows 1 + 1 to equal more than 2. That is, the output from combined sensors can be more useful than the output from either single sensor. He discussed how coherent lasers are allowing wind farm operators to "look ahead" for several kilometers to detect gusts or other threats to expensive equipment. And Carswell said that it's not just about xyz and i (intensity); he used as an example the ability to detect different materials--such as sulfur dioxide--within a smokestack plume.

For me, the most exciting part of these conferences is the peek at new technologies. Of these, 3D Flash LiDAR (also known as burst LiDAR) seems very promising. Envision a system that, instead of sending one laser pulse and getting one return for one xyz point, emits a single pulse of laser light per 3D frame of data where all the photons are registered on all the points in the focal plane nearly simultaneously. In other words, there are 16,384 pixels per laser pulse vs. one pixel for a normal scanner. Born out of military needs for "seeing" through obscuration such as underwater, and into dust, smoke, fog and rain, examples for its use include brownouts created by helicopter rotors and firefighters struggling to see through smoke. Other uses include surveillance and autonomous vehicle operation.

In a session by Dr. Roger Stettner from Advanced Scientific Concepts, Inc. (ASC), we learned that the current ASC Flash LiDAR CC Hybrid Sensor 3D chip (GaAs + CMOS) is an array of only 128x128 3D range-finding pixels--work is underway on a 256x256 and larger chips--but behind each pixel on the chip is its own microprocessor engine. (By way of comparison, a low-end 2D consumer digital camera contains a 3-megapixel CCD--2,048 x 1,536 pixels--but no 3D depth data.) What all this means is that the ASC chip is the equivalent of 16,000 early-day scanners. The unit can gather 30 pulses per second, and all pixels are registered. It's not affected by motion: we saw one example of an airplane propeller frozen in flight. One ultimate goal of ASC's research is a coffee-cup-sized 3D camera.

There was much discussion at the conference about the growing importance of geodatabases. Leading the charge on this is ESRI, and in a vendor session I learned that ArcGIS easily handles billions of points. Within six months of 9/11, New York City issued a mandate calling for Emergency Action Plans for every building more than 15 stories tall. Whereas BIM is being more widely applied in architecture and construction, this mandate resulted in the gathering of thousands of existing floor plans. In addition to creating a need for external and interior information, in particular, the fire department wanted to know the location of standpipes.

ESRI has created the Building Interior Spatial Data Model to deal with interior spaces. Not simply a 2D repository for the floor plans, BISDM is a 3D model that enables 3D analysis inside a building. Uses include such things as fire hose reach and the location of defibrillators. The former is self-explanatory, and the latter fills a requirement that this equipment be located within a certain distance from anyone in the building. Because it "knew" to not use elevators during a fire event, it was cool to see the software analyze different paths through the building stairwells to determine a shortest evacuation route. The Internet enables mobile access to the information by inspectors, fire and police. At the show Applanix announced its indoor mapping solution for gathering interior information. Combining a laser, camera and inertial guidance, the system is capable of accurately mapping an entire building in a day.

A common voice throughout all the sessions was the critical need for surveyor involvement for the control aspects. Just like machine control and the need for ensuring that the dozer is working in the right spot on the project, someone also needs to ensure that point clouds are in the right place. This is what surveyors specialize in.

I spoke with Ted Knaak, the president of Riegl, and he made the eye-opening comment, "Here we are, nearly ten years in, and some scanner operators are still struggling to make money with scanning." To address this, all the manufacturers and software developers are busy, looking for ways to improve productivity and make the business case.

We have made enormous strides in scanning. When I first interviewed Ben Kacyra back in 1999, the time to model was 40 hours in the office to one hour in the field. A few years ago, it was down to 8 to 1, and now, it's down to 2-3 to 1. Still not where it needs to be, but useful for many applications nonetheless. Speaking of modeling, a common complaint among users is that a half dozen or more software packages are necessary to get to a client deliverable. Rest assured, this is being worked on.

Surveyor friends from across the country have called to ask me if they should get into scanning. As with all technology, it's not enough for management to have "the vision"; capable people are also necessary. Success is largely dependent on two things: a motivated person inside and a motivated person outside. Nobody wants to see expensive equipment just sitting on a shelf. A team that asks, "What do we need to do to make this work?" and "What else can we do with this technology?" will have the best chance of success.

Marc Cheves is editor of the magazine.

A 324Kb PDF of this article as it appeared in the magazine—complete with images—is available by clicking HERE

 
< Prev   Next >

Marc Cheves, PS 
Editorial: A Great Year to be a Surveyor
Some magazines have what are called "theme" issues. That is, most of the content is focused on one particular subject. In my 22+ years of survey magazine publishing, my philosophy has always been to have a little bit of everything in each issue, thereby eliminating the possibility that ....
Read the Article
Jason E. Foose, PS 
Decided Guidance: Case Examinations: Halverson v. Deerwood Village
Whew! We really beat the snot out of Bryant v. Blevins and practical locations. Well this month we're back on new case that hit the Minnesota Supreme Court's docket in 1982. We've got the familiar gymnastics of jurisprudence featuring an extraordinary array of flying rope stretchers ...
Read the Article
Michel Philips 
Extreme Environment Surveying
A Franco-Chilean team of cave divers used the Nautiz X8 rugged handheld for marine cave surveying, gathering data to classify the inaccessible northern half of Madre de Dios for UNESCO World Heritage. The team of cave divers used the Nautiz X8 ....
Read the Article
Erik Dahlberg 
The Original Green Engineers
Sometimes, it's best just to leave things as you found them. That's the lesson shared by Dr. Richard Miksad and his students at the University of Virginia. As a result of studies covering nearly a decade, Miksad's teams have developed detailed ....
Read the Article
Dave Lindell, PS 
Test Yourself 49: No Dimensions
In square A-C-D-B with side S, C-E is tangent to the semicircle Q1 with diameter B-D. Q2 is the inscribed circle of A-C-E. The tangent to Q1 and Q2 meets the sides of the square at F and H and intersects C-E at t G. Q3 is the inscribed circle of C-G-H. What is the ratio of the radii of circles ....
Read the Article
Jerry Penry, PS 
Discovery on Grizzly Peak
When First Lieutenant Montgomery M. Macomb arrived in Carson City, Nevada, from Washington D.C., on July 28, 1878, his assigned survey crew from the 4th Artillery was waiting and ready for the new field season. At age 25, Macomb was the leader ....
Read the Article
Wendy Lathrop, PS, CFM 
Vantage Point: Fighting City Hall Over Land
Once upon a time (1989 to be exact) in a place not so far away from where I live, a man (Francis Galdo) bought a home across the street from a vacant parcel owned by the City of Philadelphia. That parcel, along with others, had been acquired by condemnation back in 1974 subsequent to a 1956 ....
Read the Article
Patrick C. Garner, PS 
Book Review: Boundary Retracement: Processes and Procedures
When I was in my mid-twenties and learning the honorable profession of land surveying, I was lucky to be guided by a mentor who would grab a book off his office shelf and say, "Every surveyor should have a copy of this!" The first example he waved at me was Davis, Foote and Kelly's Surveying ....
Read the Article

deliciousrssnewsletterlinkedinfacebooktwitter

Amerisurv Exclusive Online-only Article ticker
Featured Amerisurv Events
List Your Event Here
please
contact Amerisurv


Google
 
AMERISURV TOP NEWS

Trimble Intros
TSC7 Controller

GOT NEWS? Send To
press [at] amerisurv.com
Online Internet Content

Sponsor


News Feeds

 
Subscribe to Amerisurv news & updates via RSS or get our Feedburn
xml feed

Need Help? See this RSS Tutorial

Historic Maps
Careers

post a job
Reach our audience of Professional land surveyors and Geo-Technology professionals with your GeoJobs career ad. Feel free to contact us if you need additional information.

 

Social Bookmarks

Amerisurv on Facebook 

Amerisurv LinkedIn Group 

Amerisurv Flickr Photos 

Amerisurv videos on YouTube 

twitter

 




The American Surveyor © All rights reserved / Privacy Statement
Spatial Media LLC
7820B Wormans Mill Road, #236
Frederick MD 21701
301-620-0784
301-695-1538 - fax