The state of Nevada is currently the fifth largest gold producer in the world. First discovered in 1849 by prospectors on their way to the California gold rush, gold and later silver caused several booms, with production really picking up in the 1960s thanks to new metallurgical techniques which meant recovery of more gold than ever before. Looking at old mines from the 1800s with our modern perspective provides great opportunities.
Newrange Gold is bringing new things to old places at the Pamlico project, which was one of the highest-grade gold districts in Nevada in the 1880s. Records of the mine workings are lost and the workings have never been systematically studied, leaving an enormous opportunity to map, survey, and sample the old exposures. With 5 miles or more of historic mine tunnels dating from the period of 1884 to about 1928, you can understand why no-one has done it before: it would be too time-consuming and costly to do with conventional surveying.
My company, Carrington Consulting, invested in the ZEB Horizon to expedite surveying, mapping and sampling at our client company, Newrange Gold Corp., at the Pamlico project. Systematically scanning the complex, interconnected workings has generated an unprecedented 3D map of the mine workings and has resulted in greater than 50% savings to date over conventional surveying and mapping techniques.
“Our experience with the ZEB Horizon so far is vastly superior to traditional methods and is an indispensable part of my exploration toolkit.“
In addition to revealing very subtle structural details of the geology, this mapping will form an essential part of modelling historic production and the remaining gold resource at the project going forward. This revolutionary hand held LIDAR scanning technology allows us to complete extremely accurate underground geological and sampling maps, volume analysis of material moved, and careful planning of exploration drilling to better calculate mineral resources in preparation for possible resource definition and mining at Pamlico.
Carrington Consulting’s team is scanning more than 5 miles of tunnels at Pamlico for Newrange. These workings extend over an area more than 1,500 feet long and 800 feet wide with a vertical depth of roughly 300 feet and form an extensive network of adits, tunnels, stopes and raises with at least 30 major entrances that are largely interconnected. Scanning is tied to established surface survey control for registration and orientation so the scan can be accurately carried underground. Underground survey control points are established using a series of spheres to allow Newrange’s geologists to later reoccupy the points to complete the geological mapping.
Many of the mine workings are less than a metre wide and in some cases, they are also less than a metre high following the gold vein, wherever it goes, forming a very irregular, complex network of tunnels and stopes. It would be prohibitively slow and expensive to do this essential mapping with conventional surveying or terrestrial scanning, but the ZEB Horizon makes it realistic for Newrange to accomplish this ambitious goal.
As always safety is paramount, especially when entering old mine tunnels and stopes. With the 100 meter distance capability of the Horizon no one needs to go into unsafe areas. In addition virtually every timber, ladder, and detail are recorded.
We have produced highly accurate data of mine workings up to ¼ mile in length in less than 15 minutes, which changes the game for Newrange at Pamlico. As Newrange gathers information on gold grades from sampling throughout these workings, we are integrating additional layers of information to build a comprehensive 3D model of the geology across the entire area of old underground workings.
Midland Surveyuses GeoSLAM to scan nearly 200 rooms at Oxford University
30 mins per scan
Words by David Johnson | Midland Survey
“Midland Survey are experts in surveying complex and difficult to access spaces where there is limited or no GPS, but Oriel College with its labyrinthine network of historic buildings brought a particular set of challenges.
Oriel College, part of the prestigious University of Oxford in the UK, is nearly 700 years old, with around 200 rooms across five stories including an “island site”, accessible only via tunnel. The structure has been extended over the years and no accurate floor plans or elevation drawings exist.
As a world-class institute, it is occupied 24/7 and opportunities to accurately scan with minimal disruption are few. Traditional tools were not an option due to the network of rooms spread across 5 stories.
Due to the lack of GPS coverage in the tunnel, the only option was to use GeoSLAM’s ‘go-anywhere’ ZEB Revo. The unusual shape of the building, with its unconventional layout and complex network of rooms, meant it was too difficult and time-consuming to survey with traditional static scanning methods (as this would require multiple individual set-ups and increased post-processing work). We needed a lightweight, mobile tool that works well in enclosed environments.
“The entire project was completed in around half of the total time that would have been required using static equipment. The ZEB Revo is a real game-changer for us.“
Using the ZEB Revo around 200 rooms were scanned, amounting to 12,000m². Across 5 days, 12 individual rapid ZEB Revo scans were completed each taking just 30 minutes. The entire project was completed in around half of the total time that would have been required using static equipment.
We frequently work in hazardous environments, as well as in complex and difficult to access spaces where there is limited or no GPS coverage such as heritage buildings with thick stone walls. We often have limited time on site to accurately create a 3D model. Access to user-friendly technology such as the ZEB Revo that scans multi-level environments and produces accurate and high-quality 3D survey data, is a real game-changer for us.
Minnesota Manholes– Scanning Safely and Quickly in Confined, Hazardous Spaces
Sewer pipe network
Public works and energy utilities are continually looking for new ways to protect the safety of their personnel in the field. With the help of the GeoSLAM ZEB Revo mobile laser scanner and the specially designed GeoSLAM Cradle, the cramped and hazardous spaces in manholes can now be captured in 3D without putting field workers at risk.
“An engineering survey firm scanned the interiors of 4,500 manholes with the ZEB Revo for a Minnesota municipality,”
What lies beneath the manhole covers found in nearly every city and town varies considerably. Some are access points to extensive storm water and sewer pipe networks. Others are entries into utility conduits through which water mains and electric lines are run. A few manholes are simply tight underground spaces where key pieces of municipal infrastructure reside.
Regardless of their function, manholes and the assets they contain are difficult and sometimes hazardous to map. Not only are the interior spaces dark, dirty, confined and usually wet, they pose potential risks related to cave-ins, poor ventilation and rodent infestations. Above ground, the manhole access points are often in the middle of busy streets requiring set-up of a cone zone to try and protect workers from passing traffic.
“You capture the data you need for one job and then have information someone else might need for another without a second site visit.“
This combination of hazards compels workers to spend as little time inside the manhole as possible. As a result, they have traditionally captured only the measurements they need for the project at hand – usually with a surveying level rod.
You capture the data you need for one job and then have information someone else might need for another without a second site visit. One of the most common applications is measuring the elevations of pipe inverts to map a water supply or drainage network in preparation for system expansion or maintenance. Personal hazards aside, making accurate asset measurements in a tight underground space with a long level rod can be challenging.
The ZEB Revo is increasingly being turned to for these jobs because the handheld laser scanner is fast, accurate, and captures comprehensive point clouds. Most importantly, it keeps personnel out of harm’s way. Favoured for manhole environments because of its high IP rating, which means it can be used in dirty and wet conditions, the ZEB Revo can be lowered into the underground space with the GeoSLAM Cradle.
In just a few minutes, the lightweight device can capture 360-degree scans inside the space regardless of available lighting. Even if the assets being surveyed are offset from the opening or several meters down tunnels, the ZEB Revo captures the 3D scan data needed to generate an accurate point cloud of the subsurface space.
“The first benefit of laser scanning [in manholes] is safety. The second is you collect a very comprehensive and complete data set. You capture the data you need for one job and then have information someone else [in the organization] might need for another…without a second site visit.
The Importance of Accurate Measurements in Construction
In Denmark, inaccurate data of floor space in residential or office buildings can have legal implications. Therefore, building contractors must provide accurate measurements for the built floor area for each apartment before a purchase could be finalised.
LIFA Surveyors is one of the leading surveying companies in Denmark. They were recently tasked with collecting floorplan data for a 13-story waterfront apartment building in Vejle. The apartment building, totalling 58,000 sq. ft, was going through construction, and each apartment required accurate measurements of the floor space.
Consequently, LIFA Surveyors needed a solution that could precisely map each apartment at speed and with minimal disruption.
How GeoSLAM Technology is Beneficial for Surveyors
They decided to work with handheld SLAM laser scanners and found that GeoSLAM’s ZEB Revo was the best solution for the job.
The ZEB Revo appealed to LIFA for various reasons but above all the scanner is easy to use, requiring minimal training. As a result, the entire building could be scanned by one person in 30 minutes. Further, the ZEB Revo’s speed of capture combined with its accurate measurements, meant that LIFA could achieve its goals cost-effectively.
We surveyed an entire 13-storey residential building in one and a half hours with only 30 minutes needed for the actual scanning.
Using accurate measurements and point clouds to Create BIM Models
The 3D point cloud data collected by the ZEB Revo was used to create a Building Information Model (BIM). Technicians used the BIM to take measurements of the apartments and common spaces, such as hallways and elevator shafts. During this process, the team visually compared the model against the original design plan to ensure that all building elements were constructed correctly. Due to the efficiency of the scanner, LIFA achieved the accuracy needed for their client.
The speed of capture and ease of use resulted in LIFA surveyors dramatically reducing their time on interior building survey from days to hours, whilst maintaining high levels of accuracy.
Within days of the scan, LIFA delivered the final measurements to the contractor – a cost-effective solution for both companies.
Iowa Department of Transport uses SLAM to create 3D models of salt stockpiles
10 mins per scan
Words by Tina Greensfield | Iowa DOT
At Iowa State DOT (Department of Transport) it is our job to make sure over 24,000 miles of road remains clear and safe to use in winter. We have 109 maintenance areas across the state where stockpiles of salt are kept for distribution. Each facility can each hold up to 1200 tonnes.
Throughout winter salt is loaded onto trucks and spread on roads to stop the surface from freezing. Pay loads are measured in weight as salt is loaded onto spreading trucks and supplies are depleted. But as the salt is used, there is a clear discrepancy between the volume of salt in the shed and the paper records – it is not reliable to just look inside a half-empty shed and assess how much material remains.
If volume of salt is too low or we don’t know how much is available, we may find ourselves forced to make snap decisions about redistribution which is both costly to the state and inconvenient to residents and businesses alike.
We needed another solution and following a few severe winters where salt reserves around the country ran out, the Great Lakes froze and shipments were halted we were determined to invest in a reliable measuring process for managing stockpiles in future, which led us to a GeoSLAM volumes solution.
“In terms of speed and accuracy, this was a real game changer for us!“
Using the handheld SLAM device, we can produce a three-dimensional model of the stockpile in just a few minutes. We have never experienced this level of accuracy before and capturing data was as easy as surveying the site with the naked eye.
The surface of the stockpile is very uneven with lumps on one side and big cliffs on the other where loaders have dug-out salt for spreading, in the past our ‘best guess’ used to involve looking at the stockpile against some markers on the walls of the shed which provided limited accuracy to say the least, so this was a real game changer for us.
Data is then processed using GeoSLAM Hub and imported to the volumes software. As the granules vary in size, we apply a bulk density value as well as defining a floor and perimeter of each pile calculate the total volume of the stockpile in tonnes.
From start to end, the entire process took around twenty minutes. We now have depot staff going out and scanning the stockpiles regularly. This new level of insight means we don’t have to worry about compromising road users’ safety across the state of Iowa as we always know what volume of salt we have available to use.
Glencore uses GeoSLAM to assess risk in underground base metal mine
15 mins per scan
Base metal mine
Kidd Mine, Glencore | Natural resource company
When creating underground mapping for mines, mining engineers are often faced with having to work in hazardous and rugged environments, in difficult-to-access spaces and without GPS coverage. In order to address these challenges, mining companies are continuously searching for ways to plan efficient site operations, streamline tunnelling processes and optimise production and personnel safety.
Kidd Mine, an underground base metal mine in Canada and the world’s deepest copper/ zinc mine, epitomises this by adopting new and advanced survey technology. With the aid of GeoSLAM’s 3D mapping technology, the mine is able to assess risk associated with ground and support systems failure, magnitude seismic events, large-scale deformation or rock bursts associated with mining at extreme depths.
Built for harsh and demanding environments, GeoSLAM’s handheld laser scanners are robust, splash-proof and dust-tight (with ratings up to IP64 level). They’re adaptable to any environment – inside or outside, in daylight and darkness – without the need for GPS.
Lightweight and easy-to-use, you can walk and survey accessible areas quickly and easily – even those which are normally off-limits. For more confined or unreachable places, they can be attached to trolleys or mine vehicles for remote monitoring.
“It’s critical data that will help us lower the risk to personnel and keep mines safer“
David Counter, a senior ground control engineer at the Kidd Mine, emphasised the importance of using a hand-held laser scanning device to map the underground areas at the mine. “It produces a continuous 3D animation image of whatever underground areas are being scanned as the user walks along the drift. This allows the mine to map out problem areas and to carry out ground support rehabilitation in those areas.”
“The ZEB Revo provides a background dataset that can be used for comparative purposes if a future high-magnitude seismic event occurs or for determining how much static deformation has been occurring due to regional mine closure over time.”
Despite needing to rapidly map mines under intense time constraints, traditional underground survey techniques have proved to be slow. Mine engineers and surveyors all need access to user friendly technology that is easy to install and use, but is robust and reliable enough to do the job quickly and accurately. Within minutes anyone can be using a GeoSLAM scanner and immediately start creating a 3D point cloud of the area. Data is collected continuously while walking the survey area – with no time-consuming or cumbersome set-up required.
GeoSLAM’s award-winning software instantly turns data into actionable 3D information. So, you can rapidly gain insight into rock mass behaviour and map out deformations in rock walls & complex tunnel profiles. Plus, accelerated survey workflows help you deliver productivity and efficiency improvements, at the same time as helping you hit your zero-harm targets.
“There is a sound basis for SLAM laser technology to define areas where the ground support systems need to be replaced or rehabilitated,” Counter concluded.
Laser scanning in the busy environment of Arc de Triomphe
Arc de Triomphe
Geotopo | Words by Samuel Duhaussay
Alongside our work in land management, engineering and rail sectors, our teams dedicate time for architecture and heritage projects, working to preserve just some of the 40,000 listed historic monuments in France alone. As a geospatial technology specialist, we are aware of the great significance many of our historical monuments hold.
One of the most famous, located at the tip of the Champs-Elysees in central Paris, is the Arc de Triomphe. In order to demonstrate to the Parisian crowds the precision and speed of scanning technology, we enlisted the help of GeoSLAM’s ZEB Horizon.
Recognised as the centre of Paris for its position on the iconic roundabout, and measuring 50m tall, 45m wide and 22m deep, access to the Arc is limited. Yet with the ZEB Horizon and its ability to capture distant elements at a range of 100 metres, the handheld scanner proved to be an effective companion for the project.
“The ZEB Horizon was not only fast, but discreet and easy to operate in such a busy environment“
With approximately 600,000 visitors per year, accessing the site with a static scanner would be difficult. In order to carry out the survey, the operator walked around the Arc, returning to complete a figure of eight shape, all in one fluid motion and after ten minutes data capture was complete.
Achieving the same results with a static scanner would have taken considerably longer due to the numerous set-ups and the time it takes to complete each scan. The ZEB Horizon was not only fast, but discreet and easy to operate in such a busy environment.
GeoSLAM technology was at the top of our list to scan the Arc, primarily due to its accuracy, ‘on-the-go’ method of data collection and fast application. In just 10 minutes of data capture, we obtained 10 million cloud points with 2cm accuracy – together depicting the engravings of war victories as designed by architect, Guillaume Abel Blouet in 1833.
Its ability to capture 300,000 points per second made the ZEB Horizon our technology of choice. Understanding the project’s restrictions due to location and popularity, we’re delighted with the outcome, which demonstrates the importance of mobile mapping devices to historical buildings such as this.
ZEB Horizon used to Capture data on Croatia’s forest to understand biomass
1km in length
Geocentar | Words by Luka Zalovic
“47% of Croatia’s total land area is covered by forest, an area of approximately 25,000km2 . Management of these vast valuable assets is a key industry in Croatia and across its central European neighbours. As well as managing the biodiversity and sustainability of the forests, it is important for commercial logging companies to assess the quality and biomass of the forests for responsible timber sales. This assessment is a growing need – every year, Croatia adds 10.5 million m3 of forestry to its stock.
Methods of forestry management typically involve measuring the height, diameter and relative position of trees using equipment such as tape measures, ultrasound instruments, total stations and terrestrial laser scanners. However, there are limitations to these methods – they’re often time consuming, involve multiple setups and numerous members of staff to take the measurements (especially since forestry is usually in remote and difficult to access areas). Due to dense canopy cover, forests are usually GNSS-denied areas, and along with the uneven terrain, it can be difficult and time consuming to measure with terrestrial laser scanners.
Geocentar have a large client base in the forestry industry and upon delivery of our new ZEB Horizon mobile laser scanner, we decided to put the technology through its paces and see how it weighs up against other solutions for measuring biomass.
“The ZEB Horizon captures forestry data more accurately than traditional methods and eight times faster“
Visiting the Perivoj Zrinskih park, the ZEB Horizon was initialised on a flat surface before the operator navigated around the park at normal walking pace. With a capture range of 100m, It took just 9 minutes in total to walk around the park and capture all the trees.
Back in the office we processed the data with GeoSLAM Hub software, then exported using GeoSLAM Draw. The data was then imported into an open source forestry programme called 3DForest whereupon several parameters could be measured and extracted automatically including ground extraction, tree detection, tree position detection, tree radius determination, tree height determination, tree crowns detection, crowns volume calculation and crowns collision determination.
Later we revisited the park to check the accuracy of their results and re-produced the survey using a total station with built-in REM (Remote Elevation Measurement) and a measuring tape. Not only did it take four minutes per tree to capture data due to all the total station setups, but only four parameters (diameter, height and relative position) could be calculated using these methods. If they had attempted to measure all 217 trees, it would have taken a whopping 14.5 hours!
Using the ZEB Horizon and 3DForest software, it took 9 minutes to scan the park, 12 to process the data in GeoSLAM Hub, 5 minutes to reduce the data size in Hub and prepare the cloud for the forestry software, which took 90 minutes to process. The total workflow took just under two hours to collect and measure all 217 trees – using traditional methods they could have surveyed just 29 trees in this time.
Geocentar calculated that results were accurate to within 3cm and were more accurate than using traditional methods, leading to great cost savings.
As mobile laser scanning becomes faster, more cost effective and accurate, surveying companies are finding them to be one of the most efficient tools for capturing the spatial details of a building in 3D. Pointclouds are being used more and more in the property renovation and architecture markets, where the use of LiDAR and SLAM are driving down cost and increasing efficiency.
CEP David Pierrot is a surveying company based in the South-East of France, in both Cannes and Mandelieu. Since beginning their business in 1965, his company has worked on over 21,000 projects in the Alpes-Maritime and surrounding areas, and they continue to work on over 800 projects per year.
The company is represented by 2 expert surveyors, David Pierrot and Robin Bruna. They understand the value in using the latest hardware and software technologies to achieve the best results for their clients. In recent years David and Robin have adopted GeoSLAM scanners into their arsenal of tools, due to their speed and precision. They began working with the ZEB Revo RT, and have since incorporated two ZEB Horizons into their business.
Pointcloud captured by CEP David Pierrot using GeoSLAM scanners
ZEB Horizon | Scanning a French villa
The company was recently tasked with completing a survey of a villa on a steep hillside, in Théoule-Sur-Mer. The goal of the project was to create a detailed topographical map of the existing building and surrounding area, working closely with an architect who will use the map to plan and conduct new construction work. As the surveying experts, they establish whether the site is suitable for the planned construction work, and the architect uses the 3D/2D vector to put together plans for the construction work.
The GeoSLAM ZEB Horizon was chosen to conduct this scan because of its speed of acquisition, precise measurements, range, and versatility. A large part of the scan took place on a steep hill leading up to the house, so a handheld scanner was the ideal choice.
The surveyor in charge of this scan, Robin Bruna, was able to walk and scan, cutting down the time it took to capture the entire area, whereas a static scanner on a tripod would have taken far longer due to the tough terrain. The entire scan was conducted using only the GeoSLAM ZEB Horizon.
The ZEB Horizon scans points at 40-50m, which allows for a much better trajectory than other mobile scanners.
The area of land scanned, including the house, totalled 8000 sq/m and the whole area was captured in just 4 scans. Each scan took approximately 10-15 minutes to complete, so the team were able to capture useable pointcloud data in approximately one hour!
The separate scans were then processed using GeoSLAMs HUB software and merged into a complete 3D pointcloud before being georeferenced. The team then took the pointcloud through a classification process to get a better understanding of the land, before beginning the creation a 3D/2D vector map in Autocad.
They also created longitudinal cuts in the cloud to provide the architect with reliable and visual information about the incline of the hill. The maps created will help the architects carry out landscape insertions and plan out new construction work to the lower part of the property.
The use of the ZEB Horizon meant that the team could not only carry out the entire scan with ease, but due to the speed of data acquisition, they were able to get the pointcloud into the post processing stage far quicker than if they had used a static scanner, thus saving them time and money.
The digitlisation of the land makes it possible for the architect to check the feasibility of construction, without needing to re-visit the area. Finally, in line with the “ordre das geomitics-experts”, David and Robin set up a process that allows the inspection of the measurement accuracy.
To learn more about some of the projects CEP David Pierrot have been involved with, visit them at www.cabinetpierrot.fr
Creating floorplans to cut incident response times
Response time reduced by 21%
Schools across the USA
Entropy Group | Words Robert W. Myers J.D.
Active shooter incidents are a growing concern in the United States, with death tolls, most predominantly in schools, rapidly rising and law enforcement resources stretched beyond breaking point.
With the unpredictability of these incidents, both in scale and location, our team at Entropy Group LLC has been working alongside law enforcement and US attorneys nationwide in order to compress response times, by utilizing 2D floor plans and 3D models developed from GeoSLAM ZEB Revo RT data sets, a program that is patent pending.
“ZEB Revo RT provides us with the necessary accuracy and is much more time efficient than other laser scanning technologies.“
The significance of the problem is evidenced by the recent publication of a National Standard for response to active shooters. The National Fire Protection Association, (NFPA), published NFPA 3000(PS), a provisional national standard, titled, “Standard for an Active Shooter / Hostile Event Response (ASHER) Program“, published April 11, 2018.
According to scanning professionals, to map just the K-12 public schools in the U.S., it would take a scanning team, scanning 100,000 square feet per day, seven days a week, a total of 181 years to complete. This estimate addresses only the public schools and does not address any of the many private schools, let alone the post-secondary school facilities.
When confronted with the magnitude of the effort it was immediately obvious to Entropy Group LLC staff that we needed to join forces with GeoSLAM because their ZEB REVO line of scanners provide the necessary accuracy and are much more time efficient than other laser scanner technologies.
To finalize the proof of efficacy of the patent pending filing, Entropy Group LLC recently completed a simulated active shooter incident where six law enforcement officers were tested by responding to a fictitious scenario. Officers were provided a detailed floorplan of the two story building which is currently used as a church and parochial school facility. The structure is quite complex with many classrooms, counselling rooms, worship sanctuary, multi-media studios, café area and church offices.
The results of the exercise indicate that officers which have access to the 2D floor plans ahead of time, improve their situational awareness, their confidence in responding to a facility that they have never been to previously, by gaining “facility familiarity” through review of floor plans and other data prior to their response. Additionally, response times were documented to decrease by up to 21%. This improvement in response will directly result in fewer deaths and casualties.
Entropy Group LLC is a full-service Forensics and Security Consultancy firm providing services for Executive Protection, Accident Reconstruction, Security Threat Assessments, Building Information Modelling, Security Design Reviews, Security Program Reviews / Audits,Litigation Support, Pre-Travel Security Front Team Assessments, and Access Control Assessments.
We value our relationship with GeoSLAM and California Surveying and Drafting Supply (CSDS) and their support of our mission by providing premier instrumentation for the improvement of societal ability to address and respond to active shooter events.”
1 Springer. “Rapid rise in mass school shootings in the United States, study shows: Researchers call for action to address worrying increase in number of mass school shootings in past two decades.” ScienceDaily, 19 April 2018
Using LiDAR to understand complex forest environments
10 mins per scan
1km in length
University of Leicester | Eden Project
Monitoring and understanding our environment has never been more important as the threat of climate change looms and governments step up to better manage their greenhouse gas emissions. Tom Potter, a doctoral researcher at the University of Leicester, UK, set out to further develop a technique to estimate biomass and carbon more efficiently using state-of-the-art, mobile LiDAR sensors across multiple, complex forest environments.
To do so he visited the Eden Project in Cornwall, UK which reflects a true tropical forest – representing different forests from around the world with a rainforest ‘biome’ of over 1,000 tropical trees and plans. However, he had to work around several challenges. For fixed point scanners, the high-density plots of specimens created a problem of shadows – known as ‘occlusions’ – whereby the nearest features will block out features behind. This also limits the ability to acquire accurate measurements to create a comprehensive 3D model. And with the biome being open to the public and a popular tourist destination, Tom only had a few hours each day before opening hours – insufficient time for a traditional static survey.
“Using GeoSLAM’s local processing software, the raw scan data was processed on site, with no internet connection required – useful when in an actual rainforest!“
Mobile surveying equipment that was able to take readings easily and quickly from even the densest areas was needed to ensure precise scans were taken to accurately calculate biomass and carbon storage potential.
Tom found the mobility and speed of GeoSLAM’s ZEB Revo to be the perfect solution. The lightweight scanner can be pole mounted, handheld or even attached to a vehicle or drone – collecting over 43,000 measurement points per second. Instead of hundreds of time-consuming static scans, Tom captured all angles by simply walking in a loop around the rainforest environment.
He then converted the point cloud data into 3D volume-based plots to derive above-ground biomass and carbon densities for multiple types of tropical forest. A comprehensive dataset was built, containing information for any type of forest that scientists can use to make calculations with minimal survey effort or expertise. And all at considerably less expenditure than traditional survey methods.
COWI embraces mobile mapping technology to measure buildings
COWI | Words by Morten Thoft
Digital technology is changing the way we design, construct and maintain our infrastructure. With the built environment ever more complex, traditional 2D data is not up to the task. As we move towards a more intelligent, more integrated, BIM-focused methodology, 3D data is becoming the norm. To stay ahead of the competition, surveying firms need to integrate innovative engineering approaches, digital technologies and intelligent data.
COWI is a multi-discipline engineering and planning firm based in Denmark. We have been eager to accelerate survey workflows and, as a result, have embraced digital engineering and added several GeoSLAM solutions to our arsenal of specialist scanning equipment. In just 6 short months since acquiring their first handheld laser scanner, a two-man team at COWI has used the ’go-anywhere’ mapping device to survey the interiors of some 400 municipal buildings; mapping over 16,000 rooms and measuring more than 300,000 m2 .
“We can now measure building plans 10-times faster than we used to with total station or traditional survey equipment.“
GeoSLAM’s solutions are changing the way we survey buildings. We can now measure building plans 10-times faster than we used to with Total Station or traditional survey equipment. Our decision to purchase another GeoSLAM solution was easy. With their handheld devices, we surveyed more buildings with more rooms in six months than traditional survey equipment would have allowed in many years. And we were able to capture more information in the process.