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Choate Construction utilizes GeoSLAM to create floorplans for hurricane damaged properties



Scan time

7 mins per




111,000 sq ft



2017’s Hurricane Irma was the most powerful storm to hit the continental United States since Katrina in 2005. Besides the high human cost (almost 100 lives lost in the US) the financial cost to property was estimated to top $50 billion – the 5th costliest hurricane in US history.

Amongst those damaged properties were the Westlake Apartments in Savannah, Georgia – a complex of 14 buildings containing 100 individual apartments encompassing over 111,000 sq. ft. These residential structures were flooded by the storm surge – meaning major renovations were required to repair the significant water damage.

The Westlake Apartment complex consists of 14 buildings and over 1,000 rooms

With the complex dating from 1974, no building blueprints were in existence. The huge task facing contractor Choate Construction was therefore to rapidly collect this spatial data to produce the necessary internal floorplans and external elevations. Utilizing a static scanner was out of the question as to capture all necessary data would have required over 1,500 individual set-ups – at an estimated timescale of 3 weeks.

This would have taken over 75 hours of scanner time along with a static scanner, with the ZEB Revo we were able to accomplish this in only two days

Mobile, handheld mapping was therefore the ideal solution – chosen for its incredible speed and ease of use. Instead of 1,500 scans, just 14 scans were required (one scan per building) to collect the necessary building elements (floors, walls, ceilings, rooves, doors, and windows) within the required accuracy tolerance.

The Choate Construction team utilized the ZEB Revo to complete the job. With individual scans as quick as just 7 minutes, the average scan time was 40 minutes per building. In total, the team spent less than 10 hours scanning – spending just 2 days on site.

The 3D ZEB Revo data was processed and sectioned in GeoSLAM Hub.
Allowing rapid and simple production of 2D floorplans.

This speed was of particular importance as the residential units were in occupation – with a scan time of just 5 minutes per unit, disruption to residents was kept to an absolute minimum.

The survey team were delighted with the high reliability of the scan data, all within 1” relative and absolute accuracy. They were also surprised by how well the external features (exterior walls and sloped rooves) were captured – with no drift or errors encountered.

The 3D scan data was quickly processed in GeoSLAM Hub – a one-stop shop for point cloud manipulation.

Building elements such as floors, walls, windows and doors were captured in 3D and built in a Revit model.

The office team were able to view the individual 3D point clouds, as well as merging them into one. The data was also sliced into plans, sections and elevations within GeoSLAM Draw, and exported in a CAD-friendly format. From this data, an accurate 3D Revit model was built and supplied to the project architect.

With the increasing incidence of ever-more powerful tropical storms, and an ageing property stock, such quick and simple survey solutions are surely the way of the future

Creating a digital twin to transform an aging school



Scan time

4.5 hours


Kansas City,


42,592 sq/ft



Transforming an aging school in the Jazz District of Kansas City to a community arts centre required the power of today’s real-time technology.

The Attucks building, built in 1905 and renovated in 1922 due to overcrowding, has undergone several developments over the years. For any plans to be approved on the site of the Attucks School, the commission needed substantial and comprehensive drawings – materials, floor plans, site drawings and elevations.

With several hazards identified – visible deterioration in the wood floorings, ceiling collapses, and air quality conditions including asbestos – a fast, accurate and safe survey technique was required.

Civil engineering firm, BHC Rhodes, embarked upon the complex task of a 3D Revit BIM (Building Information Model) using GeoSLAM technology. The handheld “go-anywhere” ZEB Revo is designed to be used without comprehensive training, meaning you can ‘pick up and go’, saving additional preparation time for any members of staff previously unfamiliar with the technology. It’s a simple setup and data gathering is quick and easy; wherever you can walk, you can scan.

With the aid of these lightweight, mobile scanners, specifically designed to scan difficult to access spaces, the entire property was scanned in only 4.5 hours, recording more than 43,000 measurements per second. A BIM model was provided two weeks earlier than expected providing a comprehensive picture of the asset. Only with these modern tools could a real-time digital twin of the ageing building be created quickly, and safely – saving considerable time and money.

attucks school

GeoSLAM Sample Data

View and download data in our free point cloud viewer

Here’s some helpful tips for the best viewing experience

  • If your internet connection allows, move the Point Budget slider to the maximum amount available to view all the points in the cloud.
  • Making the point size smaller using the Point Size slider makes the data easier to view and interpret.
  • In the tools section of the viewer, you can measure the distance and angles of features within the pointcloud.
  • Using the materials section of the viewer, you can use the Select Attributes dropdown to view by intensity, elevation and RGB (if point cloud is coloured).

World Trade Center Subway Station

Location: New York, USA
ZEB Scanner: ZEB Horizon
Scan time:
10 Minutes

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