Tag: surveyor

Surveyors, not the tools, define the profession

Many have debated how the surveying profession has morphed into something less than what our predecessors would have called surveying.

In earlier times, the surveyor was an honored figure in the community and held in high regard, like the local doctor and clergy. Surveyors had the final word on boundaries and the limits of a family’s land holdings, so they were treated like royalty.

Measuring devices were simple yet complicated enough for only the trained person to understand how boundary lines were determined. Surveyors during those times depended much on natural monumentation and terrestrial features; these items made for solid and definable boundaries. Measurements along these features were to be completed only by surveyors and their means of determining distances.

Much has changed since those centuries past, including the reputation of the surveying profession. No longer are we mentioned in the same breath as doctors, clergy and lawyers. Even engineers are seen as “more professional” than surveyors. Many have debated how the surveying profession has been degraded from the noble status it once enjoyed and morphed into something less than what our predecessors would call surveying.

There are many layers to each of the previously described professions, but they all have several things in common: each one relies on data collection, analysis, and professional opinion. Each of these steps requires a specific skill set that includes education and experience. Nowhere in this process does it allow for advancing technology to completely replace any of these steps.

The evolution of technology and associated tools may help improve the profession, but it will not replace the knowledge necessary to be considered a true professional. Data collection within most professions is the biggest beneficiary of technology; surveying is a testament to these advancements. The breakdown, however, is the availability of the technology to the public and turning non-practitioners into low budget pseudo-surveyors.

Photo: lukaszfus/iStock/Getty Images Plus/Getty Images

What makes us professionals

Here is the abridged version of the definition of “professional” according to the Merriam-Webster Dictionary Online:

professional (adjective)
: of, relating to, or characteristic of a profession
: engaged in one of the learned professions
: characterized by or conforming to the technical or ethical standards of a profession
professional (noun)
: one who is professional
: one who engages in a pursuit or activity professionally

Similar professions have several examples of how the collection of data is a separate process and experience level from its analysis. Consider the following:

MRI technicians train for their jobs through education, interning and experience. They know how to place patients within the equipment, shield them, apply the rays, and produce the scans as required by their job description. In simple terms, they are data collectors of patients’ medical conditions. Technicians do not analyze the scans nor offer any opinion on the prognoses of the patients. They are, however, relied upon to obtain the proper scans correctly and efficiently for review by doctors.

Staff accountants or clerks are typically charged with data entry, maintaining ledgers and journals, and verifying data/entry accuracies. Often, clerks organize invoices, statements, and other receivables for input into clients’ accounts. Much of the work for this position is electronic and relies on the employees to be savvy with spreadsheets and able to import various data formats and spot suspect data. Once this work is completed, it become the responsibility of certified public accountants (CPAs) to review and certify the information. The key role here, however, is the accurate compilation of the accounting data.

Paralegals play a key role in doing the heavy lifting of data collection for lawyers. Paralegals perform client and case research, interview witnesses, handle discovery of case information, and draft many of the documents needed by lawyers. They are tasked with assembling exhibits, delivering and filing necessary court documents, and helping with trial preparation. While they cannot express legal opinions on any case matter, it is the paralegals’ work that lawyers use to develop case strategies. Once again, the data collection is the key to the success of the lawyers’ work.

Professional surveyors are no different from doctors, accountants, and lawyers in these examples. They rely on data collection obtained by experienced staff trained to operate sophisticated instruments and data collectors.

Field technicians often serve as surveyors’ eyes, so specific training is necessary to ensure that they can accurately locate the required information. Technicians, however, cannot offer legal opinions on the location of land and parcel boundaries.

This function is solely on the shoulders of land surveyors, who are licensed specifically in that jurisdiction to apply legal principles and case law to boundary issues.

Photo: aerogondo/iStock/Getty Images Plus.Getty Images

There is one in every crowd — the North Carolina lawsuit

For those who are not paying attention, we are solidly in the 21st century and fully engulfed in the proliferation of geospatial data. Surveyors remain at the forefront of these technological advances with a plethora of tools and techniques being introduced on a regular basis.

These tools and associated software are much advanced compared to their earlier surveying instrument counterparts, but through extensive programming and easy-to-use interfaces, this equipment may seem simple to use to the layperson. The elder surveying generation likes to refer to newer technicians as button pushers, because the users perform no true calculations.

Yes, there are necessary checks and balances even with the new equipment, but the knowledge to operate these instruments is user-friendly and intuitive. So what happens when the technology is used by someone who is not a surveyor?

Among the hazards of making these newer tools and software widely available is how they are used by the non-professional public. As many surveyors have already read about in the news and social media, a UAV operator in North Carolina has filed suit against the NC Board of Examiners for Engineers and Surveyors.

The board previously ordered the operator to discontinue his UAV flights that engaged in mapping, surveying and photogrammetry services. The operator had been providing images to realtors and homeowners that depicted graphical lines representing property lines, but also included a disclaimer that the product was not intended for surveying purposes. The board ruled he was surveying without a license. The operator is now suing the board and accusing them of violating his First Amendment rights of free speech.

This case is a high-tech example of what surveyors have faced in the past with overzealous owners of metal detectors. Many instances of low-budget outfits and even fence installers have been brought before state licensing boards because they misrepresented surveying services.

It should also be noted that survey field crews who use their equipment during off hours to help family or friends with property location without their licensed supervisor’s knowledge face the same consequences. While the “corner finders” are somewhat harmless and get a slap on the wrist from licensing boards, it is the high-tech offenders who are creating much of the harm to the public.

These situations with unlicensed surveying practices have greatly increased simply because of the available technology and low cost of entry. While GNSS receivers, robotic total stations, and associated data collectors are still quite expensive, new remote-sensing applications are being produced using consumer-grade equipment and advancing software. As technology continues to increase based upon miniaturization and capability, the costs also continue to decrease based upon volume of sales.

Can I get that UAV in purple like my phone?

Illustration: jemastock/iStock/Getty Images Plus/Getty Images

Leading the charge into non-licensed use of new technology is the UAV and the new standard use of GPS technology within its guidance system of reasonably priced units. Hobby planes and helicopters have been around for years but required lots of skill and space to fly and were quite expensive. The invention of the multi-rotor UAV with integrated GPS has created an easy-to-fly vehicle with lots of capability.

Couple this new vehicle with a high-resolution camera for photos and video; now it allows amateurs to be aerial cinematographers. Image storage space is not an issue due to increased SD card capacity and speed.

A well-built UAV with all these capabilities is now very affordable and available everywhere. This revolution has led to larger format platforms with more rotors and heavier payloads for more sophisticated cameras and sensors. Once you have the photos and video, now you must do something with them.

The advancement of software technology for processing photos, video, and remote sensing modules has become the hottest ticket in site modeling. The combination of the UAV’s capability and the software’s output enables trained pilots and software technicians to provide orthometric-based imagery. This imagery was previously completed by airplanes and cameras costing hundreds of thousands of dollars and processed by technicians on high-end computers using years of skill and experience.

This entire operation can now be completed by one person with less than a $5,000 initial investment. This is a far cry from the funding needed in years past to outfit a survey vehicle with the necessary equipment and personnel to do this same project.

Enter the FAA and new rules for flying unmanned aircraft. After much consideration, the FAA instituted guidelines for flying UAVs along with requiring a pilot’s certification to fly for commercial purposes. They also specified limits to UAV sizes and payloads, and limited flights to 400 feet above the ground.

Many companies have purchased UAVs to provide aerial photos of their own facilities and projects, but fail to realize that publishing their images or videos qualifies them as a commercial user. Unfortunately, these regulations are much like driving a car without a license or insurance — it is only against the law if one is caught.

The iPhone 12 Pro’s lidar scanner

Another technology that will be catching on soon is lidar imagery from smartphones. The Apple iPhone 12 Pro and Pro Max contain sensors capable of capturing lidar data that is easily imported into computer drafting software. Several phone apps are also available for integrating this data into survey drawings. Geospatial data is literally at your fingertips.

50 states, 50 rulebooks

Rules and policies are put in place to regulate various professions and surveying is no different. The goal of these rules is simply to protect the public. Unlawful practice by non-licensed and/or non-qualified persons is a detriment to public safety.

The question is often raised about professional surveying licensure and the ability to practice in multiple states. Each state differs in statutory rules regarding boundary surveys. The colonial states (and Texas) follow a metes-and-bounds standard while the remaining states generally adopt a PLSS rule. Local surveying methods, terrain challenges and early settlers often affected the statutes enacted by each state, therefore variations in licensing must be applied to applicants.

However, the guiding principles for land surveyors remain the same in all states to protect the public. Boundary establishment and retracement is the sole responsibility of licensed land surveyors.

The tools of the trade are a completely different matter. Controlling the surveying services would be easier if the equipment and supplies necessary to do the work were only available to licensees, but the free market will never let that happen. If a company has $30,000 and wants a robotic total station but has no surveying license, the dealer will not stop the sale. When we drop the price tag to an $800 UAV purchase for performing aerial photography, no one bats an eye. As the cost of equipment continues to fall, the number of unlicensed users will climb.

Photo: Francesco Scatena/iStock/Getty Images Plus/Getty Images

‘Men have become the tools of their tools’ (Henry David Thoreau)

The point of this topic is that surveying is not about the tools necessary to complete the task. Surveyors carried out their work for thousands of years before electronic instruments and can continue to do so if they choose. The advancement of the equipment and the technology has made it easier for surveyors to do their work, but the true meaning of the task lies within the profession.

Boundary analysis and determination is the responsibility of land surveyors. Data collection for that analysis can be completed by technicians using a variety of measuring tools. The team works together to complete the surveying process.

Anyone can buy the tools; that, however, does not make them qualified to use them properly. It is not reasonable for one to buy a scalpel and offer brain surgery with a disclaimer. Ask any surveyor; there are some boundary retracements that are the equivalent of brain surgery. And we do not get to put a disclaimer on it.

May 5, 2021
Smart surveying in the Outback

When someone imagines the Australian outback, they’re picturing Australia’s largest state, Western Australia (WA), which occupies an entire third of the continent.

Nearly all WA residents live in Perth, with the rest of WA reminiscent of the United States’ historic Wild West — sparsely populated towns with little infrastructure. That wild beauty and remoteness can also make surveying a less-than-beautiful experience.

“The outback of WA is a real test on my adaptability and logistics skills,” said Phil Richards, a professional surveyor and associate director with Perth-based RM Surveys. “It can take 1.5 days to get to your first site and once there, you’re totally isolated with no resources — and climate conditions that can range from 0 to 50 degrees Celsius. The sparse, rugged road systems make navigating anywhere a long journey. And if the weather turns bad on your job and you didn’t plan well, you could be completely stranded.”

Technological challenges that add to the complexity: limited mobile phone service, time-consuming RTK base station setups, inconsistent RTK cellular or radio communication, and geodetic control points that are difficult to access.

Advances in precise point positioning (PPP) technology, however, have been helping to resolve these obstacles and enable surveyors to optimize their real-time productivity without sacrificing accuracy. For Richards, who specializes in remote surveying work, this modern GNSS enhancement has helped bring a little tameness to the wilds of WA, enabling him to increase data collection efficiencies, reduce costs and boost the company’s bottom line.

Camp breakfast: The R10 receiver rests on a spur while Phil Richards dines out. (Photo: Trimble)

The case for a new approach

With his aptitude for remote surveying, much of Richards’ project work in WA has been in support of heavily active mining companies. For example, for the past 15 years, one iron ore producer has contracted him to travel more than 600 kilometers from Perth to measure exploratory drill hole collars. Drill collars, the remnants of drilling activity, are 3-millimeter-thick segments of PVC, about 150 mm in diameter, which protrude about 300 mm out of the ground, typically at a 60-degree angle. Measuring the center of that above-surface collar is a crucial stage in the exploration process to enable the client to develop a geological model of the mineral resource underground.

Managing 10 prospect sites across 300 km, the number of drill holes can vary from year to year, but there can be as many as 100 holes spread out over a few prospects at a time. Since 2007, Richards has been using Trimble R8 and, more recently, Trimble R10 GNSS receivers and RTK technology to acquire the drill-collar measurements.

On average, each prospect is 5 km by 2 km and has its own coordinate network. Depending on the number of collars and the distance to each, Richards would set up between two and nine RTK base stations on known control points to set project control. Using his Trimble GNSS receiver, he’d either drive or walk to each drill collar, set the foot of the range pole on the center of the collar at ground level, take a reading and record the measurement in Trimble Access field software on a Trimble TSC3 controller. Although the need for multiple base stations had added hours onto the projects, the RTK method consistently provided the needed accuracy.

X hits the spot

In 2015, the iron ore company restructured its mineral exploration program. Rather than drill numerous exploratory holes across a few prospects, the new focus was to drill fewer holes spread over the entire project area. That was going to be problematic for Richards’ traditional RTK routine.

“Previously, when it was predominantly surveying and less traveling, the RTK approach worked well for the project, even though setting up base stations is time consuming,” said Richards. “But when that switched to less surveying and more traveling, continuing with RTK was going to increase costs because each time I have to set up my base station, that’s an extra hour. If I have 10 drill-collar zones, that’s 10 hours. And if my base station is 10 minutes away, it adds more time and expense if I have a problem with it, or I can’t get a reliable signal, and I have to travel back to it to fix it or move it. The reduced number of collars and the increased distances between them required a more efficient method to make the project profitable.”

Taking the R10 off the vehicle mount. (Photo: Trimble)

Richards decided to test Trimble’s CenterPoint RTX correction service as an alternative. CenterPoint RTX is built on a network of GNSS tracking stations around the world that stream multi-frequency, multi-constellation data to the company’s network control centers. Advanced data processing algorithms analyze the three main error sources: satellite orbits, clock offsets and atmospheric effects, and develop models and correction data. This information is delivered to GNSS rovers via L-band satellite communications. The rover combines the correction data with its own satellite observations to produce accurate positions.

Richards ran five trials in conjunction with varied exploration surveys at test sites across 1,000 km of terrain. He took RTX measurements of survey control points with his R10 and compared them to the same positions acquired with RTK. Although the CenterPoint RTX can take up to 15 minutes to reach sub-2-centimeter horizontal accuracy in WA, Richards said the technology regularly delivered on performance. Most importantly, this technique enabled him to work without a base station and obtain real-time GNSS positions with centimeter accuracy even in isolated WA.

Integrating Trimble’s CenterPoint RTX into his workflows enabled Richard to use a single GNSS receiver system, much like working within the VRS networks available in the more populated areas of Australia.

Into the Outback

For the 2019 campaign, Richards and a colleague were contracted to acquire accurate 3D positions for 13 drill-collar holes stretched across two major prospects about 150 km apart. Their area of interest was 700 km northeast of Perth.

Within a 15-km-wide area, they had to acquire measurements for eight drill-collar holes. They calibrated the R10 receiver to the nearest control point to tie into the site’s coordinate system and moved through the area, methodically recording the positions of each collar hole. Despite the rough terrain, they finished both prospect sites in 1.5 days, compared to 2.5 days had they used RTK.

“Given the project format, with so much travel time and less surveying time, RTX is really the only way to do it,” Richards said. “It’s far quicker than setting up base stations — I saved 50% of the time using RTX on this campaign. I’m more efficient; I’m able to keep costs down; and I have the confidence in the system that I know I’ll deliver on accuracy. It’s hard to justify using any other method.”

Featured photo: Trimble

July 23, 2020
Surveying and COVID-19: A lesson in essential services
Open space: the final frontier. These are the voyages of the professional surveyor and their crew. Their mission: to explore and survey strange new lands. To retrace old boundaries and to create new parcels and subdivisions. To boldly go where no one has gone before (unless it has been previously surveyed and platted…)!

With a nod to Star Trek fans (and apologies to Mr. Roddenberry), the surveyor has been the terrestrial version of the Captain Kirk and Science Officer Spock, exploring existing and uncharted territories. While most surveys completed in the modern day are retracements of previous parcels, there are still areas where surveyors are completing various tasks where no one has been before.

There are very few instances where a survey is performed near others. By this simple fact, one can argue that the surveyor is the original social distancer. The real question, however, lies within the determination of the value of the surveyor and if the work we perform is an “essential service.”

This article is not attempting to debate the value of the surveyor versus all the first responders, doctors, nurses, healthcare personnel and the hardworking employees doing their best to keep up with our basic needs. We are here to discuss the challenges faced by the surveyor and how technology has provided much-needed tools for crossing this abyss of doom and despair called COVID-19.

But first, let us talk about how we arrived at this extraordinary time for nearly everyone on the planet.

Photo: LeoPatrizi/E+/Getty Images

Worldwide upheaval or some close facsimile thereof

Every generation has a historical event, moment or era for which they remember exactly what they were doing:
- “Greatest” generation (born before 1924): the Stock Market crash of 1929 and subsequent depression
- “Silent” generation (born 1925-1945): Pearl Harbor and World War II
- Baby Boomers (born 1946-1964): Korean War, the Kennedy assassination, the Moon landing and the Vietnam War
- Generation X (born 1965-1980): Reagan assassination attempt, Challenger explosion, death of Princess Diana
- Millennials (born 1981-1996): 9/11, Aurora and Sandy Hook shootings
Unfortunately, the series of events leading up to the nationwide shutdown because of the COVID-19 pandemic will unseat most of those events and eras. While previous pandemics (for instance, the Spanish flu of 1918) struck and killed many more people, the mobility of today’s population coupled with instantaneous media coverage provides a much different environment for this situation.

Image: CDC.gov

Obviously, we are not alone, and this virus has spared few countries and races. Different cultures across the globe have adapted for the pandemic in a variety of ways, and the U.S. has faced the same challenges across our diverse environments.

Depending on where one is located, they face a different set of challenges due to the pandemic. Several heavily populated urban areas are subject to a strict lockdown while states with mostly rural areas are less restrictive. One size does not fit all when dealing with limiting public exposure to others, but let us leave the debate of how much restriction is needed to the scientists and public officials. Many today do not agree with the rules we have been dealt with in going about with our lives. That is a discussion for another time and different forum.

Instead, let us discuss what we face going forward with our “new reality” of some form of social distancing and how the need for surveying and geospatial information remains for a large portion of this world. We must simply adapt to this situation with the adoption of new technologies and a revamped workflow.

Everything changes, whether we like it or not

The surveying profession is not unlike many other service-oriented and public-serving occupations, even with most of the field work being performed in solitude. We still deal with clients, governmental agencies, other consultants and the public.

The COVID-19 pandemic has changed the way we are now interacting with those outside partners with technological advances and modified communication conduits. Many of these methods existed well before this situation, but the rapid advancement of the pandemic forced many companies and employees into adapting very quickly.

Surveyors are no different, so let us run through the changes we have seen within the industry.

Project communication

The biggest challenge facing most surveyors in dealing with the pandemic atmosphere has been communication. Whether it is with employees, clients, government agencies or other consultants, communication has been affected mostly because of the elimination of face-to-face opportunities.

Technology to allow remote communication has existed for many years, but not many of us have taken advantage of it because of the convenience of in-person interaction. Who does not want to leave the office to meet with a client, shake their hand and close the deal? Or have the client come to your office and go over the intricacies of a complex survey?

Regardless of whether one is introverted or extroverted, human contact has always helped establish and solidify relationships. For most of us, this is how business has always been done, be it your client or your employees.

Obviously, the biggest area affected has been daily interaction with employees. Controlling workflow, handling projects and troubleshooting any situation is more difficult when the team is not physically in the same location. If a team member is overwhelmed, another one can immediate meet with them and help. Work is easily passed between teammates with little effort.

But working remotely? That takes more effort, consideration and technology to accomplish. Yes, video conferencing has been in place for many years, but mostly in large companies and only implemented it in a dedicated conference room. Not many employees were previously afforded a webcam, microphone and speakers along with the necessary software; all of these components are now standard issue. For many, programs like Zoom, Skype and Microsoft Teams are now a critical communication tool for timely and efficient sharing of information.

What about communication with field crews? Many would say that even a pandemic would not change how we stay in touch with field crews, but even these relationships have been affected. While there are survey companies operating with limited physical contact as a norm (large firms with projects regionally or nationwide), most surveyors still have a substantial amount of direct communication between field and office. This situation has forced many firms to take precautions, with crew members only handling specific pieces of equipment or performing a thorough cleaning if sharing during a project.

Project documents and files have typically been been handled manually with some electronic data files being transferred via email or internet. Depending on the size of the original document, having a full-size paper copy of a previous survey or subdivision plat has advantages to looking at a PDF image on a tablet or computer screen while in the field. Many companies outfit their field crews with 11 x 17-inch printers to be able to print larger detailed areas of bigger documents. Additional care must be taken if these items will still be used for field operations.

Image: Tim Burch

The transfer of data between office and field has become faster, more efficient and safer with technology. As data collectors have become more capable, direct connections via the internet to cloud storage is making transfer of project files and photos faster and more secure by providing immediate backup to guard against data loss. What used to take a trip to the office, connecting to a computer and downloading is now done in a matter of minutes without leaving the job site.

Field personnel are also benefiting from technology within our devices. Apps like FaceTime and programs like Microsoft Teams provide a gateway to video chatting so teammates can discuss projects in real time. Shared pictures, computer screens and face-to-face interaction provides an avenue to more effective communication and enhancing relationships between team members.

The pandemic has forced many surveyors to adapt and learn several new apps and programs to connect in new ways; however, this pandemic has also affected how we go about our field operations, too.

Enhanced data collection

Not many of the surveyor’s field activities are affected because of social distancing requirements, but the pandemic has forced our profession to be compliant with the new rules in case we are in proximity with others. Newer technology, using both terrestrial and aerial platforms, are now being utilized by more surveyors for their data collection needs.

Train employees now. As many companies have seen a slowdown in work due to pullbacks from projects moving forward, now is the time to get employees trained with the new technology and software to be better prepared for when the market comes back.

Using photogrammetry tools. Photogrammetry, lidar and laser-scanning systems are being purchased and implemented for everyday use and not just “special” projects with larger budgets. Not only are surveyors finding it keeps them further away from other people, it also allows for more efficient data collection and representation of existing conditions.

Flying unmanned aerial vehicles. UAVs continue to grow in popularity, and like the other technology discussed above, many firms are investing in becoming remote pilots and implementing aerial photography and lidar into their workflow. Previously, most surveyors (and the general public) would use Google Earth, Bing and other resources for aerial imagery to gain a better perspective on their project sites. Vendors are coming out with aerial products with more recent flights at a higher resolution, but do not offer the ability to extract reliable topographic data easily. In-house UAVs provide more flexibility and control over the information needed, and many are using their downtime to become familiar with aerial products.

Photo: GPS World

Dipping toes into remote sensing. Another sector of surveying equipment seeing increased use during this situation are new total stations with remote-sensing capability. Many surveyors may not have the need for a standalone laser or lidar scanner, so several manufacturers have introduced a total station that provides limited remote sensing for everyday use. While the built-in scanner is not nearly as robust as a traditional remote-sensing unit, it provides enough capability and accuracy for most users. This intermediate step of remote sensing helps a firm decide how much scanning they will produce and if an investment in a full function unit is right for them.

Upgrading GNSS receivers. We would be amiss if we did not mention that more surveyors are now upgrading their GNSS receivers to take advantage of more constellations, integration with IMUs and increased computing power of the latest data collectors. Some surveyors who are not as economically affected during this pandemic are taking advantage of great deals on new equipment and using this time to increase their capability and efficiency. As more satellite vehicles become available, the ability to gain accurate and precise locations is better than ever, so staying ahead of technology is still important in these times. We will continue to see more gains with L5 and L1C signals from the new GPS Block III satellites within the next few years, so staying current now is very important.

QA/QC — The electronic method

One trouble spot seen within the new paradigm is the ability to provide a thorough quality assurance/quality control (QA/QC) process on all surveying operations. Without the ability to print/plot original surveys at full scale, it becomes a more difficult procedure to review and analyze information on a computer screen.

The monitors used for drafting and calculations are getting bigger, but studies have shown the human eye will focus differently on an electronic screen compared to a survey on paper. There must be many other professions and occupations using similar technology who have yet to solve the QA/QC dilemma. Hopefully, our industry will find a way to help address this issue and provide guidance.

Image: Tim Burch

More connected than ever, yet still so alone

The COVID-19 pandemic of 2020 (let us hope that is all it encumbers) will be forever etched in our memories as frightening and unbelievable. More than 100 years has past since the last pandemic of this proportion has overwhelmed our population. We are much more advanced in our education of health, medicines and technology than the previous event, yet we were caught off-guard by the speed in which the virus spread throughout our lands. It taxed most of our health infrastructure beyond its limits and took its toll emotionally and financially to most of the population.

We were forced to adapt very quickly to a new norm of working remotely and independently of our co-workers and teammates. Did it hurt our productivity and profitability initially? Absolutely. Were our employees forced to learn new ways of doing their work and communicating by other means. Yes, they did. Was there a need for rapid troubleshooting of new procedures and task management? Of course. Has every transition of remote work been a success story? I doubt it, but it was not for lack of trying.

We are doing the best we can, and the surveying profession is rapidly trying to adapt. Like the rest of the world, the surveying profession will not be the same coming out of the restrictions placed upon us because of the pandemic. We have learned more about ourselves and how capable we are with tools we have. We also learned how we will transition with these skills into new technology not invented yet.

Surveyors are a tough bunch, so the social distancing and adaptation required to survive the COVID-19 pandemic of 2020 — while not easy by any stretch — has been handled with grace and professionalism. I would say to bring on the next one, but would rather this pandemic be in our rearview mirror quickly and not see anything like it ever again.
May 6, 2020
What Gen X means for the future of surveying
Photo: iStock.com/Georgijevic

The surveying profession has come to a crossroads, and is divided amongst itself to boot. A gap exists within the profession, and yes it is a generation gap, based on how technology has evolved and how the different generations experience it differently. In this column I explore the histories both of the generations and the technology to reach conclusions on how best to move forward — together.

Surveyors now have more tools than ever before available to them to perform their tasks. But surveyors of different ages regard these tools differently. Not to put too fine a point on it, the younger porfessionals among us feel their creativity and desire to further the profession is being stifled by the group who is supposed to be leading and mentoring them.

Why is this crucial to consider? Because these are the future users, purchasers and adopters of geospatial equipment and software, and the future setters of industry standards. All involved, from manufacturers to distributors to surveyors themselves, would do well to think deeply upon this.

As we enter the final stretch of the 21^st century’s second decade, many things have changed since the Y2K scare and the proliferation of the Interweb. From deregulation of the surveying profession to changing coordinate systems and datums, the surveying profession faces many challenges in 2019. One of the biggest challenges we face has nothing — yet everything — to do with technology.

Talented people are necessary to grow our profession. We are falling well short of having enough to keep up with demand. Sounds like a simple problem; just hire more surveyors and technicians. This sounds easy, but several roadblocks confront us.

A select few still invest in their surveying future by going to college to get a degree and eventually become a licensed surveyor. These individuals find, however, that the road to success has lots of potholes along the way, just as their elder predecessors did.

Recently, I participated in a group discussion with the National Society of Professional Surveyors (NSPS) Young Surveyors Network to discuss surveying, technology and the young surveyor’s role in promoting future career opportunities. This discussion was part of Network’s series of meetings and seminars held in parallel with the main NSPS Spring Business Meetings.

It was great to see the higher proportion of women in the young surveyor group than in the typical professional society meeting. Their feedback was consistent with that of the young men in the group. All together, their perspectives led me to write this article.

While I think of myself as still “young-ish” (in my early 50s), being the oldest participant in that group was intimidating, to say the least. These young technicians and surveyors are driven and focused, yet they seek the same feedback and mentoring that I desired when I was their age.

In the weeks after that meeting, some of the items discussed continued to resonate with me and forced me to reflect on my own experiences and career path. To be fair to them and truly understand their views on today’s surveying profession, I needed to look beyond the profession, policies and procedures to which I hold fast in my ethical approach to the craft. These younger generations have been exposed to a completely different world than the one I remember fondly, and the world they grew up in has subjected them to challenges to which I cannot relate. To help explain the conundrum of trying to find a way to relate, we need to take a step back and look at not just generational values but how the many industrial revolutions have affected us as well.

TALKING ‘BOUT MY GENERATION

The first part of my research to help me find a way to step into the shoes of these young surveyors was to look at past generations and how they relate to each other. Going back to the turn of the 19^th century, we get the following breakdown:

Traditionalists or Silent Generation: Born before 1945

This timeframe contains sub-groups including the “lost generation of 1914,” the “interbellum” and the “greatest generation.” Alaska and Hawaii were not included in the United States during this period. Most of the country west of the Colonial states was subject to the government Public Land Survey System started in the early 1800s. The Great Depression took its toll on much of the population, and previously rapid expansion slowed to a standstill.

Baby Boomers: Born 1946 – 1964

World War II changed the world. Soldiers returning from military duty to start or resume families accelerated population growth and a departure from traditional social attitudes. Two-income families emerged, and prosperity ruled for many years. Surveyors, teaming with civil engineers, helped fuel an unprecedented explosion of real estate expansion through planned developments across the country.

Generation X: Born 1965 – 1976

The children of the fast and free-living Baby Boomers grew up to become the Gen Xers. They were the first “latchkey” kids, more likely to be raised by divorced or remarried parents. As young adults, in their effort to enhance their lifestyle more than their parents, they did many things to the extreme with no consideration of cost. This led to massive real estate developments, “McMansions” and increased debt. Surveying continued to flourish but most growth was enjoyed by engineering firms who absorbed surveyors to expand their services.

Millennials or Gen Y: Born 1977 – 1995

This group is often labeled as the “Peter Pan” generation for its predisposition to put off typical adulthood norms like marriage, having children and buying real estate. They have a propensity to be more mobile and nomadic, as they take advantage of technology and rapidly changing environmental factors. With this generation we find the slowdown in career choices towards surveying, even though technology and spatial data acquisition have exploded with potential.

Gen Z, iGen, or Centennials: Born 1996 – Current

This generation was born into technology, and it affects everything they do. From infancy they were experienced soothing music, dancing screens, interactive toys, and dolls teaching them new skills. This generation doesn’t know of a world without computers, cellphones, GPS-based maps or high-speed internet. Surveying has also benefitted from the technology explosion but it hasn’t captured the imagination of this generation sufficiently to develop future practitioners.

YOU SAY YOU WANT A REVOLUTION. WELL, YOU KNOW…

The generational differences only tell part of the story. Each one faced its own challenges when it came to technology (or lack thereof), societal standards, and other facets of their respective eras. A succession of several Industrial Revolutions brought new tools for completing a wide array of tasks and procedures. Here is a summary of each of them in chronological order:

First Industrial Revolution (1784)

Mechanical production via water and steam power led the way during the late 1700s and began a trend of radical changes in the ability to create larger items. The Gunter chain and surveyor’s compass, both invented in the 1600s, were the mainstay of measuring tools during this time period.

Second Industrial Revolution (1870)

Mass production and increases in labor opportunities coupled with the adaptation of electricity in many areas enabled people to flourish like no other time to date. The optical theodolite with horizontal angle measurement was introduced and then mass produced in the late 1800s to help surveyors make more progress westward.

Third Industrial Revolution (1969)

A significant leap forward in technology occurred with the invention of the microprocessor in the late 1950s, followed quickly by rapid development of electronic machines designed to follow manual instructions. Programmable controllers and devices were born from the fast-paced development of sophisticated miniaturized circuitry. These developments were used to create measurement devices for sending infrared and visible light waves across long distances. In the late 1970s, technological advancements led to the development of electronic theodolites or total stations. These instruments were the first to be able to electronically determine the horizontal and vertical angles normally read manually by the operator, and to combine this data with electronic distance measurement. Further development created methods of storing this data electronically for input into computer calculation and drafting programs.

Fourth Industrial Revolution (Current)

Industry experts differ as to when the Fourth Revolution began, but all agree we have turned the corner and are now fully entrenched into a new realm. Further miniaturization of computer chips, advanced sensors and storage, and robotic mechanisms have introduced a new reality for everyone, including the surveyor. Today’s practitioner has many sophisticated tools available for work, including GNSS receivers, laser or LiDAR scanners, UAVs with a multitude of sensors, hydrographic vehicles with single and multi-beam fathometers, and many more instruments currently under development.

Surveyors now have more tools than ever available to perform their tasks. Now we must cross-reference these revolutions with the practitioners from the various generations to help us understand upon which road the profession is headed.

TECHNOLOGY MEETS GENERATIONAL DIFFERENCES; WHAT COULD GO WRONG?

One thing that stood out in my aforementioned discussion with the young surveyors’ group was how much they were embracing technology not just in their every day lives and communication, but how they understood the enhanced abilities of the latest tech and instruments for surveying. They see the value in large data, point clouds and BIM (building information modeling) needed for industry use.

The general consensus from this group was that my generation (Gen X) and earlier (Baby Boomers) are easily dismissive of their enthusiasm for incorporating these new technologies into our workflow simply as ways to shortcut old methods done by more labor-intensive means. While I initially tried, myself, to dismiss this suggestion, further research has only proven their point: their creativity and desire to further the profession is indeed being stifled by the group that should be leading and mentoring them.

Cross-correlating the generations with their various personalities and quirks with the amalgamations of industrial revolutions turns up some interesting results. Gen Xers and earlier surveyors were strictly taught by their managers and mentors that both historical data and original monuments are sacred and not to be denied. This information was derived from the most basic of survey instruments and measuring equipment, with accuracy that is not acceptable by today’s standards.

But the tradition remained: if it was good enough for our forefathers to establish the early frontier, then more accurate measuring devices are simply overkill. New sophisticated robotic total stations, GNSS receivers and robust data collectors available as a result of the Third Industrial Revolution are shiny objects that stand in the way of “good surveying,” in the opinion of the elder surveyors.

Millennial surveyors, meanwhile, look at the world with a different vision and much different solutions. Most of them were not exposed to televisions with just three channels, telephones mounted on walls, or kitchens without microwave ovens, to just to name a few “antiquities.” Their families have always owned a computer and the library is a place where you go to study. Research isn’t looking in an encyclopedia; you Google. They embracw cellphones with a multitude of apps and functions, including location services within a few feet, practically as extensions of themselves.

The equipment produced for surveyors today is well within their wheelhouse as it maps a multitude of points and features in a blink of an eye. Accuracy and detail are no longer an issue — but adapting that data to legacy deeds and maps is where us old timers can help bridge the gap.

Another problem that has proven to be a yawning void between the generations is the remnants of the economic slowdown of 2007-2012. Many Baby Boomer and Gen X surveyors learned to do more with less. Times were tough and we couldn’t afford to upgrade to the latest versions of total stations, GNSS, software, or invest in new technologies like laser scanning. There was also an exodus of technicians simply because there was no work in surveying for the time period, and they found employment in other professions. That left a void in who was doing the work (now being completed by upper level surveyors with older skill sets), and having no younger personnel to train and groom for future career growth.

There were many technological advancements during that time frame but overall the industry suffered because of the economic downturn. The Millennials, most of whom were too young to be employed during this period, now are faced with working for an older profession that couldn’t afford to stay current with technology and who have trouble relating to the motivations of the younger generation.

CAN’T WE ALL JUST GET ALONG?

I believe the surveying profession is at a crossroads, one based upon the gap caused by the generation / technology combination described above. Steps must be taken to rectify this. Here are a few of the pathways to closing the gap and becoming a solid profession for the future:
1. Embrace the mentor/mentee relationship, but be open to reversing the roles. The younger generations have a handle on the latest technology, so us old timers need to be more willing to close our mouths and open our ears and minds.
2. Create more opportunities for younger surveyors to participate in organizations so they can also be influencers. Keep in mind that they don’t typically like to “belong” to an organization, so adapt our professional groups and keep their interests in mind.
3. Change the way we communicate. Many Baby Boomers / Gen X members are critical of the younger generations and social media, yet this trend shows no sign, at all, of stopping. Smartphones are here to stay, so let’s learn to adapt, to remain in step with the youngsters.
4. Be willing to invest in new and emerging technology. Who know where the next radical survey technique will come from if you don’t have an open mind and checkbook? Invest not only in equipment but your young staff’s future.
5. Encourage younger staff to get involved in something. Anything. Social interaction can lead to better communication skills and expose them to more business situations. Don’t push them in over their head,s but get them to be “uncomfortable” occasionally. They will thank you for it.
Many professions and occupations will suffer in the next 3–5 years because of attrition through retirement, incapacitation and death. These workforces will lose 20–40% of their workers. Those left will have to pick up the slack and then some. We need to either

A) hire a lot more surveyors, or

B) figure out how to make it work with less bodies.

The conversation that took place in that meeting room with the young surveyors has made a deep impression on me and has changed my focus on the future of surveying. How does this apply to an article in a geospatial publication? Simple: these are the future users, purchasers and adopters of geospatial equipment and software, and the setters of industry standards.

The younger generation understands how to use today’s technology, and the surveying profession overall needs to embrace that fact. The technology won’t mean a thing if we don’t have the bright minds to use it to its full potential.

So I ask you again to embrace, encourage and listen to the young surveyors; they will thank you for it.
July 3, 2019
Surveyors and smart cities — partners in technology

Image: Celebrating200years.noaa.gov

Everywhere we turn today, the term “smart” is attached to an item or to a process. Smartphones, smart cars, smart electricity grids, smart home appliances; you name it, someone is making it a “smart” item or process. Advancement in technology has increased computing power, expanded data storage capability, and has allowed for miniaturization of circuits and processors. This forward progress has led to the creation of these smart item/processes, and together creates the real possibility of making many of life’s tasks and normal operations more automated. This potential automation also brings new systems monitoring conditions of various entities and operations within our daily lives, such as increased efficiency of HVAC systems, utility metering that adjusts to our patterns of consumption and landscape watering that only provides water when needed.

In addition to the personal systems now being controlled with these machines, there is now revitalized interest in the creation of “smart cities.” The concept of this type of a civilized urban metropolis once existed only in science fiction, but technology has brought this concept to life in ways not imagined by the best of those writers. Surveyors have a big role in the development, installation and maintenance of these cities, so let us spend some time digging into the element that go into our future environments.

What is a smart city?

For those old enough to remember, the concept of a smart city only existed on “The Jetsons” cartoon from the early 1960’s, with cities in the sky, flying cars and some technological advancements that do exist today. While Orbit City may not come to fruition in the next several generations, many of the concepts of a smart city are taking shape today.

For the definition of a smart city, we go to the Google search engine and find the following entry from Internetofthingsagenda.techtarget.com:
A smart city is a municipality that uses information and communication technologies to increase operational efficiency, share information with the public and improve both the quality of government services and citizen welfare.

Establishing a smart city requires forward thinking leadership and substantial funding to be created and maintained; however, the real function lies within the computing infrastructure and collection/manipulation of large quantities of data to create an environment of efficiency and conservation. A true comprehensive system combines available historical data, a collection of sensors and data collectors transmitting real-time information, and a powerful computing system containing analytical programming with extensive database functionality.

Is smart cities technology and adoption really that important?

Population trends worldwide continue to show that urban and suburban areas are expanding while rural areas are seeing a large reduction in residence. Several factors are at play, with technology being the central reason for the migration from the farm/small towns to the bigger cities.

Statistics show that in 1960, two billion people worldwide lived in rural areas while one billion lived in urban sections. As the population has increased drastically, the percentages for each category have reversed; in 2007, the two categories were equal and by 2017, the urban sector has jumped to 4.13 billion versus the rural population of 3.4 billion.

Chart: Our World in Data

Population experts estimate by 2050, upwards of 70 percent of the world’s population will be living in urban areas. Whether this population shift goes directly to the city centers or the less dense outskirts, municipal facilities and services will need to be upgraded and expanded with the continuing trend. Add to this surge the challenge to create a more sustainable environmental infrastructure and ecosystem, and it becomes a maintenance challenge and logistical nightmare. By using technology to create smarter infrastructure monitoring and management systems, the creation of smart cities with advancing technology will be key to successful and sustainable growth for municipalities and its citizens.

One of the biggest challenges faced by most municipalities is aging infrastructure. Utility systems, including water supplies and stormwater drainage, was installed several generations ago without a plan for replacement and/or expansion. Redevelopment in older urban areas are now taxing these aging systems well beyond their initial capacity, all while these facilities begin to fail simply because of continued use well beyond their original designed life span. Municipalities are forced to spend money on repairing and modernizing the existing infrastructure before entertaining the idea of upgrading new installations to “smart city” specifications. However, many municipalities are mandating that new developments and infrastructure improvements meet these specifications so any future upgrades can include computerized systems.

All these systems, new and future, will require extensive planning and mapping to be effective and efficient to justify their expense. Surveyors, utilizing a variety of tools based around high-accuracy mapping and data collection, can provide the necessary base information for these systems.

Where does surveying fit in?

Just as computers and electronic technology has allowed many industries to evolve, the surveying profession has also advanced with new methods and equipment. Our ability to perform advanced measurements and establish positional location information is critical in providing the base data necessary for smart city services. Previous surveying, mapping and record keeping systems were sufficient for the needs of the time period. However, these historical data points were nearly impossible to place into a single database simply because of one factor: georeferencing.

The surveyor has the unique responsibility of being recognized as expert measurer and locator of physical points on the ground in relation to property and boundary rights. It is because of this distinctive role within the community that the surveyor can provide a significant role in the development of the groundwork of a smart city. The introduction and implementation of newer technology and tools has allowed the surveyor to become a valuable member of the infrastructure mapping team. It always hasn’t been this way and the surveying profession shoulders most of that blame.

Past promises: digital vs. smart

Many surveyors will make the argument that our profession has been ahead of the game for years with our data collection processes having been transformed from notes in a field book to electronic devices. Digital data, however, isn’t necessarily smart data as many factors go into establishing the difference. The physical form of the survey information has no direct correlation to the basis of the data; in this case, the records need to be based upon a spatial reference frame rather than an assumed data system.

Also on the topic of spatial reference systems, we can also address the lack of respect given to geographical information systems (GIS) from surveyors during its initial introduction and implementation. GIS was discounted as a convoluted graphical database not sophisticated enough for the high-accuracy world of surveying. Little did the surveying profession know that GIS would become the spatial basis for many mapping systems and be utilized in millions of locations worldwide. Only now does the surveying community realize that we missed the bandwagon and can help to provide the crucial link between spatial data and actual points on the ground in relation to physical improvements and property ownership.

Another digital platform not initially embraced by the surveying community is building information modeling or BIM. This software is a three-dimensional modeling program used mostly by architects and mechanical engineers for depicting and designing buildings and plumbing systems. One of the advantages of BIM versus traditional CAD is a database information link containing data regarding the entities within the BIM. Among the attributes contained with BIM are documentation, spatial reference, time, cost, operational applications, and related applications (contracts, purchasing, suppliers, procurement solutions, etc.). The existing spatial data necessary for this system can be supplied by surveyors using a variety of methods but not many have implemented the software.

Technology, availability, cost of entry and overall usefulness

Surveying instruments and measuring techniques has turned a significant corner in the past two decades. While conventional measurement methods are still used (including steel tapes, laser-based total stations, and GNSS receivers), more types of sensors are being introduced to enhance the accuracy and expand the volume of data points being collected. Scanners, using phase-based and time-of-flight methodologies, are now more popular than ever as ease of use has increased while the cost of ownership has greatly decreased. Ground-based and mobile LiDAR used to be only available to large firms and the government, but new models are being introduced at price points affordable to many surveyors. Many articles have been written regarding the lightspeed adaptation of surveying, engineering and construction firms with UAV use of photogrammetry methods to quickly map areas that were previously inaccessible and meeting standards not thought possible. We are also seeing more implementation of new scanning methods, including SLAM (simultaneous localization and mapping) using handheld and backpack devices.

The common thread for all these technologies and methods is one thing: georeferencing. What was once nearly impossible is now a reality; data collection from various methods all being located within a common horizontal coordinate and vertical datum systems. The ability to obtain literally millions of data points with high-accuracy horizontal and vertical values is phenomenal with most of the credit going to the United States Department of Defense and their implementation of the GPS. Yes, the technology of scanners and data collection would have been invented without the overall coordinate tie-in but having the ability to reference that same data to a common system is the key.

Also key to the smart city data collection methodology is the surveyor as the expert measurer. A trained and experience surveyor can lead the data collection of significant projects, including location of existing improvements and establishment of future installations. From establishment of parcel/right-of-way lines to integration of point clouds from scanners and photogrammetry, the surveyor can assemble this data together to provide the groundwork for successful analyzation and planning. By combining data from various areas of a municipality, including utility atlases, existing improvements, and future expansion plans, a database can be created in which a smart city will rely upon for oversight and monitoring. The surveyor fills a vital role to determining the accuracy and effectiveness of data like no other profession and should not be overlooked when assembling a team for the creation of a smart city.

Future opportunities

Like all technological discoveries and enhancements before, the future is bright with many possibilities to increase the effectiveness and efficiency of a smart city. More types of sensors are being introduced on a regular basis and in every way imaginable, including wireless communication, RFID tags, and microelectromechanical systems (MEMS) devices.

Image: GetKidsintoSurvey.com & www.elaineball.co.uk

One of the latest buzzwords is the “Internet of Things” (IoT), with many new devices being created to interconnect a network of web-enabled computerized devices using microprocessors, a variety of sensors and wireless communication hardware to gather, transmit and perform actions on information acquired from their environments. IoT presents advantages to users by enabling them to monitor their overall business processes and improve the customer experience. These actions can also precipitate changes to allow the company to save time and money, enhance employee productivity, integrate and adapt business models, make better business decisions, and generate more revenue.

As discussed in previous articles (GPS World March 2018 and GPS World November 2018), the next big technology to look forward to is the telecommunications upgrade to 5G. Once a full 5G network is running with extended coverage, we can look forward to new opportunities for indoor location services with similar accuracy to our existing GNSS capability.

What’s next?

The technology sector will continue to push the limits of computing speed, physical size and data capacity looking for the “next big thing.” The surveying profession has enjoyed many of the fruits of that success so one has to imagine that many more advances will be coming soon. Smart cities will continue to evolve as citizens of Earth keep migrating to the urban areas and forcing the existing infrastructure to expand or face failure. Surveyors will continue to help provide a variety of services to those citizens and municipalities, with an eye on the future for more advancing technology. I can’t wait to see what is next.

March 6, 2019
Trimble CenterPoint RTX, A Customer Story — Surveying in South Africa

A video featuring a South African veteran surveyor, telling his story of achieving 2 cm horizontal accuracy with Trimble CenterPoint RTX. Satellite-delivered, survey grade accuracy and no base station required!

Visit Trimble.com for more information.

September 1, 2018
SBG Systems releases Navsight inertial for marine surveys

SBG Systems has released the Navsight marine solution, a full high-performance inertial navigation solution designed to make surveyors’ tasks easier in both shallow and deep water.

Navsight consists of an inertial measurement unit available at two different performance levels (from shallow to deep water). According to SBG Systems, the Navsight marine solution is based on 10 years of the company’s experience in marine inertial sensing products.

Whether the IMU comes with a surface or a subsea enclosure, they are all lightweight and easy to install, the company said. Navsight connects to any computer, with no software installation. Once connected through Ethernet, the web interface guides the user to configure the solution.

A 3D view of the boat shows the entered parameters so that the user can check in real time the installation. Navsight allows quick installation and initialization thanks to new mechanical calibration module. The embedded filtering controls and validates lever arms and antenna alignment during this procedure.

Navsight Marine Solution provides high-performance motion and navigation data as well as a real-time heave accurate to 5 cm, which automatically adjusts to the wave frequency, SBG Systems said.

To allow surveying when wave frequencies are large or complex, Navsight comes with a delayed heave feature resulting in a heave accurate to up to 2-cm computed in real-time with a little delay.

If higher performance is required, the surveyor can count on SBG INS/GNSS post-processing software named Qinertia. By processing inertial and GNSS raw data forward and backward, Qinertia greatly increases accuracy especially during GNSS outages; it also fixes set up mistakes.

Highly versatile, Navsight comes as a Motion Reference Unit, providing roll, pitch and heave or as a full navigation solution with embedded tri-frequency GNSS receiver, or using an external one. Fusing inertial data with satellite position in real-time, Navsight INS offers continuous position in all conditions, such as surveying under a bridge, or during a GNSS outages due to coastal infrastructures (buildings, harbor cranes, etc.).

The Navsight Marine Solution supports RTK and every precise point positioning service (Marinestar, TerraStar, etc.). It is compatible with the main hydrographic software such as Hypack, QINSy or Teledyne PDS for seamless integration into existing workflows.

Navsight is ITAR-free. All models are available for order. Ordering information and delivery time are available from SBG Systems representatives and authorized SBG Systems dealers.

March 26, 2018
Tersus David GNSS receiver available in 7 kits
Tersus GNSS is now offering its David real-time kinematic (RTK) GNSS receiver with seven new base/rover kits.

Tersus GNSS is a provider of centimeter-accuracy GNSS RTK solutions. The Tersus David GNSS receiver with its components create an affordable solution delivering high-precision signal reception, integrated in a small, and lightweight package.

The David GNSS receiver supports GPS L1/L2, GLONASS G1/G2 and BeiDou B1/B2. With David, surveyors users can take full advantages of common platforms such as smartphones, tablets or traditional handheld modules to collect data.

Coupled with an external antenna, the Survey App and post-processing software, the David GNSS receiver is a low-cost solution for all survey applications, including real-time RTK positioning and data collection for PPK.

Four (4) GB on board an embedded multimedia card (eMMC) makes it easy to save data for post processing. The compact, IP67-rated enclosure and versatile accessories alleviate most inconveniences encountered in field work.

“The launch of David GNSS Receiver marks a major step forward for Tersus as well as for surveying professionals,” said Xiaohua Wen, founder and CEO of Tersus. “The David is a cost-efficient and palm-sized GNSS receiver. Tersus is constantly working to make each surveying task easier and more productive by providing high-quality GNSS RTK surveying equipment. Our focus is on enabling surveying professionals make data collection more convenient, post (data collection) processing more accurate, and better equipping them to do surveying in the field.”

Kits offered include:
March 16, 2018
Javad GNSS offers spoofing alert for surveyors

Spoofing — the generation of false and misleading GPS signals by “bad actors” — is becoming an increasing problem for all GPS users, and surveyors just as much as everyone else should be knowledgable and take countermeasures.

Javad GNSS has announced that spoofer detection is now available on all of its OEM boards. If the receivers equipped with such boards detect more than one correlation peak for any PRN code, they warn the user of the presence of spoofing (false signals) and identify the spoofed satellites.

The receivers then switch to other signals and sensors that are not being spoofed, to maintain accurate positioning. The user can also employ the receiver to try to identify the direction from which the spoofing signals are originating.

December 1, 2017
Surveyors’ coordinate systems for 2022 and beyond
Time.

Ask anyone what time means to them, and they will give you a different answer. Benjamin Franklin famously stated that “time is money.” Time for the surveyor can mean being out in the field retracing a boundary, drafting a plat or working with a client to help them see their goals achieved. Just like any other profession, time can be a friend or foe for the surveyor. We seem to run out of it more than we have an excess of it. Either way, time marches on as we go about our business.

Time, however, is changing the surveyor’s world and how we go about our methods of measurement. While it seems like a crazy concept, time is the major component requiring changes to geodetic procedural processes and how we will determine our locations in the future.

We will continue to see advances in hardware and software along with new interfaces and ways to collect and display survey data almost daily, and we will continue to deal with adaptation. However, surveyors must be ready for the next big challenge: a national horizontal and vertical adjustment of the National Spatial Reference System (NSRS) into a new standard. The North American Terrestrial Reference Frame of 2022 (NATRF2022.) is currently being developed by NGS and will replace NAD83 and NAVD88. Most surveyors will ask why we are getting ready for a historic change in datums. Easy — it’s all about time.

Expanded Variables

Just as early travelers thought the Earth was flat and learned it wasn’t through exploration and science, we are learning more everyday regarding how our world is changing. To get a better understanding of how our world is changing, NGS and the geodesy community have expanded the environmental variables of geographic location to areas including gravity, geoid undulations and geopotential data, plate tectonics and crustal evolution, and additional GNSS data analysis through satellites and continuously operating reference station (CORS) installations.

By introducing new attributes affecting coordinate data, including horizontal motions induced directly or indirectly by adjoining tectonic plates, horizontal motions induced by Global Isostatic Adjustment, other horizontal motions and all vertical motions in their entirety (per NGS NOAA Technical Report NOS NGS 62), data captured will be used to create an Intra-Frame Velocity Model (IFVM). Data following this format will be now be used to monitor the movement of survey positions from implementation forward. The key factor in which all the data is centralized is time.

My GPS World colleague David Zilkoski presented a thorough explanation (“NGS to Replace NAVD88 in 2022: What GNSS Users Need To Know) of the nuts and bolts behind the changes. Here are the basic reasons behind the new adjustment as provided by NGS:

NAD 83 and NAVD 88, although still the official horizontal and vertical datums of the National Spatial Reference System (NSRS), have been identified as having shortcomings that are best addressed through defining new horizontal and vertical datums.

Specifically, NAD 83 is non-geocentric by about 2.2 meters. Secondly, NAVD 88 is both biased (by about one-half meter) and tilted (about 1 meter coast to coast) relative to the best global geoid models available today. Both of these issues derive from the fact that both datums were defined primarily using terrestrial surveying techniques at passive geodetic survey marks. This network of survey marks deteriorate over time (both through unchecked physical movement and simple removal), and resources are not available to maintain them.

The new reference frames (geometric and geopotential) will rely primarily Global Navigation Satellite Systems (GNSS) such as the Global Positioning System (GPS) as well as an updated and time-tracked geoid model. This paradigm will be easier and more cost-effective to maintain.

Plate tectonics

These proposed changes to the NSRS, however, are based upon how much we have learned about our changing Earth using GNSS equipment and data collection. Time, as it turns out, is a big factor in how we measure and document locations. A point that is determined exactly here on this day at a specific moment will have moved due to plate tectonics and other variables to there over a period of time.

New Vertical Component

Another aspect of the datum change will be the definition of a new vertical component. Surveyors are familiar with the establishment of NGVD29 based upon mean sea level, and also NAVD88 being based upon the benchmark at Father Point/Rimouski, Quebec, Canada with reference to the International Great Lakes Datum of 1985. What science has taught us in the years beyond NAVD88 is that there is a greater force at play when it comes to the vertical piece of geolocation: gravity.

Yes, gravity keeps us on the ground and causes water to flow downhill, but the development of gravitational studies has led to incredible discoveries of how gravity affects elevation. It was always assumed that the gravitational pull on the earth was uniform worldwide, but with the development of instruments that can measure and map the variations in gravity, NGS will be redefining the vertical datum through a program called GRAV-D. NGS is currently flying in various portions of the U.S. and is scheduled to be completed by 2021 in order to roll out with the new horizontal program in 2022.

So, it turns out that time has been affecting not just our productivity but also our positions on the earth. Another famous quote by Paulo Coelho does hold true: “Time neither moves nor is stationary. Time changes.” Time has passed since this article began; did you feel the earth move?

What about our survey monuments and state plane coordinates?

For many surveyors, the main question is simple: why now? What is so bad with our existing NAD83 and NAVD88 datums?

Map courtesy of GISGeography, at http://gisgeography.com/state-plane-coordinate-system-spcs/

The reason is very simple; staying current with our favorite tool in the toolbox: GNSS. Surveyors have always been about “monuments” and perpetuation of data from established points located on the face of the Earth with published and/or known values. This concept has become even more important to the surveying community once the proliferation of geographic-based and state plane coordinate data was published for all to utilize. I touched on the surveyor’s use and data collection/perpetuation of location values in a past column (GPS World November 2016). As long as NGS updated the national database with more information and a simple adjustment every so often, life was good and simple.

But now we have worlds colliding; static monuments with published horizontal and vertical values in one corner, while in the other corner is the new paradigm of ever shifting crustal plates and changing positional values monitored by GNSS data through satellites and a network of CORS located worldwide.

This situation makes me harken back to one of my favorite “Ghostbusters” lines from Bill Murray’s character, Dr. Peter Venkman: “Human sacrifice, dogs and cats living together – mass hysteria…”

Okay, maybe it won’t be quite that bad but there will be many surveyors that will have trouble wrapping their minds around the new concept of “moving monuments.” Our reliance on state plane coordinate systems (SPCS) is at an all-time high with the sharing of data by various parties being more seamless than ever. The notion that a permanent monument’s positional values will be constantly changing is a head-spinner to most.

NGS has also stated that their new system and procedures will not maintain data values for SPCS (see NGS State Plane Flyer). There are currently 125 SPCS zones and 3235 county systems throughout the US and territories in place that rely on NGS data as the main framework, so having tools for reference and conversion in place will be crucial. Thus, it will be a herculean task to create a procedure/process to easily pass coordinate values between our many static systems worldwide and the new dynamic but very robust system underway from NGS.

Based upon information currently available about the NAD2022 system, it would be more efficient for all those who use geolocation data to modify their thinking to adapt to a dynamic coordinate system. However, this is a similar situation to early scientists and geographers throwing out all references to flat-earth maps and atlases. For surveyors in the twilight of their careers, these are radical items to consider and a far cry from the standardized chain and theodolite. (Maybe there will be mass hysteria…)

The good news is that we have very intelligent people in the surveying and geodetic community who are working on solutions for the masses. The beauty of newer technology is how quickly hardware and software can be adapted to fit these new data conditions. Getting the word out on these changes and educating our profession will be a key factor to its success.

Further Refinement of Coordinate Systems

While the use of GNSS has enabled the discovery of time as a significant variable in geolocation, it has also expanded out coverage area of coordinate systems to much larger areas. Distances that could not be computed prior to GNSS are now easily attained and large projects can be managed within a common coordinate system. County, regional and state agencies can now create large-scale GIS databases that utilize a single coordinate system as well.

However, there are two differing tracks being formed with the continued development of the new datum by NGS. While the new datum will become more precise and predictable, there are movements in opposing camps to make changes in user coordinate in the furthest possible ways: statewide single zone system versus county/regional low distortion projection (LDP) systems. They both have their strengths and weaknesses, and will depend on the application of the user to choose the appropriate system.
- Most states currently have two or more zones so there potential to combine all zones into one, but a major drawback will be the loss of accuracy away from the defining points. For GIS users, this accuracy will more than adequate and will allow the merging of data from across the state into one unified system.
- Surveyors, however, are an interesting bunch in that they accept only the most accurate AND precise measurements. The growing use of LDP is rapidly changing the implementation and management of coordinate system in smaller areas such as counties and regional DOT districts.
However, both systems have a place in our surveying and mapping world. NGS has stated that while they will help with transformation software and apps, it will leave the decision of legislative standards to each state. It will be paramount that each state study what makes the most sense for its users and pass the appropriate legislation.

“The days are long but the years are short”

As I look back and realize how much has changed with modern technology and overall knowledge of our profession, it is with much anticipation how much more will change with advancements we don’t even know about yet. The electronic distance meter (EDM) was revolutionary for many surveyors and I’ve waxed poetic about my feelings regarding RTK GNSS in past columns (GPS World May 2016). Once again, however, technology and information based upon its use has revolutionized our data system.

As a profession, surveyors have embraced GNSS use and data collection from the early implementation of the system. And while the advances of UAV use, laser scanners and LiDAR along with software improvements have revolutionized data collection, these proposed coordinate improvements by NGS will bring more potential quality information into the surveyor’s hands.

And while time is money as Mr. Franklin famously stated, 2022 is just around the corner. A good friend of mine is famous for saying: “Good coordination begins with good coordinates.” The work performed by NGS is helping us do just that. The entire surveying, mapping and geodetic community has lots to accomplish to be ready for the changes from NGS. Let’s get to work.
May 3, 2017
Carlson Software Releases Surveyor2 Handheld

Carlson Surveyor2

Carlson Software has released the Carlson Surveyor2, the newest model in its Carlson Surveyor line of data collectors. The Surveyor2 is paired with Carlson’s software to provide a powerful, complete solution for surveying, stake out, construction layout, and GIS mapping, the company said.

Designed and manufactured by Juniper Systems, the Carlson Surveyor2 is built to withstand the harshest conditions, with an IP68 rating for dust and water and superb durability when dropped or exposed to cold, heat or other rugged environments.

With minimal increase in weight compared to the original Surveyor, the Surveyor2 offers greater memory and data storage, a faster, 1.0-GHz processor, and significantly improved Bluetooth range — up to 1,500 feet. The data collector also features a new QWERTY keyboard with large buttons for easy data entry, enhanced battery power with 20+ hours of runtime, and a larger, brighter display, providing excellent visibility in any lighting conditions.

The Surveyor2 runs Windows Embedded Handheld 6.5.3 and can be purchased with Carlson SurvCE 4.0, Carlson’s powerful data collection software. SurvCE offers exceptional usability, with a tab-based menu and advanced graphics for easy-to-use functionality, the company said.

“The Surveyor2 and SurvCE together create an advanced solution for surveying applications, while maintaining simplicity and ease-of-use,” said Debbie Trolson, geomatics market manager at Juniper Systems. “The Surveyor2 offers significant improvements over its predecessor, providing surveyors with the features they need to perform their work productively and effectively.”

The Surveyor2 was previewed at INTERGEO 2014.

July 8, 2015
Powerful RTK with Six Separate Engines

Screen anatomy — RTK v6.

By Matthew D. Sibole

A little more than a year ago, I became a part of a team of surveyors from across the country to offer testing and input on new technology and programing coming out of JAVAD GNSS. It has been a great honor to work along with Dr. Javad Ashjaee, the other surveyors and Javad’s staff at JAVAD GNSS. Why Javad chose me, I doubt that I will ever know. While I am proud to be a part of what Javad has dubbed “J-Team,” I have realized very quickly how little I know about GNSS. In this series of articles that I plan on putting together, I will chronicle my advances in GNSS and testing of JAVAD GNSS equipment.

As part of my testing, I have been using a JAVAD Triumph 2 base (with 4-watt external radio) and a TRIUMPH-LS rover. I had seen advertisements for this system for many months prior to becoming a member of the J-team. I was apprehensive at first with the difference in the appearance and learning the new software. However, it did not take long to realize how advanced this system, namely the TRIUMPH-LS, was.

One key feature that I use to determine the quality of my shots is the V6 engines. The V6 engines that it uses to fix the ambiguities is unlike anything I have seen in any other software or receiver. The V6 engines are six separate RTK engines running simultaneously. Basically, this is like having six separate receivers in one.

When in heavy multipath area, I tend to stay fixated on this screen. Each engine can fix at different times. When another engine gets fixed, the resulting epochs are averaged between the two fixed engines and so on with any of the other engines. (See above image.)

This is only one of many technological advancements that Javad has included in his newest receivers. Please continue to follow my articles on other advancements and general surveying practice topics.

For more information on Javad’s J-Field software, the TRIUMPH-LS or other JAVAD GNSS solutions, please feel free to visit www.javad.com, email [email protected], or call 1-888-550-5301 or 1-408-770-1770.

Matthew D. Sibole is a Professional Land Surveyor (PLS) and a member of the JAVAD GNSS J-Team.

June 19, 2015