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Mapping a decommissioned power station


Cape Town, South Africa

Scan time

8 Hours Total


Approx. 117,000 m2


Power Station



ZEB Family | Safely surveying a hazardous power station

All over the globe, countries are looking to nuclear and hydro renewables, not only to provide their electricity needs but to meet climate goals. This is resulting in the shutting down of coal-fossil power plants that no longer have a role to play in a fast-changing world.

Opened in 1962, the Athlone Power Station was the last coal-fired power station operating in Cape Town, South Africa when it stopped generating power in 2003. The iconic cooling towers, which were known by locals as “The two ladies of Athlone” and had long been a feature of the Cape Town landscape, were demolished several years later.

The efficient user-friendly GeoSLAM equipment enabled the team to safely and comprehensively survey this hazardous and complex plant.

Proper planning was essential as demolition can be potentially hazardous for the safety of personnel due to the plant’s age-structure, and onsite teams often having to operate across split levels, in total darkness. The removal of contaminated waste can be equally challenging. Cost is also a major factor and companies responsible for shutting down plant are continuously looking at ways to be cost effective while providing a reliable, fast and efficient service.

Aurecon, a global engineering, design and advisory company, won the tender from the City of Cape Town to project manage the site for the final stage of decommission. This involved surveying the plant whilst stripping, clearing and removing unused material, redundant equipment and certain historical structures. Their task also included securing all remaining structures, leaving the site in a secure state and registering servitudes for remaining bulk services. Aurecon found Athlone to be a challenging project due to accessibility issues and lack of light. Also, because of the Power Station’s historical importance, salvaging certain unique equipment had to be considered. The team needed a simple and effective solution that could accurately map the site quickly while keeping them safe in a tough environment.

Aurecon chose to work with mobile LiDAR scanners so that the historians, structural engineers and environmentalists could have the data they needed, without having to enter the potentially dangerous site. For the Athlone project, GeoSLAM’s ZEB Revo RT scanner and ZEB Pano camera were used, as well as the ZEB Horizon and ZEB Cam. The building’s interior and exterior were scanned with the ZEB scanners The two data sets were merged to provide a full 3D point cloud of the entire building.

Using the Pano, the team generated photos that were incorporated inside the point cloud, so that the offsite survey team could have greater visualisation of the site to feedback commentary. The efficiency of the scanners and speed of capture meant that unlike other scanning methods, the team could repeatedly capture the site. This meant that decisions and assessments could be taken frequently, without the need for lots of people to visit the dangerous site.

In total, the whole facility was scanned in three days with data sets processed overnight, a total of eight hours. The combined datasets were available within a week, which enabled Aurecon’s modellers to commence work on the classification of components in the power station.

The final 3D point cloud representation of the interior of the power station enabled the engineering team to assess and quantify the amount of salvage and scrapped material to be removed from the site, and to plan the logistics of the removal in context with the physical shape and size of the existing building.

The accurate 3D model equipped the stakeholders with information that allowed them to safely and precisely analyse for activities such as material quantification, condition assessment and the preparation of decommissioning method statements.

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    3D Scanning Construction and Demolition Waste



    Scan time

    17 minutes per scan


    82,823 m2


    Construction and demolition waste



    The government of Egypt (GoE) are leading several initiatives to reuse and recycle the ever-increasing quantities of construction and demolition Waste (CDW) around the country. These initiatives include a national strategy and action plan to effectively manage around 40 million tons of CDW generated annually. They target to recycle 50% of CDW materials by 2030. One of the major challenges facing Municipalities in Egypt is calculating the amount of CDW accumulated, due to illegal dumping of waste being common place in cities.

    Commissioned by the Ministry of Environment and the GIZ institution, HBRC (Housing and Building National Research Centre) have been tasked with finding effective methods for quantifying and characterising the amount of CDW in four Egyptian Governorates (Gharbia, Kafr-El-Sheikh, Assuit and Qena).

    This project paves the way to developing an optimal construction and demolition waste management strategy in Egypt. The research team used GeoSLAM’s ZEB Revo RT SLAM laser scanner to map the construction waste piles. The scan data is a sound method for quantifying waste volumes over a period of time, due to the ease of capture and accurate data.

    The traditional surveying of CDW accumulations was not practical as CDW locations are difficult to walk through and experience rapid changes to the waste quantities.

    The ZEB Revo RT is ideal for rapid data capture in real time, making it the perfect tool for this job. By walking through the construction and demolition waste sites, the team are mapping as they go, shortening the amount of time spent in a hazardous environment, reducing health and safety risks.

    The simplicity of the solution means that anybody can capture the data, with minimal training, making the scans repeatable as often as needed. Covering an area of 84,823 m2, the research team conducted 12 scans, dividing the route into zones and each scan lasted an average of 17 minutes.

    Once the scanning was complete, they opened the data in GeoSLAM Hub where the point cloud can be viewed and prepared for GeoSLAM Volumes. Using GeoSLAM Volumes, the researchers could accurately calculate the quantity of construction and demolition waste. The findings were reported back in a presentation during the third International conference on Smart Cities.

    This way of calculating volumes is fast, efficient, cost effective, safer than other methods and repeatable, making the SLAM scanner the right tool for the job. The research effort opens the door into the utilisation of 3D modelling of construction waste management sites.

    The application of laser technology would enable the quick and accurate estimation and modeling of waste quantities.

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      Scanning in America’s oldest show cave



      Scan time

      12 minutes


      500 meters


      Grand Caverns



      Discovered in 1804 by Bernard Weyer in the heart of Virginia, Grand Caverns (formerly Weyer’s Cave) is the oldest show cave in the USA. During the US civil war, the cave was used by both Confederate and Union soldiers as part of the Valley campaign, during which time over 230 soldiers signed their names on to the cave walls. More recently, the cave has become a huge tourist attraction, due to its beauty, location and being surrounded by scenic trails for hiking, running, and biking, but it has also captured the attention of the scientific community because of recent discoveries of new passages and the rock formation changes over time.

      The town of Grottoes (where the show cave is located) partnered with Angel A. Garcia Jr. and his students from James Madison University to create a 3D map of the cave. The 3D point cloud is being used to measure Speleothems, monitor the human impact on the cave, create 3D printed models and to celebrate the show cave’s extensive history, shining a light on its geoheritage. In addition, it is a fantastic opportunity for the undergraduate students of JMU to get hands on experience with the handheld LiDAR scanner and the data it outputs.

      Angel A. Garcia Jr. chose GeoSLAM’s ZEB Horizon scanner to take on the task of mapping both the parts of the cave open to the public and the recently discovered, vast passages. He and his students capitalise on the speed of capture and accuracy of the scanner to review and analyse data in a quick and efficient manner.

      With the LiDAR we’ll be able to get into corners and see what hasn’t been looked at for a long time.

      Having originally purchased the ZEB Horizon back in February 2021 to collaborate and share data with partners scanning caves using ZEB devices in Puerto Rico, Professor Garcia began to see the potential and opportunities the scanner offered. Fast, accurate and handheld data capture opens a way to map an area without the need to GPS or complicated setups. In addition, the scanners ease of use means that undergraduate students can be involved in the project with limited to no training.

      Since beginning to use the ZEB Horizon, interest in Professor Garcia’s work with the SLAM scanner has escalated, and he has subsequently been invited to other universities to run workshops. In April 2021, he was approached by Grand Caverns to map the historic show cave.

      The public area of the cave is approximately 500 meters in length, 30 meters high and has stairways in places, so it is quite a large area to capture. Professor Garcia and his students were able to capture the entire public area in approximately 12-15 minutes, by simply walking and scanning. He pointed out that a terrestrial laser scanner would be able to capture the public part of the cave, but it would take days, not minutes, and due to the uneven surfaces of the non-public area of the cave, it would be impossible to get a tripod-based system down there. Alternatively, you could measure a cave using a distometer, but this could take months, if not years to complete.

      The ZEB Horizon was able to give them a quick accurate scan in 12 minutes, so the students could get to work reviewing the data for their various projects.

      It’s going be able to detect the stalagmites, the stalactites and it’s even going to be able to detect the cave shield because it’s that precise.

      The data is being processed using GeoSLAM Hub, and Draw is being utilised by the team to accurately measure the speleothems over time. The students can see the orientation, thickness and gather measurements using the LiDAR information alone. They are also hoping to use Draw to understand accurate dimensions of the cave. Furthermore, the 3D point cloud is being used as a base to 3D print the cave within a rectangular block, for further research purposes.

      The team continued to scan the cave over the summer, and Professor Garcia is working with the caving/spelunking community of experts to begin capturing the more problematic and recently discovered new passages of the cave. These areas have not designed for the public at the moment, so there are uneven surfaces and narrow corridors, but due to the ZEB Horizons mobility, capturing previously unseen parts of cave will be quick and safe.

      Professor Garcia concludes by saying that the 3D model will provide an opportunity for those who can’t physically enter the caverns, to learn what they are all about.

      If you’d like to learn more about how GeoSLAM solutions can help you, submit the form below.

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        Scanning a Caribbean hospital with the ZEB Horizon to create a BIM model




        St. Elisabeth


        Square Meters

        Scan time
        Scan time

        20 minutes
        per scan



        Constructed in 1855, with the help of the Franciscan sisters, the St. Elisabeth hospital has played an important role in the Otrobanda City district on the Caribbean island of Curaçao, for over 160 years. The large hospital served as the main hub for medical care, and was historically used as a place of healing for other island nations nearby.

        Having been deemed no longer fit for purpose according to international standards in 2011, it was decided that a new hospital would be constructed next to St Elisabeth’s, and in 2019 the Curaçao medical center was opened to the public. St. Elisabeth hospital was closed in November 2019, after 164 years of service to the island.

        In 2021, Ellen de Brabander, from Urban Studio, was appointed by the survey bureau ‘Landmark’ with the task of scanning the hospital, in anticipation of renovation projects. Ellen chose the ZEB Horizon for the task, and later created an accurate BIM model using the point cloud data. In addition, Ellen is working on creating a virtual tour of the hospital, so it can be entered and explored from anywhere in the world.

        Due to the large complex nature of the building, with several floors and many individual rooms, the task of capturing and measuring the hospital was an enormous one, in terms of time frame. Originally Ellen was going to scan the building using a total station, however because the hospital is broken into 6 sub-buildings, an average of 3 floors per sub-building and many individual rooms per floor, the total station was quickly ruled out. Furthermore, with difficult to access areas, the bulky nature of a tripod-based system would not be ideal for capturing the hospital in its entirety, or fast enough.

        After assessing the options, the team decided the best way to capture the building would be to use a mobile 3D scanner, due to the lightweight nature, speed of capture and ease of use. Ellen chose a ZEB Horizon for the job and was able to seamlessly walk through the hospital’s complex buildings, capturing data as she moved.

        The 3D scanner of GeoSLAM was able to reduce the time of the measurement and as a result the delivery time was met. The measurement time would normally take several months, which was reduced to days

        Having decided on the ZEB Horizon, she was able to capture both the interior and exterior of St Elisabeth’s hospital in just 6 full working days, which was an extremely short amount of time compared to traditional measuring equipment. 52 scans were conducted in total, at approximately 20 minutes per scan and the area covered (including exterior and interior) was 22,346 square meters. The complex nature of some of the spaces were captured effortlessly because of the manoeuvrability and compactness of the scanner.

        The scans were processed and merged using GeoSLAM Hub before they were converted in Autodesk Recap and taken into Autodesk Revit to be modelled. The model of the hospital was sent to the client and the process from capture to model was documented in a video, which can be seen here:

        3D BIM model of Caribbean hospital

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          Creating a digital twin of Cistercian Landscapes



          Scan time

          3.5 hours


          Franconia, Germany


          3 hectares


          Cistercian Landscapes

          With the adoption of digital technologies such as laser scanning, photogrammetry and other digital tools becoming ever more prevalent in conservation and preservation; it is easy to see why, in 2017, the University of Bamberg launched a new master’s degree, ‘Digital Technologies in
          Heritage Conservation’. Spearheaded by Professor Mona Hess, the course covers the integration and adoption of digital technologies in heritage conservation and its further development, as well as raising the profile of this research topic. In addition to running the course, Professor Hess and her team often employ their skills and expertise in the field, creating 3D digital models for preservation purposes, to build knowledge of certain areas or to educate a wider audience about a new culture.

          The 3D recording is a methodological tool for the representation and interpretation of cultural heritage, landscape and architecture, to build knowledge, create meaning and make culture accessible to all.

          The Scan
          In 2020, Professor Hess was approached by ‘Cisterscapes | Cistercian Landcapes in Central Europe’ and was tasked with contributing to the digital recordings of 2 gardens. The scan would focus on the baroque agricultural buildings with designed gardens; Ebracher Hof in Mainstockheim and Ebracher Hof in Oberschwappach, both properties of the Ebrach Monastery.

          The aim of the scan was to create reliable information, assess the landscapes development status and design management plans for maintenance and conservation. Professor Hess, accompanied by PHD student Carla Ferreyra, visited the sites in October 2020 to conduct the scans. With approximately 3 hectares of land to cover, the team needed a SLAM scanning solution that was quick, easy to use, suitable for both indoor/outdoor use and a solution with reliable results. Professor Hess chose GeoSLAMs ZEB Horizon with the ZEB Pano, because of the rapid data acquisition throughout the site up to 100m.

          Other laser scanning techniques were considered in the planning process, however none quite provided the freedom the ZEB Horizon did, often
          with restrictions around mobility and time. In September 2020, a similar scan had taken place using a terrestrial laser scanner (TLS) of a specific
          area of the Mainstockheim garden. In comparison, the GeoSLAM scanner reduced the time and labour costs when completing the scan. The team were able to complete their scan of Mainstockheim (including an interior space of the baroque building) in just under 3 hours.

          In Oberschwappach, the total scan time was approximately 30 minutes. Their only concern during the scan was encountering the general public, however due to the lightweight nature of the ZEB Horizon and Pano, it was easy to avoid busier parts of the garden. Where they did encounter other guests (due to their curiosity over the scanner) Professor Hess and Carla simply repeated the scan of that specific area. All in all, the scan was a success, and Professor Hess and Carla were able to deliver on their task.

          The Results
          With the completion of the scan, not only does Professor Hess have fresh scan data that can be used to educate the next generation on how
          digital technologies can be used in heritage conservation, but they are also being used to extract 2D information, such as orthophotos, plans
          and sections in 1:50 scale and BIM models. Furthermore, videos of the scan were created – these serve as informational and educational
          pieces of content. Finally, the scans serve to raise awareness of these historic gardens, promote a scientifically accurate recording and also makes the heritage accessible to all. Professor Hess is currently using the scanner and scans for research & teaching, and she has observed that a lot of her students are enthusiastic about the speed of the process.

          Looking Forward
          In 2021 Professor Hess is looking to extend the project further at Ebrach Abbey and the gardens, to contribute to the Cistercian Cultural Heritage
          project. Additionally, she is looking to create a digital twin model of a historic city using the ZEB Horizon, to research semantic 3D city models with
          information about urban heritage in the project ‘BIM to Twin’.

          Scanning a cavity with the ZEB Horizon


          Facility, Germany




          70m Deep

          Scan time
          Scan time




          GeoSLAMs German dealer, Laserscanning Europe, were recently tasked with scanning a 70m deep cavity in a mine 500m below the earths surface. Using the ZEB Horizon on a cradle, Laserscanning Europe were able to successfully and safely capture the data, and this is their account of the job.

          Data captured by Laserscanning Europe

          Scanning with the ZEB Horizon | Words by Laserscanning Europe

          The object of measurement is located in the Hattorf/Wintershall mining facility of the company K+S Minerals and Agriculture GmbH. This is a cavity (underground, vertical conveyor system) about 500m below the earth’s surface with a depth of 70m.

          The cavity no longer has the original storage volume due to material deposits from years of operation. The environment is dusty and it is expected that material will be deposited within the conveyor system at any time. In addition, the cavity is not accessible to humans from any opening and access is only possible through 1m diameter openings.

          The objective was to obtain a three-dimensional survey of the conveyor system with highest possible resolution for inspection of the systems condition. Furthermore, strict compliance with all work safety regulations, with minimal risk for the measuring team, was required.

          For this job, a mobile laser scanner was used. Thanks to its specifications, the GeoSLAM ZEB Horizon is ideally suited for the special conditions underground. The scanner is also suitable for surveying a cavity that is only accessible from above through a narrow shaft.

          The scanner was mounted on a cradle, which was modified to minimise rotational movements when lowered. A 50m rope was attached to the cradle, which was used to lower the measurement system into the cavity.

          Furthermore, trained members of the mine rescue team were on site to provide security and enable the scanner to be lowered and retrieved safely.

          Measurement Procedure


          Preparation of the survey: mounting of the scanner on the cradle and mounting of the rope system for lowering and raising the scanner


          Starting the measurement at the upper end of the opening to the cavity


          Lowering of the scanner, 50m deep, while the ZEB Horizon captures data


          Raising the scanner, 50m high, while the ZEB Horizon captures data


          Finishing the scanning process at the upper end of the opening to the cavity


          Ascent from the mine and analysis of the scan data in the office

          Workflow of the analysis

          Following the survey, the scan data was processed using the GeoSLAM HUB software. The raw data, i.e. the processing of the point cloud from the data of the laser sensor and the IMU, is automated as much as possible. In the case that a scan was not automatically processed (e.g. because few geometric changes are found in the object space), the focus of the SLAM algorithm can be influenced by adjusting various parameters. Once the data has been run through GeoSLAM Hub, a complete point cloud of the cavity is available in .laz format. All other common point cloud formats can also be exported with little effort.

          Since the scanner could only be lowered linearly on the rope, the earth deposits shadow smaller areas inside the cavity.


          The result of this scanning is impressive. This cavity, which is not accessible to humans, was successfully surveyed with the help of the GeoSLAM ZEB Horizon. The point cloud documents the dimensions of the cavity according to the requirements. Further missions with the GeoSLAM ZEB Horizon with similar objectives are already being planned and implemented.

          Virtual Singapore – creating a dynamic 3D city model




          100 hours




          376 ground
          floor void



          Singapore is home to some of the most profitable financial services, manufacturing and oil-refining corporations in the world. But with its accomplishments come some very specific challenges for a city-state which is limited by space but still demanding growth.

          Determined to future-proof Singapore’s success, the country has embarked on one of the most ambitious digital twinning projects the world has ever seen – creating a dynamic 3D city model and collaborative data platform, including 3D maps of the region.

          At the initial stage of the project it quickly became apparent that aerial imagery alone would not be able to capture ‘void decks’ – open spaces typically found on the ground floor of the city’s apartment blocks. These areas, which are sometimes underneath the tower block structure, are used for everything from games areas, bicycle parking, hosting wedding receptions and wakes, and, as estates grow, facilities such as shops, medical centres and even schools.

          In the face of fierce competition, GeoSLAM’s ZEB Revo was selected as the most innovative and efficient solution to collect data from these important community spaces.

          A huge time saving exercise which would ordinarily have taken 40 times longer using traditional surveying methods

          With a handheld “go-anywhere” ZEB Revo, field teams quickly captured a dense and accurate point cloud of an entire void deck, which was then used to model the deck geometry and incorporate this into the existing building models.

          376 buildings with void decks were scanned using the ZEB Revo, taking approximately 100 hours – an enormous time-saving exercise which would ordinarily have taken up to 40 times longer using traditional surveying methods.

          The ZEB Revo is often used alongside terrestrial hardware as the products are highly complementary. The data output can be easily combined through geo-referencing or scan-to-scan matching and then used to build complete 3D models. In this instance, the combination delivered highly detailed and rapid results while significantly minimising costs too.

          Beautiful laser show at the marina bay waterfront in singapore

          Virginia Tech scan WW1 battlefield terrain in France


          Vauquois, France

          Scan time

          Three times faster than terrestrial scanners


          Several Kilometers


          Battlefield Tunnels



          Mapping WW1 Tunnels in Vauquois, France

          The Vauquois battlefield in France tells a little-known story of mining warfare during World War I. This area went through 4 years of combat which saw the hilltop village of Vauquois completely destroyed. In addition, French and German troops dug miles of tunnels under each other’s positions. This meant they could plant explosive mines to ‘bomb’ the enemy from below. Consequently, this bombing left underground WWI tunnels in Vauquois.

          The WWI tunnels in Vauquois must be experienced first-hand to understand the difficulties and despair of living deep underground. Moreover, in wet, cold and cramped conditions for days at a time. Of course, not everyone can travel to France and crawl through the remaining tunnels in person. A group of researchers at Virginia Tech brought the battlefield to classrooms and museums with the help of reality capture and virtual reality (VR) technologies.

          The WWI Tunnel’s Extensive Cramped Spaces

          Combining efforts of the University Libraries, the Department of Visual Arts and numerous other disciplines, the Visualising History team travelled to Vauquois with funding from a federal grant in 2016. Over 10 days, they used traditional static scanning methods to capture details of the battlefield terrain.

          However, when they attempted to scan inside the tunnels, their progress slowed down considerably as there were tight spaces that their scanners could not get into, which made the data capture process extremely time-consuming.

          Scanning difficult to access areas with the ZEB Horizon

          Before their next trip to France, the team acquired a 3D handheld laser scanner, GeoSLAM’s ZEB Horizon, with the hopes of making their time on-site more time efficient.

          Due to the ZEB Horizon’s ease of use and speed of capture, the team collected scan data inside the tunnels more than three times faster than with the traditional stationary scanner. The time it took to scan the tunnels was crucial, as they were working on a budget, and the ZEB Horizon enabled them to do more with the time and money they had available. They also used the ZEB Horizon above ground, scanning the narrow trenches, wide bomb craters, and a church foundation.

          The ZEB Horizon also proved to be more efficient as its software processes the data into a point cloud quickly. This meant that the team where able to see where data was missing, and go back and collect it, whilst still on-site. This created a much more accurate and complete virtual environment.

          The ZEB Horizon was a gamechanger in terms of the speed of data acquisition.

          Building the WWI Tunnels with the ZEB Horizon’s datasets

          The Virginia Tech team engaged the expertise of students and faculty from numerous departments – Visual Arts, History, Education, Computer Science, Mining, Engineering, and Cinema – to build a life-size model of a tunnel and generate the virtual environment of the battlefield. This allows students wearing VR headsets to ‘walk’ through the scene, experiencing it with both sight and touch.

          The speed and accuracy of the ZEB Horizon are game changers for educational and historic preservation VR projects like this because of time and budgetary restraints. VR data processing is extremely time consuming, which means time saved scanning in the field makes grant money go farther in the computer lab. The result is a more realistic and believable experience.

          Going further with 3D laser scanning

          The Virginia Tech Visualizing History team is not stopping with creating educational experiences from their 3D data collection. They are beginning to apply their VR capabilities to other commercial applications of mobile laser scanning.  

          Smarter Spaces use GeoSLAM to scan hydroelectric dam




          1 hour




          3,000 ft



          Canadian 3D geospatial experts Smarter Spaces engaged in a partnership with the University of New Brunswick (UNB) to laser scan a tunnel in a hydroelectric dam – producing a point cloud model to be overlaid with photogrammetry.

          The Grand Falls Generating Station is a hydroelectric dam built in 1931 on the Saint John River in the Canadian province of New Brunswick and is operated by the NB Power corporation. The dam’s tunnel is shut down every 4 years for maintenance, inspection, and future life cycle planning.

          This presented Smarter Spaces with the opportunity to utilise the mobile, handheld GeoSLAM ZEB Revo to scan the tunnel – creating an accurate point cloud model. In four years’ time the process will be repeated – allowing for the first side-by-side comparisons of the tunnel’s performance to be made.

          In addition to this, NB Power has started exploring whether to build a 100-megawatt generating station in Grand Falls to produce more clean energy. The corporation is carrying out environmental and geotechnical studies, site tests, and consultations with First Nations and local residents before applying for an Environmental Impact Assessment later this year.

          It was a simple case of ‘walking and scanning’ through the tunnel environment

          The tunnel is approximately 3,000 linear feet in length and, because of its unique geometry, proposed an interesting set of challenges to scan. The tunnel environment was found to contain a lot of moisture – with a small stream running through the base. The IP67-rated ZEB Revo – which began life in mining environments – is rugged enough for such environments. The tunnel was dark, visibility was low, and walking conditions were slippery and wet. Smooth-sided surfaces also cause data collection issues for mobile scanners.

          Tunnels can often prove challenging environments for SLAM given they are low on features. The SLAM used by GeoSLAM performs even in this difficult condition.

          To overcome the risk of data slippage, 4 foot-high pylons were placed every 10 feet in random locations throughout the tunnel. This has the effect of ‘breaking up’ the monotony of the smooth-sided tunnel walls, ensuring that no data slippage occurs.

          The scan data was processed in GeoSLAM Hub software to filter, subsample and merge multiple data sets together. The final models and datasets were sent to the University of New Brunswick to support an engineering graduate with their thesis research.

          Surveying private property for as-built




          2.5 hours




          20,000 sq/ft



          “We were tasked with surveying a vast private house in order to generate accurate as-built construction drawings for renovation. The unique challenge was that the 20,000 sq. ft Santa Barbara residence was occupied at the time, requiring the survey to be completed quickly and in an unobtrusive manner.

          PPM (Precision Property Measurements) chose the ZEB Revo over other terrestrial scanners for our residential projects because of the speed and volume of data acquisition at exactly the level of accuracy required by our clients.

          In order to keep disruption to residents to a minimum, we decided to tackle the task in two swift scans over two days. The first scan consisted of data collection of the extensive ground floor and communal areas, and took around 90 minutes to complete. The private, bedroom wing was off limits on this day.

          The second scan incorporated these sleeping quarters, as well as gathering plenty of overlap from the lower floors to enable the 2 scans to be merged. After just 140 minutes of scanning, the entire house had been surveyed.

          We’ve always been confident in our ability to keep our projects to the nearest inch or less. In bringing the ZEB REVO into our arsenal of tools, we’ve kept the accuracy we’ve always had, but introduced an efficiency that allows our experts to get out there and do more for our clients

          A typical residential property of this size would have usually taken around 4 days on-site for one surveyor. PPM were able to slash this time and complete the majority of the survey work in less than 2 and a half hours with the ZEB Revo.

          The use of GeoSLAM Hub software for post-processing and merging of the two datasets allowed the project team to generate a complete digital twin of the complex structure. GeoSLAM’s cutting edge mobile mapping technology was able to deliver an accuracy down to the nearest inch.

          Handheld mapping reduces skyscraper scan time by 30 hours




          10 hours


          Belo Horizonte,


          8,357 sq/m



          “In the city of Belo Horizonte, there is a distinct mix of contemporary, classic and historic buildings on display, making it a really attractive destination to visit. What comes with the architecture on offer however, is the need to preserve it for tourists and future generations to enjoy.

          Often the fragility of buildings or lack of resources means that many buildings go untouched for decades, leaving them to crumble. It’s my job to ensure these relics remain.

          When the chance to retrofit electrical installations and a fire prevention plan to a 130-metre art deco skyscraper, the Acaiaca Building, became available, the team at Paragram knew we had to be involved.

          We were very impressed with the quality of information captured by the ZEB Revo.

          Built in the 1940s and once used as a nightclub, cinema, shops and air-raid shelter, the building required some attention in order for it to meet safety standards. Having initially planned to measure the 8,357 square metre building using manual survey methods, estimates told us this would have taken three employees over 40 hours to complete an as-built structure.

          Working alongside contractors at Criar Projetos E Consultoria, Paragram decided to use GeoSLAM’s ZEB Revo, known for its ability to quickly generate images to within a few centimetres of accuracy. With the handheld device, the job was expected to take around 10 hours in total, reducing the workload dramatically.

          Acaiaca Building

          With just two operatives and in under 10 hours, we managed to complete a scan of the building’s interior, with one walking through the building holding the device and another taking a photographic record. This innovative way of working meant we were able to gather much more information than first anticipated, including the registration of beams and roof trusses, electrical installations and engine room areas.

          The ZEB Revo is a real game changer for the architecture industry.

          As a team, we were very impressed with the quality of information captured by the ZEB Revo, which was easily incorporated into a BIM representation using Revit software.

          Almost every renovation project is governed by strict time constraints, but with GeoSLAM’s device and its ability to rapidly scan large areas, it is a real game changer to our industry. With products like this at our disposal, I am excited about what the future will hold for heritage buildings in need of a little TLC.

          paragram logo

          Oxford Archaeology scan three historic sites in under 48 hours




          48 hours




          Three sites
          across Israel


          Historic Sites

          “48 hours to scan three historic sites in Israel – ambitious or impossible? Equipped with a handheld 3D mapping device from GeoSLAM, we were determined to find out. Our first stop was the Schneller building in Jerusalem. In its 160 year history it has been used as an orphanage, barracks and ammunition arsenal. A few years ago, an archaeological team unearthed the remains of a Roman bath house and winery underneath the site. The next stage of the building’s history is a conversion into a museum of Judaism – hence the requirement for a complete, high-accuracy survey of the site.

          Made up of four floors, 130 rooms, an outer courtyard and a number of stables, we needed to work quickly to scan the entire site. Using the handheld ‘go-anywhere’ ZEB Revo, in three – 30 minute scans he captured the entire building, including survey control points to georeference the data. Using traditional scanners, this would have taken several weeks and involved multiple set-ups.

          With the ZEB Revo, what use to take weeks can now be done in hours

          Next stop was an elegant and beautiful 12th century Benedictine monastery. With no more than 30 minutes between the end of the Vespers – the evening service – and the time when the public would be allowed into the monastery, we carried out a quick reconnaissance and accurately captured the unique domed building, only possible using GeoSLAM’s ’go-anywhere’ device.

          Panorama of Jerusalem Old City with Church of the Holy Sepulchre, Israel

          Final port of call was a delapidated 19th-century merchant house in the ancient Arab town of Jaffa. The challenge here was to record the building while construction works were in progress, with hoardings and scaffolding obscuring structures. A near impossible task, but the ZEB Revo was still able to collect survey-grade data in a matter of hours, which formed the basis of a working record of elevations, sections and plans.

          In under 48 hours Jamie had captured highly accurate 3D images of 3 heritage buildings. Proof indeed that with the ZEB Revo, what used to take weeks can now be done in hours.

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